Would bad compression causemy rear main seal to blow?
 

What I'm saying is: I got 190 in cylinder 1 and 225 in all others. This morning while driving 'spiritedly' (12 psi runs). sometime I blew my rear main seal.

It was either caused by bad compression in one cylinder which caused an unstable wobble on teh crank shaft under load.

OR

The fact that I have no PCV system on my setup so pressures are getting into the block and pushing against the seals.

Would it be ok for me to replace the seal, and install a pcv system? or will it blow out again because of the lower compressionin one cylinder?

I need some real help. I'm trying to decide if I want to just fix the problem or jump a year ahead in time on my hobby and build this thing that way it should be to meet my goals which I had set for at least a year from now...

thanks for any help guys

Re: Would bad compression causemy rear main seal to blow?
 

lower comp means excess blow by which can blow seals when the pressure isnt vented efficiently

get a catch can and u shouldnt have any more problems with the seals, but the problem of the lower compression in 1 cylinder will remain :S

Re: Would bad compression causemy rear main seal to blow?
 

well I know the lower compression will remain, but my main concern is would the lower compression than the other cylinders cause the crank to wobble and blow out the new seal that I would install? I woul dliek to have the car running and ready to dyno in january, but if its just gonna blow the seal out again, I'm not going to bother.

Re: Would bad compression causemy rear main seal to blow?
 

yeah... one time when i cracked ringlands before i really knew it, i got on it really hard getting on the freeway one time and i basicly experienced the same thing you did, except it was my cam seal.

Re: Would bad compression causemy rear main seal to blow?
 

You need a functional PCV system. Kill yourself for being so stupid as to disable it.

Re: Would bad compression causemy rear main seal to blow?
 

stock pcv system doesnt work under boost. kiss my ass ::)

Re: Would bad compression causemy rear main seal to blow?
 

Pin-I know I referred you to this site, but that was a fuckup. Honda (and most all other cars that come naturally aspirated) PCV's close as soon as they see boost, which is why we remove them, gut them, run a catch can between them and the air intake pipe to the turbo, etc...

Re: Would bad compression causemy rear main seal to blow?
 

so, running a catch can would keep teh pressure out of my block? I dont have to do all teh two way pcv stuff that Fook did in his writeup?

Re: Would bad compression causemy rear main seal to blow?
 

My bad, sorry for jumping on your nuts when I was totally wrong.