BodybyFisher Posted June 7, 2007 Author Report Share Posted June 7, 2007 Wow Mike! Looks like you're having fun! Glad to see you're getting it fixed though...I'm sure that's been really heavy on your mind. I wish I could be there to give you a hand. You'll find out who your true friends are...kind of like moving, if you know what I mean. If you need any tools, please ask if I have it before you run out and buy it. Just curious, before tearing into it, did you ever test your electrical connector to your tranny after cleaning it up with contact cleaner? Was it not the connector causing your ISS Speed Sensor problem? I read that you deducted that your crossover was leaking on that connection. Looks like you're doing it RIGHT though! Wouldn't expect YOU to do it any other way. You da man! Ok all you east coasters, get over there and give Mike a hand this weekend! Thanks Kim, yea I am having fun all right Back at it on Friday AM, I want to get far on Friday, I'd love to get it back together this weekend... Believe it or not, I work better by myself, not sure why that is. I lose focus when people are around talking, my wife thinks I am odd and sees that as a negative. I just focus to intently when I am working on my car that, distractions create problems. I can't wait to see how it runs, I hope that does not turn into IF it runs Looking forward to finishing it this weekend, I need a road trip... 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 Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 7, 2007 Author Report Share Posted June 7, 2007 >>> If he had a computer, I'd link him to this site, so he could watch from his house Mike - Now There's An Idea - how about linking a live webcam up so we can watch all this !!!!!!!!!!!!! I actually have a web CAM and a laptop. The camera is only 640 by 480 I think, I don't think the resolution is impressive, maybe I will buy a better one. How would I go about broadcasting it? It would be boring as hell, I think I don't sing or dance or even tell jokes, LOL I planned to do a video tape of the ISS Speed Sensor job, I need a small tripod. 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 Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 10, 2007 Author Report Share Posted June 10, 2007 To gain clearance to get the crossover off, I removed the throttle body, I had planned on replacing the throttle body gasket anyway. The throttle body cleaning was uneventful and it cleared up good using GM upper engine cleaner (spray). The heavy gunk came right off the rear of the throttle plate. Here is the throttle body cleaned up: This is the 1 1/2 inch spacer plate between the thottle body and the thermo-plastic intake (this is a 1996 engine), this part was really dirty and caked with paste like greasy carbon. Again soaking it in GM upper engine spray cleaner took it right off with the help of a brass detailing brush. This photo shows carbon grease that I was able to scape off like icing on a cake This is the intake, notice the white o-ring. At the bottom it appears that I may have had a vacuum leak, look at the o-ring color Here is a close-up of the o-ring, this certainly looks bad to me, if oil could get out, air could probably get in. This could explain why when I drove long trips, when I stopped, the engine raced at the red light. If the engine sucked air at this location it would induce a high idle, I believe So the spacer plate cleaned up good, there was a 1/8" inch coating of the gunk everywhere: I don't know if it will be obvious from this photo but this port has been narrowed quite a bit from carbon deposits, I will clean this with a round wire brush Here is closer shot 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 Link to comment Share on other sites More sharing options...
jcobz28 Posted June 11, 2007 Report Share Posted June 11, 2007 I have a 96 SLS I'm rebuilding now too. My tb and spacer plate looked just as nasty. I also had my intake manifold off, and looked inside... yep, just as nasty as the other parts. Why is it these intake parts gum up SOOO bad? Makes me want to !EGR and !PCV and run a catch can instead. Not emissions legal I know, but avoid this mess. I had to give me intake manifold a frickin' bath.... literally. I took it into my bathtub, submersed it, and ran all sorts of cleaning tools and detergents through it to de-gunkify it. Keep following the airflow pathway and the nastiness continues. I had significant carbon deposits on my intake ports of the heads, valves, and piston tops. This definitely underscores the need to run good fuel in these motors, and maybe occassionally use a top-end cleaner product?!? Also, I got to thank you for posting your wiring harness pics. I realize you are posting them to show what a mess it all is, but they a proving very useful to me for remembering where to route different branches of the harness! I labeled all the connections, but failed to make any diagram of where the harness tucks behind this or that for routing. Thanks for the pics! They've been great for me! Other similarities between our SLS's.... my heater pipes look the same as yours. I'm just sanding off the rust and re-painting the pipes with a hi-temp engine enamel though. No leaks. My crossover gaskets (2 upper / 2 lower) were shot just like yours. Bad design!?!? -jacob Link to comment Share on other sites More sharing options...
WarrenJ Posted June 11, 2007 Report Share Posted June 11, 2007 I have a 96 SLS I'm rebuilding now too. My tb and spacer plate looked just as nasty. I also had my intake manifold off, and looked inside... yep, just as nasty as the other parts. Why is it these intake parts gum up SOOO bad? Makes me want to !EGR and !PCV and run a catch can instead. Not emissions legal I know, but avoid this mess. I had to give me intake manifold a frickin' bath.... literally. I took it into my bathtub, submersed it, and ran all sorts of cleaning tools and detergents through it to de-gunkify it. Keep following the airflow pathway and the nastiness continues. I had significant carbon deposits on my intake ports of the heads, valves, and piston tops. This definitely underscores the need to run good fuel in these motors, and maybe occassionally use a top-end cleaner product?!? -jacob I'll likely be led to slaughter on this, but I'm a fan of "top-tier" gasoline. Of course, it might not help your intake problems, but I'd like to do as much as possible to reduce "significant carbon deposits on my intake ports of the heads, valves, and piston tops." Regards, Warren There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
Ranger Posted June 11, 2007 Report Share Posted June 11, 2007 Jacob, The gas you use has nothing to do with the gunk you found in the intake. It comes from the EGR & PCV. Both of those systems flow crankcase and exhaust gases through the intake. When you shut down, they settle out and unlike a carbureted system, there is no air/fuel mixture flowing through it to was it out. Over the years it builds up and gets pretty nasty looking, though harmless. Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 11, 2007 Author Report Share Posted June 11, 2007 Jacob, The gas you use has nothing to do with the gunk you found in the intake. It comes from the EGR & PCV. Both of those systems flow crankcase and exhaust gases through the intake. When you shut down, they settle out and unlike a carbureted system, there is no air/fuel mixture flowing through it to was it out. Over the years it builds up and gets pretty nasty looking, though harmless. I recall the Guru saying that 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 Link to comment Share on other sites More sharing options...
