Need help re-installing PCV system

[TGO]

My cousin bought a 92 Typhoon yesterday. 69k original miles. It has a few issues...which I am trying to help him sort out.

The most important of which, IMO, is smoke coming from the drivers side valve cover. First thing I did, reading about these cars, was panic...from fear of blow by. However, the smoking is pretty constant. Meaning there's no pulsing of it as the cylinders fire.

Next thing I noticed, is that the PCV system is completely removed. Why, I don't know. The truck has an aftermarket intake on it, which doesn't have any provisions for PCV, but, I'm still not sure why whoever installed it wouldn't take the time and modify it to work properly. Anyway...like I said, there's no PCV system on this vehicle. Just a breather on each valve cover. First problem is the smoke. Mostly on the drivers side. Second problem is the mess it's making.

I removed the breather on the drivers side valve cover and covered both the breather hole and the oil fill hole and did not feel ANY pressure building up. So what I am looking to do now is get the PCV system back on the vehicle and see if it alleviates the problem. It runs fine. It feels a lot stronger than I expected having never driven a Typhoon before!

I'm wondering if anyone has any pictures or a diagram of how things are supposed to be routed. I've searched and all the threads with relevant pictures have dead links.

Secondly I would like to confirm proper part numbers. I'll need everything...from the pcv valves to the hoses to the "T" fitting.

Here's some pictures of the current set up, if anyone can advice how to make it work...otherwise I have no problem going back to the stock intake (if anyone has one to trade or sell). I never really saw much advantage to aftermarket intakes on boosted applications anyway.

 

[atomicmecha]

Re: Need help re-installing PCV system

The smoke on the drivers side happens when there is some blowby or bad seals. Mine does it and almost all of my valve seals are shot atm. And its a steady stream of smoke. Only happens off idle tho. Constant smoke means something a lot worse from what i've gathered around here.

There should be a funny looking T pipe on the passenger side that fits 2 PCV valves into it. One runs to the throttle body. The other side runs to the intake. The driver's side is suppose to run to the air box.

I'd get pictures for you, but its dark atm. If no one else has some, I'll get some tomorrow while I'm under the hood.

This is the diagram of how it should be setup.

 

[TGO]

Re: Need help re-installing PCV system

My issue is I don't have a stock intake....so I need to figure out how to make things work or return to stock intake. There is no "airbox" in the location shown in the picture you posted. Also, considering the "soft" hoses currently on the vehicle, I don't see how I can reliably tap in to them.

Also, on the passenger side, aren't there two different type of pcv valves? Meaning, two different part numbers?

As far as bad valve seals/rings...yeah, it's made me afraid. And I do expect *some* blow by on a 20+ year old turbo vehicle. However, there are just as many threads showing that in the absence of a pcv system smoke doesn't mean your motor is shot. And I would imagine exhaust gases from combustion passing in to the crank case would give some sort of noticeable pressure change. So, I'd like to start small before rebuilding the engine for no reason. I've never driven a car with a hurt engine that pulled so hard. Turbo nor not. Although if it is a real problem, i'd take valve stem seals over anything else ! lol!

I would appreciate some pics of a properly set up pcv system though if you could.

thanks

 

[Static]

Re: Need help re-installing PCV system

Put a push breather/filter on the location where #3 is in the above diagram. Get tor pcv valves and tee setup. I used zip ties to hold it all together good. Run the 1 hose to the throttle body, the other hose youll need to tap into that aluminum intake pipe. It looks like the RPM CAI...I thought there was provisions for the pcv hose on that?See herehttp://www.sytyperformance.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=680&category_id=23&manufacturer_id=0&option=com_virtuemart&Itemid=26 (i dont know if the pcv valves are different, try searching here see if any good threads turn up)

 

[Logan]

Re: Need help re-installing PCV system

PCV valves are both the same part number, one functions under normal driving conditions while the other works under boost. I bought Borg Warners from O'Reilly Auto because they are lifetime warranty so can't go wrong there.

