Oil Catch can
Oil Catch can My car burns a considerable amount of oil. About a quart every 250 miles give or take a few. smoke comes out the tail pipes at high acerlaration and deceleration. my first thought was piston rings but i read that an oil catch can is a must have for all lsx motors and that the pcv systems on these cars are junk? Didnt know if anyone had experienced the same proble and what to do? Thanks!
They're not a MUST HAVE but they help alot for trapping oil and water vapors. Mine catches a good bit. Are you sue your PCV vale is working correctly? I ran a PCV valve from an ls1 corvette in my drive side valve cover, vented the passenger side with a beather and ran a line from the drives side valve cover to the catch can then from the catch can to the back of my carb (your intake).
I used a norris catch can
http://www.pro-touring.com/forum/showthread.php?t=43918
I used a norris catch can
http://www.pro-touring.com/forum/showthread.php?t=43918
Well the PCV valve is a check valve. It's like $4. I cant for the life of me remember where it is on an fbody ls1. I know it would be coming from the driver side valve cover and be somewhere between there and your intake.
It is actually on the passenger side at the valve cover by the intake. I had the same problem with my car using an insane amount of oil - changed the pcv valve and the problem went away. The pcv valve was bad. I still need to do the catch can mod though.
It should be on the passenger side, connected to the intake and to the back of the heads. I would replace the PCV valve first and see it that is your current problem. Then once you fix the problem, I would add the catch can to help prevent oil consumption.
You sure are burning a lot of oil for it to be PCV problem. I would be concerned about valve seals, guides etc as well. You may even have a ring sealing issue. My 99 burned oil like that and I ended up having the bottom end rebuilt (under warranty at the time) new rings, pistons etc..Try the updated PCV valve and catch can, but prepared for it to be something else.
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You sure are burning a lot of oil for it to be PCV problem. I would be concerned about valve seals, guides etc as well. You may even have a ring sealing issue. My 99 burned oil like that and I ended up having the bottom end rebuilt (under warranty at the time) new rings, pistons etc..Try the updated PCV valve and catch can, but prepared for it to be something else.
Maybe it's both rings, and PCV in which case if you fix the PCV and add a catch can you can decrease the amount you burn. Until you can tear it down and fix the main problem..
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i was having the same problem do a compresion test on it check the #7 spark plug then pull another one see if they look the same that maybe a easy way to check cause my #7 piston had a big spot of rings missing so i was getting relly bad blow by so check that spark plug and see how it looks before doing the whole catch can
the pcv runs fromt the driver side valve cover in the rear to the passanger front on the intake and in between there is a litttle piece! is that what your calling the valve? sorry dont really know how to describe it?
Yes, that is the valve. I would replace it. I would also inspect the rest of the hoses connected to it for any corrosion or tears.
the motor was just rebuilt about 5k miles ago and had all new rings and pistons! so i cant help to think that my rings are ok and i know that doesnt matter but... i dont believe that it is the valve guides casue it dont smoke when you start only at high acceleration and deceleration?
I would get rid of the pcv completely. Just cap everything off and a breather on the passanger valve cover to take that variable out of the equation. Then if it keeps burning oil then u know u have a bigger problem.
Wouldn't do this. You need the vaccuum the PCV creates to help eliminate crank case pressure.
You can delete the whole PCV, but the engine will need mroe then one vent on one side, you'll need to put one on both sides, and probably vent the valley cover too.
I put a set of fab valve covers on my 402, ran a -10 line to connect them and then run to a moroso vent can, like what is used with a vacum pump.
It has been working pretty good for a year of 9 second passes.
I put a set of fab valve covers on my 402, ran a -10 line to connect them and then run to a moroso vent can, like what is used with a vacum pump.
It has been working pretty good for a year of 9 second passes.
