Author Topic: 22re crankcase vacuum to high. (Read 20857 times)

topkicktech · « **on:** Sep 19, 2010, 03:35:24 PM »

so wednesday i finally got the motor back in and running in my pickup. ran into a few issues one of witch has thrown me for a loop for the last few days. the motor is out of a 87 and so are all the controls. i bored the block 20 over and im running a engnbldr rv head. ive installed all new seals and replaced all of the cracking hoses. what i have going on is the truck will start and idle great. runs great to. after about 45 seconds of idling the vacuum in the crank case gets so high that you can hear this high pitch squealing noise coming from the front of the motor. the second you pull the dip stick out and release the vacuum from the crank case its stops reinstall it and it will do it again. ive been looking at thousands of vacuum diagrams and pics of peoples motors and from the best that i can see all my vacuum and intake stuff is hooked up propperly. i put my hand over the oil cap hole and a off the wall guess i would say that i have about 20-25" of vacuum in the crank case. thanks for any help.

Cheesemaker · « **Reply #1 on:** Sep 19, 2010, 06:00:11 PM »

Might want to give Ted at Engnbldr a call. I hear he is the man!! Outside of Marlin of course.

BoG-ToY · « **Reply #2 on:** Sep 19, 2010, 06:05:24 PM »

sounds like something ISNT hooked up right?
Let me go look at mine real quick, as I have an 87 sitting outside
it is a 22re right?

topkicktech · « **Reply #3 on:** Sep 19, 2010, 06:16:05 PM »

ya its a 22re out of a 87 4runner. any help would be great. ive sent him a email. waiting to hear back from him in the mroning. he is a wealth of knowledge.

79coyotefrg · « **Reply #4 on:** Sep 19, 2010, 07:20:59 PM »

dude, replace your pcv valve its stuck open

BoG-ToY · « **Reply #5 on:** Sep 19, 2010, 07:29:49 PM »

I would try what he said... lol

Cheesemaker · « **Reply #6 on:** Sep 19, 2010, 07:41:20 PM »

Quote from: 79coyotefrg on Sep 19, 2010, 07:20:59 PM

dude, replace your pcv valve its stuck open

I thought about that, but it didn't really sink in till Glen said it.

topkicktech · « **Reply #7 on:** Sep 19, 2010, 08:36:40 PM »

brand new. second one to be honest because i had a spare new one at my shop. ive double checked the operation. the check ball moves and seats.

BoG-ToY · « **Reply #8 on:** Sep 19, 2010, 08:45:17 PM »

did you check the flow of the intake line that hooks up closer to the throttle body? maybe if something was plugged up it would slowly allow the pressure to build up becuase of the PCV valve?

topkicktech · « **Reply #9 on:** Sep 19, 2010, 09:02:35 PM »

ive checked the throttle body the air intake pipe. air filter and filter housing. checked to make sure the maf trap door is moving. checked the ports to the intake and the hoses are new from toyota. if i put my oil crapy dipstick that leaks back in there is no problem. lol

BoG-ToY · « **Reply #10 on:** Sep 19, 2010, 09:10:38 PM »

yeah, NO, there shouldnt be a BUILDUP of vacuum like that. I wish I new.
it would almost mean that you are having this kind of vacuum build up IN the intake manifold?

topkicktech · « **Reply #11 on:** Sep 19, 2010, 09:26:48 PM »

i was trying to figure out if the butterfly is sealing to good. or if the idle air control is not working and its pulling from the crank case instead of the air intake im not sure how to even go about checking it.

emsvitil · « **Reply #12 on:** Sep 19, 2010, 09:43:29 PM »

There's two hoses that go into the valve cover (both same size diameter).

One is the PCV valve hose (rear), the other an intake for the crankcase (front next to front left valve cover nut).

The front hose connects to valve cover and intake manifold. Pull the hose off and put vacuum cap on manifold. There should be some air flow into engine from the opening in the valve cover.

crazykooter · « **Reply #13 on:** Sep 20, 2010, 07:28:52 AM »

If you remove the oil filler cap does it release the vacuum ? If it doesnt then the problem is in the lower end. The pressure your getting is not a bad thing since it shows good seal on the rings. Hense the squealing noise is the air is being forced out where it isnt suppose to.
Since you put the engine in how long have you let it run and have you driven the truck around ? Almost sounds like the crank case vents are plugged. Was this block hot tanked ?

topkicktech · « **Reply #14 on:** Sep 20, 2010, 07:43:55 AM »

ya when i pull the oil cap it releases to. the block was hot tanked. im afraid that its going to cause a seal to suck in and then start a leak. ive driven about 5 miles in one mile spurts. its ran about 2 hours total. is sounds so bad there is no way i can deal with the noise.

