runnerfreak88

ok so replaced the pcv valve hose in the back with an air filter and the one in the front by the oil cap too, but now the front blows oil from it not alot but enough to get a thin coat oil all over my engine. I have seen people do this before but is it suppose to loose oil? im perty sure not. by the way it doesn't have a pcv valve on the front one and i don't think it is suppose to but im not 100% sure. does any one know how to fix this?

87toy.

called blow by, getting to much air will do this, what kind of filters are u useing? do u have a pvc valve on the rear?

runnerfreak88

ya have a pcv on the rear the filters are just some cheap k&n knock offs from auto zone. not quite sure why it does have so much pressure becuase it runs like its new its a very strong engine thats why im not worried about it being blow by because it wouldnt be running very well

87toy.

umm.... i had a vw motor rebuilt a few years ago and after a few hundred miles i had this happen, turned out to be bad rings and it ran great, for awile. but thats a old vw motor.

runnerfreak88

well i guess time will tell not to worried though never uses oil so im sure iv got good rings

thook

I hardly had to add any oil nor did my 22re ever smoke, but the rings were so encrusted with carbon I had some pretty decent blow by......after about 210k miles was when it started.

runnerfreak88

ill have to try some sea foam see if that does anything cool thanks

thook

Try if you like, but I'm afraid it won't. Seriously....I've tried a number of things. Auto-RX and Seafoam included. Carbon is resilient stuff.

toytech76

BG makes a engine flush kit. It contains a quart of flush that you dump in the eng and let the eng idle for an hour. Then you change the oil again and put in an additive. It actually works pretty good

apalmer1

you can have an engine run smooth and evenly and still have excessive blowby. The thing that makes an engine run like crap is uneven compression, if all cylinder have low compression it will still run fine just have less power. Do a compression test, dry and wet. if your compression doesnt increase considerably with oil in the cylinders on the wet test then you have found your problem.

thook

Yeah, but the compression test won't say anything for bad oil rings. They have nothing to do with compression. That's my understanding of it, anyway.

apalmer1

compression tests have everything to do with rings. When you do a wet compression test you squirt oil into the cylinder. The oil takes up volume in the combustion chamber, and so the compression should be higher than it was doing a dry compression test. If the rings are warn the oil will seep past the rings into the crankcase and you wont see much of an increase. This doesnt just pertain to the oil controll ring specificaly since the compression rings are designed to contain the air fuel mixture in the cylinder, which is obviously much less dense than oil.

toytech76

You kind of have it backwards. If the top 2 rings, which are the compression rings, are worn, you will have a large increase in compression if you squirt oil in the cyls. There will be very little if any increase if your valves are bad. Oil in the cyl's will not tell you if the oil control rings(bottom rings) are bad or not

runnerfreak88

see thing is its still very powerfull have 94 runner with bad rings that takes for ever but i can go up free way hills going 70 still in 5th gear. have beat a couple 2.7's lol. its just a very strange thing

thook

You can have good compression and still have leaky oil rings. Not so strange.