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OK - This was on another website tonight. Who here pre-fills their oil filters?
I see the importance of it on a first start-up but after the engine has been run and broken in, does it really make much difference? Even at the first 500 mile oil change? I'm talking routine oil changes, not drain the oil and refill next week.
I do it whenever I change oil. Less time to build oil pressure after an oil change. I only do that for the race motor with stiff springs and solid rollers. Not as big a deal for milder build... Never did it for my drivers.
-Chris
The question I have is how long does it take the oil pump to fill the filter and start the supply? I would think anything you can do to shorten this time would be a good thing. How long does it take to prime the filter? I have been doing it ever since it was explained to me. Made sense!
I just fired my 454 up after it was sitting for 7 years. After all the prep work I changed the oil and filter. I filled the filter up first I heard that tip also recently.
Richard
I always fill the filter on a oil change.
If the filter goes in staight up there's no problem filling it, like on my wifes new Caliber. But if it goes in say at an angle , you can put some oil in but I wouldn't fill it.
My F350 - just about horizontal, the Escape needs to be screwed around some other parts and is just about horizontal as well. The '31 is horizontal and it needs to be threaded past the steering, fuel line and a header. No I don't/can't pre lube the filters :o
I have never pre-filled filters on drivers. On the '33's new engine we pre-filled before priming the system, but that filter only holds about 1/2 quart or less so fill time would be pretty quick.
Same here. I always prefill them, only because that is what I was always taught and what I heard. It just seems to make sense that there is less wait time for the filter to fill and start lubing the rest of the motor.Quote:
Originally Posted by sunsetdart
Don
If easy, I would fill the filter (via the outer holes).
These are tiny engines with high oil pressure tho. Larger engines, we need to pre-fill them, prelube the motors, and blow down the cylinders before starting.
I do like the one system we have on cat gensets.... you can change the oil/fuel filter and fill it with filtered fuel while the engine is running.
A friend of mine way back in the 70's put a kill switch on his SBC Nova. He would crank the engine until the oil pressure gauge moved. Then he'd hit the kill switch which would energize the coil & electric fuel pump. I often wondered how many starters he went through?.....:LOL:
does the oil go thru the filter before it enters the engine or go thru it after it has oiled everything ?
Every one I have ever seen goes through the filter first so the bearings get clean oil.
Don
Hoss, I've only ever seen filter first.
to avoid oil starvation there is normally a bypass if the filter is clogged. Sometimes a problem on REALLY cold thick oil tho as it bypasses on startup.
How many revolutions does your engine make before it has circulated oil thru it? Depending on where your sending unit is mounted and wether or not the engine is warm. If your idle is 750 and the engine is warm and there is a 2 second delay (12.5) revolutions.
Now I have a new question. Is the oil sending unit generally on the inlet or outlet side of the filter?
outlet side. SBC's have 2 places, one at the top and one by the filter. At the top is the truer reading.
Quote:
Originally Posted by sfort
Ever since basic autoshop in High school, I have always put a little oil in there(about half full so it doesn't drip out when you tilt it to put it on!) Our shop teacher, Mr. Spellenburg, would always say, lube the rubber gasget with some fresh oil, and then pour some in there on the threads!. It helps getting them off a heck of a lot easier!
when i was at the boat yard they had a run of oil filters that were put on dry and very tight you would crush the can and still not get them to move the next was drive a big screw drive thru the oil filter that would rip the tin can off and not get the filter off and have oil mess in the bilge some of the engines if filter were on the block could be a real deal as you could not get close to the filter to get at it .i had one that got me so mad i thru my oil filter wrench in the river . as all it did was slip i would wear out the band typ filter wrench on some of them boat filters some would come off but the last one had two sbc and had to move one engine over to get the other one out. as the hole in the deck was in the middle of the deck and only the size for one sbc this was covered by warranty to pull the engine to get the oil filters off :D i allways fill the filter and alway oil the o ring . but first check there is no old O ring stuck on the block still . even if there one on the old filter :3dSMILE:Quote:
Originally Posted by stovens
Hoss
I have done some dry sump systems on my race cars that filtered the oil on the way out of the engine to the tank and ran unfiltered back to the engine oil circuits---Clean oil into the tank, clean oil into engine, filtered il to tank, kept tank clean---no pressure drop thru filters, no bypass of unfiltered oil---
Hmmm interesting... It certainly makes sense to pre-fill if possible. One is in upright where the other is horizontal. Both of these vehicles cost less than a good set of heads though. :LOL:
Quote:
The oil supplied to the pump makes its way through a full-flow oil filter into a 1/2 inch main gallery on a small block. The main gallery is positioned above the camshaft. The lube travels from there through a hole to the groove situated nearby the rear side of the rear cam bearing. This is the position where the lifters and rear main are oiled. The four front cam bearings have grooves that pass to each individual main bearing. Oil passes down into the crankshafts main journals through tiny holes in the upper main bearings. From the main journals it travels to the rod journals.
yeah fill as much as mounting angle will alow and a smear on the gasket too. the theory makes sense but if its actually useful? i dont know.
I was also told by some random bloke passing by told me if you open a radiator cap when the engines warm-new style with the recovery bottle cap not on the actual radiator- with the motor running that it will depresurise and not flow over with the pressure. i tried this method and guess what-didnt work!