Also, with that intake I drilled and mounted a plastic nipple to run the soft hoses about an inch away from where the filter meets the intake. As far as the 90 degree hoses, just go back in the parts store where the heater hoses are and find one that has 2 bends in it that will work, that is what I had to do and it was about $7.

I think you are on the right track with this but also know that the turbo can hide performance problems. I bought mine under the assumption it was a cherry 67,000 mile truck and when I first drove it there was light knock that went away after a few seconds that I just wrote off as a problem from it being in storage. The knock came back after a few hours of driving along with smoke, the truck would still run like hell but when I tore the engine down my main bearings were a really pretty copper color and my rings were gone. I am not saying that is the case, just know that these trucks eat engines from time to time.

 

[TGO]

Re: Need help re-installing PCV system

Put a push breather/filter on the location where #3 is in the above diagram. Get tor pcv valves and tee setup. I used zip ties to hold it all together good. Run the 1 hose to the throttle body, the other hose youll need to tap into that aluminum intake pipe. It looks like the RPM CAI...I thought there was provisions for the pcv hose on that?See herehttp://www.sytyperformance.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=680&category_id=23&manufacturer_id=0&option=com_virtuemart&Itemid=26 (i dont know if the pcv valves are different, try searching here see if any good threads turn up)

I have a push breather on both valve covers. I am not looking to leave it like that. There's oil all over the place.

PCV valves are both the same part number, one functions under normal driving conditions while the other works under boost. I bought Borg Warners from O'Reilly Auto because they are lifetime warranty so can't go wrong there.

OK. I thought they were different because of the one for boost, one for regular driving.

Also, with that intake I drilled and mounted a plastic nipple to run the soft hoses about an inch away from where the filter meets the intake. As far as the 90 degree hoses, just go back in the parts store where the heater hoses are and find one that has 2 bends in it that will work, that is what I had to do and it was about $7.

I'm confused about where the taps need to be. One valve on the passenger side goes to the TB, one goes by the air filter....the drivers side is supposed to go to the air box. There is no air box...so that should get mounted by the air filter too?

I think you are on the right track with this but also know that the turbo can hide performance problems. I bought mine under the assumption it was a cherry 67,000 mile truck and when I first drove it there was light knock that went away after a few seconds that I just wrote off as a problem from it being in storage. The knock came back after a few hours of driving along with smoke, the truck would still run like hell but when I tore the engine down my main bearings were a really pretty copper color and my rings were gone. I am not saying that is the case, just know that these trucks eat engines from time to time.

Thanks. I think the most logical solution is to start small and see where it goes. Like I said, excessive blow by is a real concern, however that should create pressure in the crank case, and I didn't feel anything. And, I revved the engine while covering the PCV and oil fill tube.

 

[Static]

Re: Need help re-installing PCV system

OK if you don't want to run a push breather then run the driver side valve cover one over to the air intake. Go get 2 brass barb fittings from hardware, tap in somewhere on that intake pipe and run both #6 and #3 to them. All the oil will go into the air intake and get burned off by the engine as originally intended by factory. I just figured that once you have a correctly functioning pcv system you may not have a whole bunch of oil coming out the driver side valve cover any longer.

 

[TGO]

Re: Need help re-installing PCV system

OK, so passenger side I need the T fitting. One valve goes to intake, one goes to TB. Drivers side goes to intake. Yes?

 

[Static]

Re: Need help re-installing PCV system

You got it.

 

[proptop]

Re: Need help re-installing PCV system

Guy's
I was not going to get in the middle of this but I will give the site my two cents. The truck does need a PCV valve but in my opinion the factory did it wrong. The factory setup does relive the pressure but it pulls it back into the intake track/manifold (which is bad when you are under alot of boost and over time will coat the whole intake system). You really dont want to introduce oil into the intake track ever. The best way to fix this problem is to install on PCV valve in the passenger cover with a one way check valve that will close under boost conditions. The driver side valve cover should have two breathers installed. What I normally do is to put in the small when (one in the picture) and take the oil cap off and install a KN push in breather there also. Hopefully this helps.
Thanks,
Bob

