Help Needed
Hope you guys can shed some light on this.
Installed new HP pistons /rings/new cam & a set of AFR aluminium heads.
Car runs ok have only done a couple of Km's but it breaths from the 2,4,5 & 8 bank only.The right side is fine.Does anyone have any info as to why this is doing this.
Have done compression test and all cylinders are 185 psi + or minus 3.
Looks like it';s breathing from both sides but the left side rocker cover has the baffle plate below the breather so it is probably taking the easiest route

 

how do you know it breaths from only 1 bank? it probly wouldnt run if only firing on 4 cyls

 

Not sure if you have the right problem.The engine has some pressure or oil leaking past the rings ( Blow by ).All cylinders have about 185 psi give or take 1 psi.
You can see it breathing through one side of the engine ( 2,4,6,8,)this is coming out of the oil cap come breather cap.There is another one ( cap )on the other side of the engine but there is nothing coming out of it.That is probably because there is a baffle located within the rocker cover below the cap.

 

do u have a pcv valve?

 

Did have pcv valve but took it out to see what blow by I had as it was still coming out of the drivers side rocker cover cap come oil filler.
Have decided to rip the engine out again and check whats going on , neally out now

 

well, what was your vaccum at? if u have a huge cam, then there is no vacum at idle, and u may need a crankcase evacuation system, this system uses the headers to take the pressure off, but if u have a small cam, then there may be a bigger problem, did you clean all the crankcase venting passages?

 

The engine had only done about 300 kms since brand new and as everything was as clean as.Have just found out that when using moly rings the stones used for honing need to 280+ otherwise the rings won't bedd.
I unfortunately used stones that were 220 or lower.These are fine with cast rings but no good with moly rings.So the engines now ready for lifting back out

 

ahh yes i see now, good luck

 

It's ok I pulled the engine out again,stripped it and re-honed the bores to the correct grade stones.
Engine all back together now so cross your fingers and I'll install it back into the rod in the next fortnight

 

good luck man hope this solves your problem