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ISS Sensor Replacement


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I am going to do the ISS Speed Sensor this weekend (Memorial Day Weekend).

I plan on replacing the following:

  1. Side Cover Gasket (#30 in manual)
  2. Case to Case Cover gasket (#44 in manual)
  3. Sprocket Support to Case Cover gasket (#43 in manual)
  4. ISS Speed Sensor (#14 in manual)
Plus the two lower filters and the cooler line o-rings that I can access.

I have not played with the rubber seals these cars use, do I coat them with an RTV and if so what kind of RTV (red or blue).

I do not plan on replacing the side scavenger filter just clean it, is that ok? If I can get the filter to body seal I will buy one.

Do you think I should replace the Axle Case Cover Seal (#37)?, and can I tap it in while the case cover is off?

Thanks, Mike

MC-1.jpg

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Thanks Mac, I did know about it, but its smart to put a link to that ISS Sensor job in this thread. I will definately refer to it. Thanks

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thanks Mac, I did know about it, but its smart to put a link to that ISS Sensor job in this thread. I will definately refer to it. Thanks

That link is for changing the sensor with the transaxle in the car, is that what your doing? Or are you dropping the powertrain?

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Yes, thanks to Logan's idea, I am using long bolts to slowly drop the carriage about 8 to 10 inches so that I can clear the frame with the side pan. Logan sent me the bolts. Thanks AGAIN, Logan! I'll get even

Getting the Julian Date off my transmission was a PITA, I had to take the tag off the tranny and clean it up.. My Julian Date is 6066, what is wrong with JUNE 1996?, why the secret code... :lol: (I am sure there is a good reason)

Here is my parts breakdown and cost so far, many parts of which are not related to the ISS Sensor job, but that I plan on replacing, this weekend. Look at the price of the COVER GASKET!!!!! $47, it cost more than the SENSOR! :blink: Think about this, the ISS SPEED SENSOR is $25, and Caddy wanted $1600 to do this job... hopefully, that price won't look good to me :blink: I am looking forward to a tranny that does not leak like a sieve.

OIL LEVEL SENSOR (12603784) - $28.87

OIL PRESSURE SWITCH (12571721) - $6.95

CROSSOVER GASKET(2) (12562046) - $4.54

CROSSOVER GASKET(2) (12562047) - $4.61

OIL FILTER ADAPTER GASKET(2) (3543719) - $2.30

TRANS SIDE FILTER (8681416) - $27.07

OIL DRAIN PLUG (11518377) - $3.28

DRAIN PLUG GASKET(5) (3536966) - $.90

O2 SENSOR (25312197) - $79.57

TRANS SIDE COVER GASKET (8679392) - $9.38

CASE COVER GASKET (24208778) - $46.64

I.S.S. SP/SENSOR (6066) (24232616) - $24.84

Total $270.10

http://en.wikipedia.org/wiki/Julian_date <<<Am I just stupid?, or is that confusing? :huh:

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Here is a photo of the Tranny Case Cover Gasket, NOW, I know why it was so expensive, its sandwiched aluminum, and I am glad I bought a new one, as I doubt that it would be good once its removed, that black material has a rubbery feeling to it

Parts003.jpg

The ISS Sensor is on the right and my new Bank 2 O2 Sensor is on the left:

Parts005.jpg

Here are the new coolant crossover gaskets:

Parts004.jpg

Here is the new Oil Level Sensor:

Parts008.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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That's a lot of labor sitting there.

You have that right, it's all labor, the dealer gets about $700 for the crossover gaskets and they quoted me $1600 for the ISS sensor, the total for those parts is like $45.... I am hoping that I can do this job...I am a little nervous

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I am hoping that I can do this job...I am a little nervous

Don't be nervous Mike, you know how much experience is on this forum. Help is just a keystroke away. Besides, after that a/c job you did, I think you'll do fine.

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I am hoping that I can do this job...I am a little nervous

Don't be nervous Mike, you know how much experience is on this forum. Help is just a keystroke away. Besides, after that a/c job you did, I think you'll do fine.

Thanks for that vote of confidence!

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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This is a hard job. The electrical conduits are really hard to get out of the way. As someone mentioned this job is not for the faint of heart.. All I am doing is removing parts and putting related parts, brackets etc in large baggies to keep the parts organized.

I don't think I will get this done until need weekend unless things begin to go smoother tomorrow. I need Logan to tell me about his experience with dropping the carriage. This is a big job..

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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It seems I can only use 'fast reply.' Board still messed up a bit..been trying for 15 minutes to reply..