KHE Posted June 12, 2007 Report Share Posted June 12, 2007 I have a 96 SLS I'm rebuilding now too. My tb and spacer plate looked just as nasty. I also had my intake manifold off, and looked inside... yep, just as nasty as the other parts. Why is it these intake parts gum up SOOO bad? Makes me want to !EGR and !PCV and run a catch can instead. Not emissions legal I know, but avoid this mess. I had to give me intake manifold a frickin' bath.... literally. I took it into my bathtub, submersed it, and ran all sorts of cleaning tools and detergents through it to de-gunkify it. Keep following the airflow pathway and the nastiness continues. I had significant carbon deposits on my intake ports of the heads, valves, and piston tops. This definitely underscores the need to run good fuel in these motors, and maybe occassionally use a top-end cleaner product?!? Also, I got to thank you for posting your wiring harness pics. I realize you are posting them to show what a mess it all is, but they a proving very useful to me for remembering where to route different branches of the harness! I labeled all the connections, but failed to make any diagram of where the harness tucks behind this or that for routing. Thanks for the pics! They've been great for me! Other similarities between our SLS's.... my heater pipes look the same as yours. I'm just sanding off the rust and re-painting the pipes with a hi-temp engine enamel though. No leaks. My crossover gaskets (2 upper / 2 lower) were shot just like yours. Bad design!?!? -jacob Make sure you get ALL the liquid out of the intake - you don't want to have any liquid get into a cylinder and hydrolock it. Don't worry about the inside of the intake - it is harmess. It will be back to the pre-cleaning condition in short order. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 12, 2007 Author Report Share Posted June 12, 2007 I have a 96 SLS I'm rebuilding now too. My tb and spacer plate looked just as nasty. I also had my intake manifold off, and looked inside... yep, just as nasty as the other parts. Why is it these intake parts gum up SOOO bad? Makes me want to !EGR and !PCV and run a catch can instead. Not emissions legal I know, but avoid this mess. I had to give me intake manifold a frickin' bath.... literally. I took it into my bathtub, submersed it, and ran all sorts of cleaning tools and detergents through it to de-gunkify it. Keep following the airflow pathway and the nastiness continues. I had significant carbon deposits on my intake ports of the heads, valves, and piston tops. This definitely underscores the need to run good fuel in these motors, and maybe occassionally use a top-end cleaner product?!? Also, I got to thank you for posting your wiring harness pics. I realize you are posting them to show what a mess it all is, but they a proving very useful to me for remembering where to route different branches of the harness! I labeled all the connections, but failed to make any diagram of where the harness tucks behind this or that for routing. Thanks for the pics! They've been great for me! Other similarities between our SLS's.... my heater pipes look the same as yours. I'm just sanding off the rust and re-painting the pipes with a hi-temp engine enamel though. No leaks. My crossover gaskets (2 upper / 2 lower) were shot just like yours. Bad design!?!? -jacob As others have said, don't worry about the primordial goo that is in the bottom of the intake manifold. And whatever you do make darn sure you get all the liquid out as KHE stated, otherwise you will end up with something that looks like this picture. And guess what, a GM tech caused that hole.... 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 Link to comment Share on other sites More sharing options...
jcobz28 Posted June 12, 2007 Report Share Posted June 12, 2007 I'm positive all the water is out. I rotated it a bunch of times, blew it out with compressed air, and best of all, it's been sitting on the garage floor for 2 months since I washed it. I'm sure evaporation took care of any little bit that was left. Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 12, 2007 Author Report Share Posted June 12, 2007 I'm positive all the water is out. I rotated it a bunch of times, blew it out with compressed air, and best of all, it's been sitting on the garage floor for 2 months since I washed it. I'm sure evaporation took care of any little bit that was left. Cool, we would be remiss not saying something after our friend IAN posted that pic of what happened when a tech used upper engine cleaner that pooled in the intake, and getting sucked into the engine on acceration, hydrolocking the engine. See this article and why its complicated getting the water out, you are probably right that it evaporated, however: If an engine has failed and is being rebuilt or replaced, the Engine Rebuilders Association (AERA) says the plastic intake manifold also should be replaced. The reason? Because of the complex shape of the manifold, it's impossible to tell if any engine debris has been blown back inside it. If the debris works loose and is ingested into the new engine, it will cause a repeat failure. That you don't want. You can see the whole article: http://www.babcox.com/editorial/us/us100232.htm 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 Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 17, 2007 Author Report Share Posted June 17, 2007 I painted my crossover with heat resistant paint... 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 Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 16, 2007 Author Report Share Posted November 16, 2007 I never really finished this thread because I moved on to the ISS speed sensor in the tranny and i did this job at the end of dropping the engine carriage, changing the ISS speed sensor, pressure sensor and TC Sensor in the tranny, and the heater pipes, here is that thread, this job is sort of finished in that thread http://caddyinfo.ipbhost.com/index.php?sho...ss+speed+sensor 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 Link to comment Share on other sites More sharing options...
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