I have a 1992 Integra with a b20 swap. In the past 5 months I have gone through 3 oil pumps and 1 motor. When I push in the clutch the rpms drop and sometimes my car will die. Occassionally my oil light will flash on and off and yes - there is oil in the motor. I have 0psi at idle and its low otherwise. Its a stock b20 with about 30k on it. Could it be because I have an LS crank pulley? Please give any input! Thanks

 

The crank pulley shouldn't matter I have my original 91 LS pulley on my GSR engine with no issues.

Here's a wild *** guess... Could a clutch or flywheel that's out of balance cause enough vibrations to kill oil pumps?

 

Someone else said that to me too so I guess it's a possibility but I dont want to replace my clutch and flywheel and continue to have the same problems but thanks! I think thats what Im going to end up having to try

 

A crank pulley would also cause it to be unbalanced because there is quite a big size difference between the LS and the B20 crank pulley...

 

Any more ideas? Help me

 

your installing the oil pumps wrong, you need to check the clearance all the way around the crank and main end seal, it should be .0002 or .002 all the way around.

 

this last post seems to be the most likely answer to the problem, I would check that first

 

But when I put a new oil pump in it runs fine for about 2-3 months then goes bad. If that was the case wouldn't I have low oil pressure right away?

 

no and they run fine for 2-3 months because your using new seals, trust me your installing the pump wrong. buy a buy one with new seals an install it correctly checking the clearances all the way around the end main seal and crank.

happy hunting.

 

ummmm.. can you please explain HOW you can install it wrong? that doesnt make any sense, as it ONLY bolts in 1 way...

and checking the clearance, and finding out that its wrong, would NOT indicate that the pump was installed wrong.. It would point to something else.. like maybe crank walk or something..

But yeah.. please explain how you do it wrong, as you CANNOT bolt it on backwards, etc..

So, lets say you check your clearance? If its off, what then? how do you install it RIGHT?

Im not trying to be a di*k.. i just dont see how that can happen

 

to me, your motor sounds out of balance.. whether it be the crank or the flywheel/clutch...

what EXACTLY breaks on the oil pump? is it getting clogged up? pulley breaking off? what is the damage to the pump, and that will help answer your problem...

That REALLY sounds like your clutch/flywheel being out of balance.. I would suggest, before you end up throwing a rod from lack of oil, taking the motor out, rechecking ALL bearing clearances, tolerances, and end-play of your crank.. and then take it to be balanced correctly.. i have seen pics online of people actually snapping crankshafts from being out of balance

 

crank pulley would have be wildly out of balance to have any effect on the crank whatsoever, and more then likely you would damage bearings before the oil pump. Cars dont use harmonic balancers anymore they use harmonic dampers, 4 cylinders especially, are balanced via the rotating assembly on the inside of the engine. There would need to be wild fluctuations in the balance of either the flywheel or the crank pulley.

 

Bump

 

bad thrust washer?

 

My boyfriend says thank you DJYoshaBYD lol

 

There is nothing visibly wrong with the oil pumps - just low or no oil pressure

 

lol.. oooo k.. i dont know what i did, but your welcome...

if you cannot see anything visually wrong with the pumps, then it may be another issue... i mean, does the gear on the pump spin with ease? Was the b20 recently rebuilt?

Try taking the oil pan off, and checking the pick-up for the oil.. the thing with the screen the dips into your oil pan to suck up oil.. that may be clogged or something..

Also, if you can, pull your valve cover, and check under a couple of the cam caps for damage to the journal (bearing surface), as the lack of oil could have caused damage to internal components...

Now, you say you have replaced these oil pumps a bunch? Now, when you replace them, does it fix the problem perfectly, and then after a while, it does it again, until it completely fails?

 

Yes the gear moves fine and theres no wear or anything..
I spun a rod on my b20 about 4 months ago because the oil pump went out but I continued to drive it because I didnt know what the problem was at the time. So I bought a new b20 from tigerjapanese and put it in my da..It ran fine for about a month then the oil pump went out again. So I replaced it and cleaned the pick-up screen and it ran fine for about 2 months...until now. So yes, when the oil pumps are replaced it runs great. So I guess it's either the crank pulley, flywheel/clutch, thrust washer or just an unbalanced motor? But I dont know where to start...I dont want to take my motor to the machine shop for no reason...or replace anything I dont need to..

 

if theres no physical damage then it isnt anything to do with balance, but just to be safe id take the rotating assembly and have it balanced at a machine shop.

 

What does the wear/damage to the oil pump have to do with my motor being unbalanced? So if it was unbalanced the gear would be damaged...?

 

My friend ran into a similar issue when he installed a CTR Pulley on a NON-VTEC car. Now the difference in non-vtec motors and vtec motors is that the vtec motors are BETTER BALANCED. Non Vtec Motors pulley's feature a rubber insulation that dums down the vibrations, CTR Pulley's, or Vtec motors don't really benefit from it because the motors are better balanced but when you do install something like a CTR Pulley onto non-vtec motors, USUALLY the Oil Pump is first to go..

So perhaps the pulley you have on your motor is incompatible in that way, or perhaps the problem is stemmed from their...Vibrations at the pulley will Burn out Oil Pump gears in a SHORT TIME...I'd look into it and make sure the Crank pulley you have for your car is the one thats supposed to be on there. Not common to find that, they CTR Pulley is light as all hell and doesn't accomidate Power Steering and AC Compressor belts so their a logical choice but still, some people don't fully think before they put it on.

 

even though your engine has low miles on it, i heard that having the wrong clearances on the main bearings could cause the crank to sit slightly differently causing undo stress on the oil pump by 'weighing/pulling it down' persay.

just my .02

 

It's a LS crank pulley on a B20B motor

 

what does your oil pan look like. Had a friend with a customer with a beat up oil pan where the oil pickup was being blocked by the pan itself. Killed one engine and 2 pumps.

 

so yeah.. when are you going to pull your oil pan off and look at it? stop speculating and take it off and start checking ****.. again.. you cannot install the oil pump wrong, so it has to be with the oil pickup.. at least that is where id be looking