What's the best cheap thing you did to your 1st gen.

ok, I haven't thought about this in a while.....yes, you're doing what everyone used to do...I think. Except the PCV now stays closed because...no vacuum. Just do away w/ pcv (we used to gut them) and hang a hose down. Then put breather on the other side.(you did)

Still just vented though with no positive pressure. Watch your cams and see if they start getting gummy.


Remember the 'sludge' Camry engines of the late '90s? Bad PCV system. And that was with 'good oils'.

 

It was my understanding that vacuum comes from the PCV side, and the valve prevents oil from being drawn into the manifold. The replacement air is drawn from the breather side with its connection at the intake - taking in filtered air before the throttle body. Either that or expelling oil into the throttle body as the system is not perfect.

 

yes.....you said you did away w/ that and hung hose down. There is no 'drawing air' w/o vacuum. It's just vented. Watch it close.....just don't sludge it up.

 

I left the PCV side intact

 

to the intake? that's the vacuum.

 

wish I had a camera. I left the PCV valve and its connection to the intake manifold intact. I removed the CC breather hose at the back of the air intake pipe and put a filter on it.

 

There's nothing to gain bypassing filtered air and putting another filter on inlet side.

 

except for not getting oil in your throttle body.

 

Remember back when talking about the Jeep? They didn't want oil in intake....thus taking off PCV and putting hose off it.

 

That's backwards. Oil goes in intake (manifold). Air tube goes OUT to valve cover. You have oil in there then you have blow-by.

 

they didn't take off the pcv. they took off the CC breather hose and put an end filter on it. Same vacuum, the makeup air comes from its own source though.

 

People did away w/ PCV to get rid of oil in manifold and fouling plugs.

 

why? Oil shouldn't be there.

 

The system runs in reverse sometimes at less than wide open throttle when vacuum pressure is greater at the intake side then the pcv side. thus oil in intake.

 

correct....you're right....but oil shouldn't be making it's way UP a tube unless crankcase is pressurized overcoming vacuum.
ie: rings letting too much pressure OR intake plugged so much it can't suck hard enough to clear everything out PCV.

 

ok, I'll go for that....just watch out for sludge. The 3.0 had a poorly circulating system and it was BAD for everything. Stuck rings. Carbon burned on cams....bad.

 

I don't think there's enough vacuum from the PCV's connection at the manifold to cause enough vacuum from its side down thru the crankcase to the other side to overcome intake vacuum at all throttle positions so its drawing air and oil from the unvalved breather side.

 

It was especially bad on my 4.slow as there is only one valve cover and lots of oil ended up in the unvalved connection. When the cycle runs in reverse at less than wide open throttle positions the intake should be just drawing in vapor. But if you look in your throttle body, intake pipe, intake manifold and there's oil...

 

hmmmm, this sounds good on paper. I really don't see my throttle get that dirty so I dunno if you may have another problem.

And after replacing many sludged engines, I wouldn't mess w/ it. I'd rather burn the stuff off than it sit around gelling. Toyota blamed infrequent oil changes but they changed the design pretty quick after replacing a lot of engines.

 

Actually, vacuum should be strong at < WFO at intake manifold.