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Author Topic:   oil plug bypass
johnlj68
Dirt Full Roller

Total posts: 26
posted February 22, 2003 07:14 PM  
What are the advantages and disadvantages to plugging the oil plug bypass? Thanks, JJ

uforacing51
Dirt Forum Champ
Total posts: 570
posted February 23, 2003 02:49 PM  
never heard of a bypass in the oil passages. I think a bypass would steal a valuble asset from the motor, oil pressure!!

racinrich1
Dirt Full Roller

Total posts: 46
posted February 23, 2003 04:57 PM  
Could you be thinking about Oil restrictor?
They are used to limit the amount of oil to the lifter gallery when a solid cam is used..
Rich

ohiodirt
Dirt Full Roller

Total posts: 68
posted February 23, 2003 05:04 PM  
on a small block chevy there is an aluminum pressure relief-valve housing. it bolts to the block and that is the piece that your oil filter screws into. if you plug this bypass it ensures that all of the oil passes through the filter. there are pros and cons to this.
pros: all oil is filtered. no chance of contaminates getting by unfiltered.
cons: if your running alot of pressure it could burst your filter or seal on top of filter. if your oil is cold you might starve the top end.
smokey yunik always plugged them,so i'm plugging mine. anyone else have opinions on this?

Racer8c
Dirt Forum Racer

Total posts: 81
posted February 23, 2003 05:25 PM  
I plugged mine, I like ALL the oil filtered, and you're running when it's warm in the spring and summer anway, so I'd say the chances that the oil would be thick enough to starve the engine would be less, but that's just my opinion, I still like all the oil filtered.

BnBracin
Dirt Roller

Total posts: 19
posted February 23, 2003 11:11 PM  
I plugged mine. the only time it is used is on first start up and a plugged filter. It is a little extra insurance epecially when you need it.


uforacing51
Dirt Forum Champ
Total posts: 570
posted February 24, 2003 02:52 PM  
Oh geez yea, Mine is plugged. (he says with a red face)

rvanoussto
Dirt Roller

Total posts: 12
posted February 24, 2003 10:00 PM  
Plug it. I think if you don't the filter isn't doing much good. Never burst one yet.

One87Racing
Dirt Full Roller

Total posts: 68
posted February 24, 2003 11:26 PM  
I have an issue with the bypass myself. I broke my new engine in on saturday. It only made 35 psi throughout the break in, then when I dropped to idle, the oil pressure went to 0! I shut it off and changed the oil and filter and it came right back to 35 psi. I attribute the 0 oil pressure to a plugged filter (i use the napa filters. they are supposed to be made by wix). The engine is a 86 350 truck block i had tanked and new cam bearings installed (i checked to make sure all the oil holes lined up). The bearing clearances ranged from .002 to .0028 so I know there's not a problem with the crank and the block was scrubbed thoroughly after returning from the machine shop. I'm gonna change that bypass this week and see if i get 60 psi like I should have. any thoughts?

johnlj68
Dirt Full Roller

Total posts: 26
posted February 24, 2003 11:42 PM  
hey "one87racing" is that with bypass plugged off or open.

One87Racing
Dirt Full Roller

Total posts: 68
posted February 25, 2003 08:23 PM  
I guess I left that part out......oops. It's plugged.

armintroutracing
Dirt Full Roller

Total posts: 32
posted February 27, 2003 02:49 AM  
this was the best ten dollars i ever spent. i lost a cam 3 years ago. all i had to do was have my block cleaned and my crank polished. just be careful when your motor is cold dont over rev. if you have to start it during cold weather switch to a lite weight oil.

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