[Drew_deville]

Does this hose carry oil, I did an oil change maybe two months ago and have lost 4 quarts, I notice the bracket where the brake lines are under this hose are covered in wet oil

http://s37.photobucket.com/user/drew71787/media/the caddy/20150222_170849.jpg.html?sort=3&o=0

 

[Ranger]

That looks like an A/C line.

 

[MoistCabbage]

Unless you have an oil cooler, there are no oil carrying hoses.

 

[Drew_deville]

Unless you have an oil cooler, there are no oil carrying hoses.

It goes to the bottom of the radiator area

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That looks like an A/C line.

Its located just under the air box

 

[MoistCabbage]

The A/C lines go to the evaporator, right in front of the radiator. Oil cooler lines would go into the radiator side tank, or to an auxiliary oil cooler. I don't believe your car has either.

 

[amunderdog]

You updated your vehicle information
1994 sedan deville 4.9
Thanks

Yes there are oil cooler hoses/lines under the air filter box, They run from drivers side of radiator to the base of the oil filter.
Pull the air filter box off the motor (about three bolts and nuts).
Then you can get a good look at the lines from radiator to oil filter base.
Sometimes it is the lines, sometimes it is the o rings where the lines seal to radiator.
Had that trouble with mine also.
See post 13 thru 19 http://www.cadillacforums.com/forum...85/284445-i-have-issues-1994-deville-4-a.html

 

[drewsdeville]

Yup. All 4.X cars are equipped with an oil cooler.

 

[Drew_deville]

You updated your vehicle information
1994 sedan deville 4.9
Thanks

Yes there are oil cooler hoses/lines under the air filter box, They run from drivers side of radiator to the base of the oil filter.
Pull the air filter box off the motor (about three bolts and nuts).
Then you can get a good look at the lines from radiator to oil filter base.
Sometimes it is the lines, sometimes it is the o rings where the lines seal to radiator.
Had that trouble with mine also.
See post 13 thru 19 http://www.cadillacforums.com/forums/cadillac-deville-1985-2005-including-1985/284445-i-have-issues-1994-deville-4-a.html

Thank you! ! Would you suspect the o rings or the entire hose needing replacement?

 

[amunderdog]

Hard to tell from here
You need to get the air filter box and intake duct work off and get in there.
Do a visual inspection of the problem areas (maybe something obvious).
Next a can or two of brake clean or some other degreaser and some shop towels (compressed air can be very helpful).
Clean everything up as good as you can ( i would do this regardless) as I dislike looking at or working on an oily greasy mess.
Then if you still question the actual source of the leak, run the engine some and see where the problem is.

 

[pompste]

1 of my oil cooler hoses ruptured a few years back on my '95 Deville 4.9., what a mess that was----oil all over the place.
I noticed "before" it ruptured that the oil cooler line/hose seemed almost saturated as the line was slimy.
I should have had the line/hose replaced before it ruptured.I had both lines/hoses replaced at the same time---figured since 1 ruptured the other would be soon to follow.
If your oil cooler lines/hoses are slimy and the original ones----could be a real clue they need replacing.

 

[Drew_deville]

1 of my oil cooler hoses ruptured a few years back on my '95 Deville 4.9., what a mess that was----oil all over the place.
I noticed "before" it ruptured that the oil cooler line/hose seemed almost saturated as the line was slimy.
I should have had the line/hose replaced before it ruptured.I had both lines/hoses replaced at the same time---figured since 1 ruptured the other would be soon to follow.
If your oil cooler lines/hoses are slimy and the original ones----could be a real clue they need replacing.

Indeed, what was the cost of replacement if you don't mind me asking

 

[drewsdeville]

Fwiw, when I replaced them on my '89, I think they were no longer available. I ended up getting a set made at a local hydraulic shop.

 

[amunderdog]

Rock auto lists them around 100 for both
You have to note inlet or outlet hose when selecting

 

[Drew_deville]

Rock auto lists them around 100 for both
You have to note inlet or outlet hose when selecting

Thanks ill look them up