had a guy come into work with a filter leaking on a 6.2. the filter was a off-brand of puralator. had been leaking around top of filter where meets block. while looking at it I noticed the oil cooler lines blocked off. could this be a issue with the filter starting to leak?

anybody got input on this?

Not an issue, depending on the series - the oil cooler was originally used in the 2500HD and 3500 trucks, optional in the 1500 series.

However, at this point, any truck could have any engine, as replacement.

Iirc, a bypass is incorporated for event of restricted flow to or from cooler - flow is from pump thru cooler to filter, or bypass directly into filter.

What year 6.2 would help, some of the later 6.2's that were placed in 88+ new body style trucks have oil filter adaptors that place the oil filter sideways, the seals on the adaptor leak. As far as an oil cooler I've never seen a 6.2 that didn't have an oil cooler from factory. Every 1500 I've driven or popped the hood on was equipped. The oil cooler could have been bypassed though or just blocked off. This isn't a good idea but there is a bypass in the the oil filter mount that is for this.

I have never seen or heard of a 6.2 that didn't have oil cooler lines. Most of them do develop leaks though. I would not run an engine with the holes plugged. It would be better to make a hose to go from one port to the other. Relief valves aren't made to be used constantly and don't flow an adequate amount of oil.:eek:

All diesel engines need an oil cooler if you work them at all. I installed an old 5.7 in a '71 Olds 98 Regency years ago. The radiator had no cooler for the engine, so I ran it without one. Just a passenger car. The was so hot when I drained it, it burned my fingers getting the plug out! A marked difference from the cars with coolers.

The engine developed wrist pin noise many miles down the road and, when disassembled, showed wear beyond normal. I always attributed it to the additional heat and my stupidity of not hooking up an aux cooler.

the sub was a mid eighties with a red engine in it, would a different brand filter stop this?

Original '82 6.2 engines were red - that's the high nickel block everyone looks for when building a 6.2.

WYSIWYG is the name of the game, now, where red paint is easily available for spiffin', foolin', or sniffin'.

You'd need to check that particular filter o-ring, and the filter surface on the block, to determine nature of leak.

Several filter manufacturers came out with bulletins about filter installation. "Screw it on too loose and it leaks, too tight and it won't come off" kind of info. I read one that stated something about the filter location being difficult to get the proper tension on the filter gasket without using a wrench. They advised to use the wrench on the filter with a rag wrapped around the filter body prior to putting the wrench on it. Grip the filter as close to the end (strongest part of the can) as possible to eliminate crimping/bending the can. Tighten the filter 3/4 turn after gasket contact.

If you install a filter, run the engine and it leaks, retighten the filter by hand and recheck. It should not leak if properly seated. The 6.2 uses the standard GM/Chev oil filter. Same one as a 350 Gas engine.