347 issues

[blackpony]

Alright guys having an issue with this car. its a 94 cobra has a 347 with 230 cc heads, anderson n91 cam, 1.7 rockers etc... the problem lies with blow by issues. the engine was running before with a milder combo, and never once had a problem with excessive blow by issues, but after swapping the heads, cam and rockers, we are now having a huge issue with this... tried adding a small oil catch can made by using an air compressor water separator, but after we started it up, revved it a couple times there was about an inch of oil already in the can... the short block has less then 1k miles on it... we are planning on relocating the catch can farther away as there is only about a foot of line for the pcv valve and we just spliced in the can, but i doubt this will solve our issues... it is blowing smoke out the exhaust bad.... any ideas???

 

[Paul]

Have you run compression/leakdown tests on it to see if your rings are shot?

 

[94kingcbra]

You can try increasing the size of all of the tubing coming from the valve covers. Did you install a pcv splashguard where the pcv plugs into the rear of the lower intake? If you did, you could try a bigger pcv valve or taking the guts out of yours. This will increase your pcv's ability to handle the demand of the 347. What color is the smoke?

Have you run compression/leakdown tests on it to see if your rings are shot?

+1

Goodluck man.

 

[snakesonastang]

I had blow by on my 347, so I did away with the PCV system. Ran baffled valve covers and breathers. This eliminated the oil blow by that I was experiencing.