 

[dgoodhue]

Re: Need help re-installing PCV system

Guy's
I was not going to get in the middle of this but I will give the site my two cents. The truck does need a PCV valve but in my opinion the factory did it wrong. The factory setup does relive the pressure but it pulls it back into the intake track/manifold (which is bad when you are under alot of boost and over time will coat the whole intake system). You really dont want to introduce oil into the intake track ever. The best way to fix this problem is to install on PCV valve in the passenger cover with a one way check valve that will close under boost conditions. The driver side valve cover should have two breathers installed. What I normally do is to put in the small when (one in the picture) and take the oil cap off and install a KN push in breather there also. Hopefully this helps.
Thanks,
Bob

If you want to keep oil out of the intake track install an oil catch can. Your solution has no provision from removing positive crank pressure when it needed most from a performance stand point, which is at wot under boost.

 

[proptop]

Re: Need help re-installing PCV system

OK Thanks,
Bob

 

[TGO]

Re: Need help re-installing PCV system

Ok gentlemen...so I went to rockauto and ordered 3 pcv valves, 2 new grommets, and the only "T" valve they have listed.

This is what I received:



I don't have the valves yet. But, based on the picture of what they look like:

I don't see how this will all work together. The big end of the T adapter is too small to fit in the hole in the grommet. Do I still have to cobble this all together with pieces of rubber hose?

Does anyone have a picture of the stock set up?

 

[blackty]

Re: Need help re-installing PCV system

If the two pcvs on the pass. side are the same part number, which one knows the difference between boost and vacuum?..Jim

 

[dgoodhue]

Re: Need help re-installing PCV system

If the two pcvs on the pass. side are the same part number, which one knows the difference between boost and vacuum?..Jim

The port going to the throttle body will be have the potential for boost and vacuum. Under boost the pcv valve will close. (Non operational).

The port going to the intake tube will always have some vacuum with the engine running but it will create the most vacuum when the engine is under full boost.

 

[dgoodhue]

Re: Need help re-installing PCV system

TGO you will need to buy/find the original pcv T and 2 rubber elbows.

 

[TGO]

Re: Need help re-installing PCV system

So that's not it? I only bought it because it said pcv fitting for turbo equipped cars.


I guess I'm gonna have to go to the parts store and piece something together myself. The only place I found that has the required elbow's wants $44 each. And all other parts are listed as discontinued.

I swear I don't know why people have to ghetto rig their cars. It would have taken minutes to fix it properly, but nope...just stick a breather on it Cleetus.

 

[TGO]

Re: Need help re-installing PCV system

Ok. So today we went to work. I installed a "t" with 2 pcv valves connected to it in the passenger side valve cover. One valve is connected to the throttle body, the other runs to a hole I drilled in the intake tube where it and the pcv valve from the drivers side head are connected to another "t" thats plugged in to the intake. It solved the smoking at idle and normal driving problem, but, when we stepped on it for a few moments the car started smoking again. Pulled over to find the oil cap blown off and sitting by the brake booster. I can also now feel pressure coming from the oil cap that coincides with the revolutions of the engine. So, I guess the motor is shot?

How long does it have to live if it has bad rings?

Also noticed today from a cold start that it's kind of a hard start...which I imagine is a sign of low compression .

I'll be damned if it doesn't push you back in to your seat though. I am curious to feel a healthy one now.

 

[Static]

Re: Need help re-installing PCV system

Do a compression test on it. Go rent or buy a gauge if you don't have one. Could be rings, could be a piston. Compression test will tell how bad it actually is.

 

[atomicmecha]

Re: Need help re-installing PCV system

There's not suppose to be a PCV valve on the drivers side cover (the one by the brake booster). If you put one there, it'll blow it out everytime you lay into the boost. Its suppose to be a direct hose to the air filter box. Since you don't have that, like me, you'll need to fit a small filter directly to that spot. It'll still blow smoke out of there till you fix the blow by issue.