79coyotefrg · « **Reply #15 on:** Sep 20, 2010, 07:52:09 AM »

it has to be the pcv, nothing else will allow VACUUM into the crankcase.

if you know the pcv is new turn it over because it MUST be installed upside down.

even if you had a huge hole in a piston it wouldnt build vacuum it would build pressure.

crazykooter · « **Reply #16 on:** Sep 20, 2010, 07:58:18 AM »

Then your PVC is not releasing. be it that you have changed the pvc already it tells me that the problem is behind the pvc. Just a fyi PVC means positive crankcase ventilation. So it is your problem. I would take the hose off the pvc and manifold. Plug it on the intake side. Then stick a small screw driver into the top of the pvc valve and see if you can get it to release. Typing this I just thought of something. It may sound stupid but sometimes we do odd things. Are you sure you sticking the pvc valve in correctly. Meaning its not flipped around ?
Another thing I would do is remove the flitting on the intake and check it for being plugged. Also spray some carb/brake cleaner thru it. Might want to check the hose itself for plugs as well. I am 99% positive it is a pvc related problem.
Hummm did you cold tank the valve cover ? Did you replace the gasket inside the valve cover where that plate bolts to the top of it ? The plug could also be there. Normally this isnt an issue since it has large openings for air to pass and not oil.

topkicktech · « **Reply #17 on:** Sep 20, 2010, 11:09:01 AM »

im sure its not upside down. its bigger on one end than the other.

topkicktech · « **Reply #18 on:** Sep 20, 2010, 11:12:16 AM »

the fittings are not plugged and yes the valve cover baffle is in good shape. i know what pcv is and what it stands for i know how it works. i work on truck for a living. the issue isnt the pcv its that the intake is making to much vacuum. the pcv with the engine running keeps the crank case at manifold vacuum. so if there was a issue with the pcv then the crank has would have low vacuum or pressure in it. that not being the case i need to figure out why i have such high manifold vacuum.

crazykooter · « **Reply #19 on:** Sep 20, 2010, 04:12:02 PM »

Whats high ? I good 22R/E should be around 18-19 psi idle.

topkicktech · « **Reply #20 on:** Sep 20, 2010, 05:01:54 PM »

You mean inches of vacuum right. That's what all my Buddys are running at

Joey88RUNR · « **Reply #21 on:** Sep 20, 2010, 08:13:40 PM »

I think you should put a vacuum gauge on this thing and get an accurate reading instead of a geuss.

twistedtoy92 · « **Reply #22 on:** Sep 20, 2010, 08:24:37 PM »

Quote from: Joey88RUNR on Sep 20, 2010, 08:13:40 PM

I think you should put a vacuum gauge on this thing and get an accurate reading instead of a geuss.

x2 vacuum test the oil dip stick tube

topkicktech · « **Reply #23 on:** Sep 20, 2010, 08:26:28 PM »

manifold vacuum is at 24" and crank case vacuum is 24" at idle. is there someone esle out there with a vacuum gauge that can check theres at the dip stick. i say the dip stick because most toyota dipsticks are old and worn out and leak air into the crank case. so if you test there its not a issue

twistedtoy92 · « **Reply #24 on:** Sep 20, 2010, 08:41:51 PM »

my vacuum gauge is at work but I will check it out tomorrow

BoG-ToY · « **Reply #25 on:** Sep 20, 2010, 08:51:18 PM »

can you buy a new 22re dipstick? where and how much? just a though, I do a lot of sand wheelin and wet wheelin and dont like the loose fit of the dipstick

twistedtoy92 · « **Reply #26 on:** Sep 20, 2010, 10:11:07 PM »

Toyota

emsvitil · « **Reply #27 on:** Sep 21, 2010, 12:03:26 AM »

Remove the front hose that's on the valve cover............

topkicktech · « **Reply #28 on:** Sep 21, 2010, 06:30:08 AM »

I bought mine from Toyota i think it was about $20

brainlessfool · « **Reply #29 on:** Sep 23, 2010, 09:42:09 PM »

Quote from: emsvitil on Sep 21, 2010, 12:03:26 AM

Remove the front hose that's on the valve cover............

ding ding ding! your breather hose is not hooked up right. it lets air (clean air after the filter) in the crank case.
find it and make sure it's not pluged off.

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