I did not remove the radiator. I did drain the coolant.

I did discharge the AC. I have a AC vacuum pump. Easy job.

I left the ABS unit alone. I did unbolt it from the cradle. 2 rubber mounts. Easy to do on a 2001.

I did not disconnect the engine harness. I think the 2001 is a bit different then a 1996. I did have to flop the PCM and harness onto the engine. My PCM is in the air intake.

Had to disconnect the steering column at the rack.

Service manual has you remove remove O2/CAT heat shield. PIA. Easier to cut and bend shield for clearance. Then bend back when done.

Watch out for rear bank cam senseor. Tight.

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It seems I can only use 'fast reply.' Board still messed up a bit..been trying for 15 minutes to reply..

I did not remove the radiator. I did drain the coolant.

I did discharge the AC. I have a AC vacuum pump. Easy job.

I left the ABS unit alone. I did unbolt it from the cradle. 2 rubber mounts. Easy to do on a 2001.

I did not disconnect the engine harness. I think the 2001 is a bit different then a 1996. I did have to flop the PCM and harness onto the engine. My PCM is in the air intake.

Had to disconnect the steering column at the rack.

Service manual has you remove remove O2/CAT heat shield. PIA. Easier to cut and bend shield for clearance. Then bend back when done.

Watch out for rear bank cam senseor. Tight.

Thanks Logan, I was waiting for your reply before I started this morning, Thanks, Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Any update on the progress of your job? I'm very curious on how it's going. I couldn't imagine doing a job like that. I hope you have a garage!

-Dusty-

- 02 Seville STS, white diamond

- 93 Sixty Special, Tan with vinyl top

- 79 Coupe DeVille, Tan with Tan top

- 06 GMC Sierra Z71, Black

- 92 Silverado C1500, black and grey

- 83 Chevy K10 Silverado, Black and Grey

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OK, I was ready to drop my carriage, pulled one of the carriage bolts and they are M12 1.75. The bolts Logan sent are M14, not sure what year those were from. No one has metric threaded rods only SAE. I had to order two M12 1.75 threaded rods, they are one meter in length. Got them at MCS on line, their customer service was open Saturday. So this job has been postponed till next weekend, but I am ready to go now. Car is now sitting on truck stands.

I had my alternator fully rebuilt for $155, it was due according to my friend at Montrose Starter and Alternator rebuilders.

I may put in the coolant crossover tomorrow.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I would hate to think that my intermittant P0717 problem could have been caused by a short at the transmission connector. But there is a strong chance that this intermittant P0717 code could have been caused by moisture in the connector. If you are getting the P0717 code, I strongly recommend checking this connector closely for dampness, debris, spiders nests, etc..

The following picture is a photo of the transmission connector, it was damp, gritty, and it looked like a spider make a nest

ISSCrossover6_07001B.jpg

Here is another of it before cleaning

ISSCrossover6_07002B.jpg

In the following photo I think water/coolant was running down these wires to pool at the bottom collecting at the plug as seen by the dirt in the photos above

ISSCrossover6_07004.jpg

Here is the plug cleaned up

ISSCrossover6_07003B.jpg

Here is the finished plug, taped to stop water intertrusion

ISSCrossover6_07012.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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When I was a kid, I recall seeing a plug on the torque convertor. Draining the converter was an important part of changing the tranny fluid. Well today I was working on the electrical harness and I noticed a plug on the case that looked just like the plug that was on the torque convertor, When I open the case, I will look to see what this from the inside. This may just be a service port. See the circled plug:

ISSCrossover6_07014B.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I would hate to think that my intermittant P0717 problem could have been caused by a short at the transmission connector. But there is a strong chance that this intermittant P0717 code could have been caused by moisture in the connector.

Mike:

I do not see any insulation damage in the pictures you posted. Greasy dirt or dinosaur nests will not cause any problems before the insulation is compromised.

However, the contact pin end of that connector (and its mate) is a different story. Hit the contacts with a shot of contact cleaner and inspect the pins with a magnifying glass.

WD40 will eliminate any moisture.

Jim

Drive your car.

Use your cell phone.

CHOOSE ONE !

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I would hate to think that my intermittant P0717 problem could have been caused by a short at the transmission connector. But there is a strong chance that this intermittant P0717 code could have been caused by moisture in the connector.

Mike:

I do not see any insulation damage in the pictures you posted. Greasy dirt or dinosaur nests will not cause any problems before the insulation is compromised.

