Oil lines to oil filter assembly leaking.

Patrick · Post by **Patrick** » Wed Jan 08, 2003 1:00 pm

My oil lines from radiator to oil filter just started leaking. Is this a known problem with 2001. I recently changed to synthetic oil. Truck has 18,000 mls. Just want to know if the oil is causing them to leak or is it a problem with the lines. Thanks.

a2b · Post by **a2b** » Wed Jan 08, 2003 2:24 pm

yes, mine did too from the dealer. just take it in to the dealer and they will fix it

Post by **HenryJ** » Wed Jan 08, 2003 6:59 pm

Yes, it is a known problem.

The story as told to me , by a GM parts guy I trust :

The original supplier of the oil lines failed to calibrate the pressure settings on the crimper and they were over crimped.

Since that time they have changed suppliers.

The old style lines (prone to leak) had two rings of indentations which required more hydraulic pressure on the crimp to hold the hose, which resulted in crushing the hose if things were not just right.

The "New and improved" lines have three rings of indents, which require less pressure on the crimp and less risk of crushing the hose.

Watch the set that hasn't been replaced yet, if they don't replace both sets at the same time.

Look for even a little seapage near the crimped hose and have them replaced with the new style if you see a leak.

P.S. they really make a mess too, but don't let an overzealous tech steam clean all the frame coatings off to clean it up!

a2b · Post by **a2b** » Wed Jan 08, 2003 7:05 pm

nice info brule. i think i need to make a page for that too!

quickbiker · Post by **quickbiker** » Thu Jan 09, 2003 6:44 pm

Yea, good info. Mine are leaking again, but it's from the washer seals. I did have it stopped for about 14k miles, now at 33k, it's leaking again. Maybe if I used 2 washer seals per line? Oh well. Maybe I can take it to a dealer that will cover it.

The dealer didn't fix it the first time, so I did, but now leaking again.

quickbiker · Post by **quickbiker** » Mon Jan 13, 2003 3:05 am

I looked yesterday, and all mine already have the 3 crimps. I've never had problems with the crimps, only where the line block thing screws onto the adaptor, where there is one bolt and 2 washer seals. Seams it never wants to seal correctly. I'll have to find a thinker washer or maybe double up to take up warpage. That's all I can figure is that it's warped.