Oil leak

Tiny
STEELWEELS
  • 2012 GMC C1500

1991 GMC K2500 four wheel drive 5.7L, 250,000 plus miles. The oil cooler adapter leaking at block, could not find gaskets that were to be there, tried what I could, drove twelve miles, fixed, so I thought. The next morning five miles later it blew again in same spot, new gaskets are waiting, but need to know how they are installed. No one around can say for sure, GM dealer wants the work, will not help me. We are on welfare right now and need this running, no money left, just put $1,500.00 in front end. Everything is now new, water pump, all electronics on intake is new. Trying to keep this thing alive until we can find work and get newer truck. Sorry, no money for donation, so I am trying to help others on here if I can.

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Sunday, March 4th, 2007 AT 9:43 AM

31 Replies

Tiny
CHEVYII
  • MEMBER

Okay STEELWEELS, get your message. Is it leaking at the oil filter portion of the cooler like right above it? And what brand oil filter are you using?

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Sunday, March 4th, 2007 AT 12:44 PM
Tiny
STEELWEELS
  • MEMBER

Fram oil filter, but it is leaking where the adapter mounts to the block. I changed the paper gasket with the metal sandwiched between, and put an o-ring to try and seal it, and it blew again after fifteen miles.

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Sunday, March 4th, 2007 AT 1:07 PM
Tiny
CHEVYII
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So you pulled the filter and then removed the two cooler housing bolts 10 mm dropped it and replaced the o-ring. Actually there is two that go on it. And were they dealer parts? There were several updated on the parts should be six to eight dollars. If you have air compressor at your place you could use low air to blow through the lines to check for blockages.

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Sunday, March 4th, 2007 AT 1:09 PM
Tiny
STEELWEELS
  • MEMBER

Yes, correct on all, dropped two bolts, moved brace away that goes to inspection pan for flywheel, was told by radiator shop not to remove lines if not needed. Found a two inch piece of gasket (that is metal sandwiched by paper) on top of what looks like a screen or filter, did not find anything else. Replaced this gasket (included in set) which is a Napa Victor Reinz set (gs33272), and also put the rubber o-ring on where the adapter mounts to the block. No sealer though, was not sure about that. I was told maybe pPCV valve was plugged or have back pressure somewhere. Just not sure what gaskets are needed and where they go. There are different kits, Fel-Pro (es72671) but still no instructions on how to install them and which ones are needed.

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Sunday, March 4th, 2007 AT 4:13 PM
Tiny
CHEVYII
  • MEMBER

Go to the dealer they will have micro film. I used on kit a few months back and there was not much in it. As I said before if you have a restriction in the line or cooler which should be your radiator that may do it, but not the PCV valve.

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Sunday, March 4th, 2007 AT 6:03 PM
Tiny
STEELWEELS
  • MEMBER

So does this mean I need to pull the radiator and have it shop tested? Or is there a way I can do it while it is still in the truck? I do have a small compressor that I can try to blow out lines (really hate to break seals though) will try to get this done today and leave the results here. I thought maybe I could find this diagram online somewhere. Need to post transmission problem on 1989 Chevrolet after I get this one done. Not sure if it is transmission or torque converter.

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Monday, March 5th, 2007 AT 6:50 AM
Tiny
CHEVYII
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No do not take it to the shop you can do it on the truck. Look in the adapter you might have to step down some hose on you blower, but you need to replace the gaskets anyway on the adapter? I thought.

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Monday, March 5th, 2007 AT 8:34 AM
Tiny
STEELWEELS
  • MEMBER

Hey CHEVYII, was just able to get to the truck today, adapter is loose and hanging, one line is off, both lines are off the radiator. When I loosened and dropped the adapter the lines spun in the connectors, is that okay? Can I blow air through the holes to radiator to see if there is flow, or will this do damage? Will blow lines out when off, and adapter, still no help with diagrams for gasket install, cannot tell yet what happened to the ones I put on, cannot see up there yet. Thanks for the help.

