Who here has installed an oil filter bypass plug, so that all of the engine oil is forced to go through the filter. Im thinking of doing this when I change my oil soon, but would like to hear who has done it and whats your experience with it. I know that the car will need more time to warm up the oil, so that the oil pressure isnt sky high when you first drive off. Since removing my restrictive factory oil cooler, my oil pressure has ben about 10 to 15 psi higher. Any thoughts?



Nick

 

No one out there has done this?




Nick

 

here's a bump

 

oil starvation is worse than dirty oil... at WOT do you really want all your oil getting backed up through the restrictive oil filter instead of through the engine where its needed?

 

Thats what I was thinking.

 

How would this cause the engine to starve for oil? The oil filter pressure relief valve is there in the event that the oil filter becomes clogged, and oil cannot pass through it. Unless you change your oil filter every 50,000 miles, I dont see that happening. In the event that your oil filter does clog and this bypass has to do its job, I think it will be already too late for the motor. Also, from what I have read, is that this bypass opens at less than 5 PSI of pressure. If you dont know what I am referring to, next time you change your oil, and drop your filter, look next to where your oil filter screws onto, you will see the valve. You can actually push it in with your finger to see how light the tension on the relief spring is. By plugging this, ALL engine oil will be directed through the filter, before being circulated through the engine. Im sure someone must have done this and have experience with it. I would like to hear from Injuneer Fred, RSKrause, or other guys that run some hi - po setups to see if they have this mod done to their oiling system, or to hear their thoughts on it,



Nick

 

Delco filters have their own bypass valves and I would assume most others do also. I was under the inmpression that the stock valve would open before it was needed. Mine is gone if that helps you any.

EDIT: Doh! Beat me to it. Just verification I guess.

 

No, filters do NOT have a bypass in them, at least not for chevy engines. The bypass is in the filter adapter/block. The bypass (in the filter adapter) opens at appr. 10#. The testing I did, revealed about 10 1/2#. The reason for the bypass being set at that pressure is twofold. Yes, for those that do not feel the need to change filters, it comes in handy. But even with the high flow capacity of the delco ultraguard filters, the bypass is needed (if oil flow thru the block passages is important) upon cold startup. The more restrictive the filter, the more important the filter bypass becomes. No, I'm not referring to 20* below zero. The initial startup will utilize the opened bypass to get the oil to the engine, which is more important than filtered oil.

The filter bypass is not opened with oil pressure per sa. Contrary to popular belief, it is opened when the pressure DIFFERENTIAL is (in the case of oem chevies) greater than 10#. IOW, the differential of what is going in, and what the resultant pressure that is coming out. The more restricting the filter, or the thicker the oil, the greater the differential. Like I stated, the bypass is needed, even with the ultraguard. How does your filter compare? To give you a hint, not many filter mftrs. will offer that info. More wear is induced with cold engine startups than while in operation at operating temps. Why aggravate the situation, by restricting the flow of the oil?

http://www.acdelco.com/html/pi_filt_oil_gold_flow.htm

 

I heard filters did have bypass valves from a few other guys from another forum and found this on Delco's site:

An ACDelco Oil Filter helps protect your engine in many ways:
Excellent filter capacity, enhanced efficiency, consistent flow management and high durability make these oil filters among the best you'll find
Tight seals prevent unfiltered oil from entering your engine
Consistent, dependable oil filtration throughout the filter
Antidrain back valves retain oil in the filter for quicker engine lubrication during start-up
By-pass valves help keep the engine from becoming oil-starved during cold weather starts or if total filter blockage exists

http://www.acdelco.com/html/pi_filt_oil.htm

 

dirty oil through the motor is much much better than not enough clean oil.

 

Talk about straight up cheese. You took that from the website Maybe you should talk to AC Delco about becoming an ad campaign manager.

 

I stand by my previous post, regardless of anyone's interpretatin of wording on the delco website! Does the wording need to apply to chevy engines? BTW, you made reference to the anti drainback valve, with wording stating it helps retain oil in the filter. Oh? In what position is the installed filter on the LT1? Now tell me the website wording applies to the sbc.

 

I was simply showing you guys what I read from delco, not saying any of you were wrong. I now completely agree with you arnie, I guess the site doesn't reflect all delco filters. I hope the "Consistent, dependable oil filtration throughout the filter" comment holds true for all of them though.

 

don't use the 99 cent special oil filter, use any kind of oil and change it every 3000 miles, and your not going to have any problems. simple, eh?

 

Worst....comment....ever.....