However, the contact pin end of that connector (and its mate) is a different story. Hit the contacts with a shot of contact cleaner and inspect the pins with a magnifying glass.

WD40 will eliminate any moisture.

Jim, both sides of this connector the male and female sides were clean and dry. I was thinking that moisture got into this side of the plug where the wires go in to cause problems. You and I had spoken about this connector a couple of times.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I would hate to rip into the trans to replace a good input speed sensor. Are you planning on reassembling the water crossover before lowering the cradle? If so, it may make sense to drive it for a few days to make sure the ISS code is still there before replacing the sensor. On the other hand, if you have to remove a bunch of parts that you already have off the car, it might not make sense.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I would hate to rip into the trans to replace a good input speed sensor. Are you planning on reassembling the water crossover before lowering the cradle? If so, it may make sense to drive it for a few days to make sure the ISS code is still there before replacing the sensor. On the other hand, if you have to remove a bunch of parts that you already have off the car, it might not make sense.

I am fully committed to replacing the speed sensor at this point, I have too much off the engine and I am there. My tranny needs a re-seal from the side pan, to the side cover to the bottom pan. I am at 96k miles so its time for some re-sealing, dumping of fluid and changing of screens.

On Friday I stopped by my local Cadillac dealer and spoke to the 'major surgery' mechanic that drops carriages and does time-serting. When I told him what I was doing he gave me a BUNCH of tips and said I didnt need to remove the AC compressor and to just drop down the LEFT side of the carriage, he does that all the time. That is great. I had a setback as the bolts that Logan sent me were 14MM and my carriage bolts are 12MM, so I ordered two 1 meter long 12mm 1.75 threaded rods from MCSonline. I get out at 12:30 on Fridays, so I will get a chance to do some work this Friday. In the meantime, I am going to clean up parts and order a set of ignition wires as mine show burns from arching, they look like they are due for replacement.

This has taken way longer than I anticipated but I an only working on weekends and its a bigger job than I expected given that I am replacing so much at one time so it not just the ISS Speed Sensor

When I get done with this job, I will have done the following

ISS Speed Sensor

Cleaned Tranny Plug

New side cover gasket

New side pan seal

Replaced Side Filter

Rebuilt the alternator

New heater pipes

Replaced green silicone hoses

Replaced upper radiator hose

New heater hoses

New crossover gaskets

Cleaned EGR Ports in crossover

Cleaned EGR

R&R and cleaned Throttle Body replaced gasket

R&R and cleaned Intake Spacer and replace seal

Replaced Oil Level Sensor

Replaced Oil Pressure Switch

Replaced positive battery bolt including lead lug

New Air Filter

Cleaned Fuse/Relay Center

Replace ignition wires

I can't wait to see this thing run.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I forgot you needed to fix some leaks in the trans. The good news is that you'll be good for another 200,000 miles. When you're all done, you need to take your neighbor for a "white knuckle ride". :lol::lol::lol:

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I forgot you needed to fix some leaks in the trans. The good news is that you'll be good for another 200,000 miles. When you're all done, you need to take your neighbor for a "white knuckle ride". :lol::lol::lol:

Oh yes you are right, I need to do that for sure. Today he had something to say again. I will make sure he brings a spare pair of underwear.....

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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When I get done with this job, I will have done the following

ISS Speed Sensor

Cleaned Tranny Plug

New side cover gasket

New side pan seal

Replaced Side Filter

Rebuilt the alternator

New heater pipes

Replaced green silicone hoses

Replaced upper radiator hose

New heater hoses

New crossover gaskets

Cleaned EGR Ports in crossover

Cleaned EGR

R&R and cleaned Throttle Body replaced gasket

R&R and cleaned Intake Spacer and replace seal

aced Oil Level Sensorone!

Replaced Oil Pressure Switch

Replaced positive battery bolt including lead lug

New Air Filter

Cleaned Fuse/Relay Center

Replace ignition wires

I can't wait to see this thing run.

Mike,

You've spoken in the past of purchasing a "newer" Cadillac. Maybe an STS or an Eldorado . . . .

Not to put too fine a point on it BUT,

JUST EXACTLY WHAT!!! might it take for you to move in that direction?? :lol: :lol: :lol:

I hope you'll take me for a ride when you get that thing done!

Regards,

Warren

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It's either going to be foolish for me to get rid of this, or someone is going to get a great car..

I sprayed the crossover tonight with high temp black paint. By the time Friday comes I will have my new carriage drop bolts and nuts.

When this is running again, we can meet for for lunch, Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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