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Wednesday, March 7th, 2007 AT 4:40 PM
Tiny
CHEVYII
  • MEMBER

Everything sounds fine for now. Do not blow 120 psi just bump it and see what happens. Let me know on the gaskets and seals.

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Wednesday, March 7th, 2007 AT 8:40 PM
Tiny
STEELWEELS
  • MEMBER

Okay, still working carefully here to take this apart. Can you help with how the gaskets go? Called GM and two Chevrolet dealers, either they do not want to help or they cannot. I do not know. I am sure they just want me to take it in. I cannot afford that right now. Called some small shops around here and they do not have the techno, I do not know how they could fix it then. I need a darn diagram or breakaway of this little monster, as far as putting it back together.

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Wednesday, March 7th, 2007 AT 9:08 PM
Tiny
CHEVYII
  • MEMBER

Go figure. I cannot pull a diagram either and I have GM software.

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Wednesday, March 7th, 2007 AT 9:28 PM
Tiny
STEELWEELS
  • MEMBER

So how do I know how to install these correctly? To make sure I have the right ones and where they go. Also, it says to make a donation, but how do I get the money to you for the help?

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Thursday, March 8th, 2007 AT 11:52 AM
Tiny
CHEVYII
  • MEMBER

Are they gaskets or o-rings?

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Thursday, March 8th, 2007 AT 1:20 PM
Tiny
STEELWEELS
  • MEMBER

This kit has two small rubber o-rings (probably for cooler lines). One large rubber o-ring (maybe for adapter to block seal) two black paper gaskets. One has like metal sandwiched between paper (for top of screen or filter inside the adapter). One just made of paper. I installed the first time around, the gasket with the metal and the large o-ring. This is a victor reinz set part number GS33272, this is what my NAPA dealer said is the same as a FELPRO es72671.

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Friday, March 9th, 2007 AT 8:31 AM
Tiny
STEELWEELS
  • MEMBER

Or maybe this will help.


http://www.2carpros.com/forum/automotive_pictures/60891_oil_cooler_1.jpg

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Friday, March 9th, 2007 AT 9:36 AM
Tiny
CHEVYII
  • MEMBER

I think only one of the large gaskets are used. The o-ring is a block to adapter seal.

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Friday, March 9th, 2007 AT 11:04 AM
Tiny
STEELWEELS
  • MEMBER

First, I was "new to forum" not it states "tech level one". What does that mean? All parts are off, paper gasket with metal middle (Oreo cookie style) was still intact, large rubber o-ring (adapter to block) had small tear on one side (my fault) after taking adapter off, found an o-ring recessed in adapter, but it looked like a square type, or is this what happens to the round one after mounting? Because this is sloppy in the groove. Blew out adapter and lines to radiator, no blockage, but cannot find rest of pieces from old gaskets. Could they have made it to the pan or radiator?

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Saturday, March 10th, 2007 AT 9:12 AM
Tiny
CHEVYII
  • MEMBER

Your leak was probably from the large o-ring. As far as the other gaskets it probably went into the filter. Use some oil on the o-ring this time.

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Saturday, March 10th, 2007 AT 9:20 AM
Tiny
STEELWEELS
  • MEMBER

Looking at the lines to the adapter, these have the screw on threaded type fittings, not the plastic snap clips, there were no small o-rings on these fittings or in the adapter. Should I install these two? Was debating about putting form-a-gasket on the adapter, but if you say to only use oil (like the oil filter), that is what I will try. Still scratching head about possible over pressure. Do not want to do this again, but we figured this was the only way to see what is going to happen. This is wife's truck, and do not want her and the kids stranded or a blown engine, you know how women are.

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Sunday, March 11th, 2007 AT 9:05 AM
Tiny
CHEVYII
  • MEMBER

Check inside of the adapter where the lines go and see if there is a void where the small ones go. As far as the pressure, is the PCV system okay?
Jim

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Sunday, March 11th, 2007 AT 9:09 AM

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