bschelle

1991 Eldo water PIPES need replacing!

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My 91 Eldo has a slow drip and I think it is the coolant pipes that run along the side of the block  and I think they are behind the exhaust manifold. Has anybody replaced theirs? How do you get to them? I can see them but I don't see how to get to them.

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Hello.

If they are anything like the mid 90s platform they are not that fun.

Do the pipes look rusted?

If so I would expect to replace the pipes and hoses.

It could be that #7 hose. Check the clamps if you can. Think they were wormgear. If you can spray the area with brake cleaner and dry it good.

That should help to closer pinpoint the source of the leak.

How much of a drip is it?

Sorry you had not gotten a response yet. Must have gotten missed. 


GM FAN FOREVER

Nice, clean, luxury= fine automobile

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Those pipes are long gone! discontinued!!  check cadillacsonly.com in CA

Edited by barczy01

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Thanks for the replies. The leak is almost a steady stream when I pressurize the system. I can see the hose but I have no idea as to how to get to it. It looks like the radiator and condenser have to be removed to get to it.

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So wait is this in front of the engine or the back?

It looks like the AC compressor which IIRC is front bottom of the engine. 

So you are saying they are on the Radiator side. 

What about from underneath?


GM FAN FOREVER

Nice, clean, luxury= fine automobile

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It is the front of the engine on the passenger side of the block. I can see the hose but have no idea as to how to get to it. There doesn't seem to be a way from the bottom , but that is why I am asking if anybody has ever done this repair.

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From what I remember I had a couple of these jobs back in the day. The is a pinhole that forms in the back of the water pump outlet housing , the black piece that is behind the timing cover, the piece the lower radiator mounts too. It's a job indeed!

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I think they use a short silicone hose up in there....along with metal pipes. The idea being it would never require replacement for service life of the vehicle. 

I don't think it was designed to last 28 years. 

I bet you will have to remove the AC compressor to get to it and make repairs. 

 

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7 hours ago, barczy01 said:

From what I remember I had a couple of these jobs back in the day. The is a pinhole that forms in the back of the water pump outlet housing , the black piece that is behind the timing cover, the piece the lower radiator mounts too. It's a job indeed!

You are absolutely right. That was on the 4.9s. I remember those. Had nearly every one of them fail. Been awhile. That is probably the cause. 

NEed to be sure though by pinpointing to it. Otherwise it is just guessing


GM FAN FOREVER

Nice, clean, luxury= fine automobile

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Found a pretty good pic on Google....and it's from caddyinfo....so it's been posted before.  

water pump.jpg

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@bschelle here is a different view of what Logan posted.  I couldnt send this in a PM

49WaterPumpInlet.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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Thanks guys! I am taking my camera snake and see if I can pinpoint the leak. I'll be back with the results.

Thanks again!

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@bschelle here is a different view of what Logan posted.  I couldnt send this in a PM

I just noticed this involves the front cover, interesting.  


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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@bschelle here is a different view of what Logan posted.  I couldnt send this in a PM

I just noticed this involves the front cover, interesting.  

I just found this thread I found the water pump inlet in 2016!   Check this @bschelle

 


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 put the pressure on and I can see the leak coming off of one of the clamps to the silicone hose that has been mentioned here. Now I need all of your expert advise as to what it is going to take to get to it. I appreciate all of the advise I have received!

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2 hours ago, bschelle said:

I put the pressure on and I can see the leak coming off of one of the clamps to the silicone hose that has been mentioned here. Now I need all of your expert advise as to what it is going to take to get to it. I appreciate all of the advise I have received!

Well this is actually good news.  Is this a screw clamp or a spring clamp?  

To me the easiest way is to remove the front cover which will entail removing the crank pulley.  But that will give you access to the water pump inlet/water pump assembly to inspect it, replace the crank seal and water inlet gasket.  I dont remember if the crank pulley can be removed easily through the wheel well however or if the engine carriage must be dropped.  

I linked OldCadTech he is familiar with this job, lets see if he stops by.  

@OldCadTech


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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They are screw clamps. It must have been repaired before. There are 2 different style screw clamps on it. I am dropping the a/c compressor now. The fsm does not have very good diagrams. it is hard to tell which bolts to remove.

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The A/c does not have to be evacuated. Disconnect the mounting bolts and let it hang. Clamp and/or hose removal is pretty easy after that.

Most of the time it is the inlet leaking but you may be the exception. 


THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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42 minutes ago, OldCadTech said:

The A/c does not have to be evacuated. Disconnect the mounting bolts and let it hang. Clamp and/or hose removal is pretty easy after that.

Most of the time it is the inlet leaking but you may be the exception. 

@OldCadTech thanks for popping in!


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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@BodybyFisher Thank you !

I think I did another post on the inlet removal a while back???????


THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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27 minutes ago, OldCadTech said:

@BodybyFisher Thank you !

I think I did another post on the inlet removal a while back???????

You certainly did, thanks! @OldCadTech

 


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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Can I presume that it is a 3/4" silicone heater hose? I found a piece of high temp (350 degrees) 3/4/hose.

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I can't help you there, sorry


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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