Oil cooler line leaking at filter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**rs74** · 08-09-2013, 06:30 PM

I am working on the old body style 99 extended cab with the 5.7l. The lines are leaking where they connect to the filter housing. There seems to be no orings when I look at the schematic. There is only the plastic clips and the fittings that screw into the filter housing. Is the connector clips usually the culprit on these or what. The lines are still in and have not been taken apart yet. There seems to be issues with these lines on alot of different GM vehicles but not sure what the fix is on them.

**Boog** · 08-09-2013, 09:57 PM

It's a very common problem. The fix is to replace the lines. If I remember right the seals are plastic, nylon like rings. I don't remember them being available separately.

**rs74** · 08-09-2013, 11:14 PM

I was wondering if we were going to have to do that. Just didn't know if maybe it could have been the fittings that go into the filter base or maybe the clips could be replaced.

I take it that the new clips come with the new lines then?

08-09-2013, 06:30 PM	#1
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Oil cooler line leaking at filter I am working on the old body style 99 extended cab with the 5.7l. The lines are leaking where they connect to the filter housing. There seems to be no orings when I look at the schematic. There is only the plastic clips and the fittings that screw into the filter housing. Is the connector clips usually the culprit on these or what. The lines are still in and have not been taken apart yet. There seems to be issues with these lines on alot of different GM vehicles but not sure what the fix is on them. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

08-09-2013, 09:57 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 14,116	Re: Oil cooler line leaking at filter It's a very common problem. The fix is to replace the lines. If I remember right the seals are plastic, nylon like rings. I don't remember them being available separately. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver 'primer is finer' Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

08-09-2013, 11:14 PM	#3
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: Oil cooler line leaking at filter I was wondering if we were going to have to do that. Just didn't know if maybe it could have been the fittings that go into the filter base or maybe the clips could be replaced. I take it that the new clips come with the new lines then? __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie



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