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Username Post: Bypass oil cooler?        (Topic#228755)
shopguy 
Forum Newbie
Posts: 89

Age: 38
Reg: 04-20-09
10-31-09 04:57 PM - Post#1797446    

I just got a reman. engine today, long block. For my 93 Sub K1500. Drove up to Phoenix to pick it up. The owner told me I should replace or bypass the oil cooler, and said that they always just bypass it. I'll call him and ask him if I have more questions, but thought I'd try here also.

What are your thoughts on bypass vs replace? A replace would mean a new radiator, or adding an extra unit. My current radiator isn't stock, the guy who owned it before me got a larger radiator by mistake (for a big block I think) and it has the cooler built in. It is in good shape though, except a crack at the upper water outlet which I'm pretty sure I can repair myself with solder and my propane torch. It doesn't fit perfect, but the bottom mounts are good and the guy mounted the shroud okay, so I'm pretty happy with it.

The engine guy said I should just get a screw-on oil filter adapter and that would "bypass" the cooler. Is this what I need?

http://www.autozone.com/autozone/catalog/part s/par...

(hope the link works -- it is a "Melling / Oil Filter Adapter" from AutoZone)

Does that end up blocking the holes for the existing oil cooler line, or do I need plugs for those? Sorry if this is a dumb question, but it has been a couple months since I took the engine out and I don't recall where everything was

I do use it for towing, and usually up mountain roads, since that is where the fish are. I live in Tucson, AZ, so it is hot as hell. If that makes a difference in the "need the cooler" debate.

The old engine was full of nasty slug, so for sure I will at least replace or bypass the cooler, no way I'm letting that nasty junk back in my new engine.
-Eric
1993 Chevy Suburban K1500


 
Low priced Genuine GM Auto Parts
boogie 
Senior Member
Posts: 2141
boogie
Loc: Louisiana
Reg: 07-11-02
10-31-09 05:11 PM - Post#1797452    
    In response to shopguy

I would bypass it. All you need is GM part# 3952301(adaptor) and (2)GM part# 3951644 bolts. That will take the place of the exsisting oil filter adaptor for the cooler lines.
'85 GMC C1500 SWB 355 sbc


 
355Cheyenne 
Senior Member
Posts: 3765
355Cheyenne
Loc: Northern MN
Reg: 10-27-04
10-31-09 06:27 PM - Post#1797492    
    In response to boogie

make that 2 votes for blocking it off.
98 Silverado k1500 4x4 350


 
shopguy 
Forum Newbie
Posts: 89

Age: 38
Reg: 04-20-09
10-31-09 09:06 PM - Post#1797580    
    In response to boogie

Regarding the bolts. When I've rebuilt vehicles in the past I've always used Grade 8 bolts from Ace Hardware (Lowes has them now also). I even used them for head bolts a couple times. Never had any problems (that I contribute to the bolts), but someone that I trust pretty well recently told me that I must be really lucky and that I should always buy the specific bolts for the job. Where is an average person supposed to find the "specific bolt for the job"? If I walk in to any of the parts places around here and ask for most of the bolts I'm looking for, they'll look at me like I'm crazy. Unless it has a special head, or maybe flywheel or head bolts, they don't list that type of hardware in their computers.

I could order them on-line, but then I'm waiting around for a few bolts, ugh.
-Eric
1993 Chevy Suburban K1500


 
boogie 
Senior Member
Posts: 2141
boogie
Loc: Louisiana
Reg: 07-11-02
11-01-09 06:13 AM - Post#1797660    
    In response to shopguy

What bolts are you talking about? The part# I gave you for the oil filter bolts can be found at the Chevy dealership. You can also rob these off any Chevy V8 dating back to the 60's.
'85 GMC C1500 SWB 355 sbc


Edited by boogie on 11-01-09 06:18 AM. Reason for edit: No reason given.

 
shopguy 
Forum Newbie
Posts: 89

Age: 38
Reg: 04-20-09
11-01-09 08:55 AM - Post#1797737    
    In response to boogie

Thanks, I'll check the dealer for these, hopefully they have them in stock. The dealer is about 10 miles from my house and open weekdays only, and the hardware store is less than a mile and open weekends... but I guess, for any engine bolts, I'll make sure I get the exact bolts for the job. I can't see myself going to the dealer anytime I need a bolt though, but I will at least for anything inside/on the engine.

I guess if the hardware store had "black oxide coated steel" bolts, that would be acceptable, but they don't, at least not in my area.
-Eric
1993 Chevy Suburban K1500


 
wdshea 
Contributor
Posts: 140

Age: 30
Loc: Austin, Tx
Reg: 10-20-09
11-01-09 11:48 AM - Post#1797809    
    In response to shopguy

if the engine is equipped with an oil cooler, why would you want to bypass it?

further more, if it is unnecessary, when would you want the oil cooler?
'91 Cheyenne 350 4x4 5 Speed


 
shopguy 
Forum Newbie
Posts: 89

Age: 38
Reg: 04-20-09
11-01-09 01:14 PM - Post#1797847    
    In response to wdshea

I don't know, that's why I'm asking. I've heard from 2 pros (engine rebuilders) and pretty much everything I've read says they are not needed. Not sure why Chevy puts them on, could be a marketing thing maybe.

If it was in good condition, I wouldn't remove it just for the heck of it, but it needs to be replaced if kept. I just ordered the oil filter adapter, so guess I've decided. At least I know it won't void my engine warranty, since the rebuilder is one of the people who told me to bypass it.
-Eric
1993 Chevy Suburban K1500


 
boogie 
Senior Member
Posts: 2141
boogie
Loc: Louisiana
Reg: 07-11-02
11-01-09 01:28 PM - Post#1797854    
    In response to wdshea

  • wdshea Said:
if the engine is equipped with an oil cooler, why would you want to bypass it?

further more, if it is unnecessary, when would you want the oil cooler?



To get rid of all the potential leaks and crap in the way. Millions of engines have survived without them.

In severe heavy duty applications where oil temps can run at the top or above their operating range, an oil cooler is needed.
'85 GMC C1500 SWB 355 sbc


 
355Cheyenne 
Senior Member
Posts: 3765
355Cheyenne
Loc: Northern MN
Reg: 10-27-04
11-01-09 08:10 PM - Post#1798096    
    In response to wdshea

  • wdshea Said:
if the engine is equipped with an oil cooler, why would you want to bypass it?

further more, if it is unnecessary, when would you want the oil cooler?



Like Boogie said. For average day to day use, it isn't going to make a difference. There have been more motors with out the oil cooler in the past then there has. They are known to start leaks on the hoses and so you are introducing a more complicated structure for little gain. I do agree that in HD applications where there may be heavy towing etc. that an oil cooler could extend oil life, but I also have the opinion that you could just as well do away with the oil cooler in HD applications and just change your oil a little more frequent.

I made the suggestion to block it off because I was under the assumption he needed to replace the lines and the radiator if he were to keep it. Considering the expense and all forget it, but if everything was there and fully functional I would just hook it up, but those lines are worth a small fortune and dont get me started on a new radiator...
98 Silverado k1500 4x4 350


 
Low priced Genuine GM Auto Parts
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