Don Terrill’s Speed-Talk

These pistons have about 6 hours running on them...Was ordered for 438 stroker... Diamond Pistons Specs Job# 30085 Bore= 4.1250 Compression Height: 1.250 Effective Volume: -7.8 Valve Depth: Intake .290 Exh .250 Top Ring: 1/116 2ND Ring: 1/16 Oil Ring: 3/16S Support Rail: 01-9000-120 Lock Ring Descri...

Make sure the gaskets go all the way up to the china walls. If they don't, when you slap the heads on, there's a nice little crevice that is not sealed. Felpro MLS gaskets are horrible for this, but the Cometics seem to go all the way up. I made sure of that....I used black high temp under the head...

Mine has the lower drain back holes below the head studs ..That was the svo gasket, but i still wouldnt be using the 2 upper big holes....Here is the gasket i was running on my block, which is the svo without the upper holes... http://i914.photobucket.com/albums/ac341/billykristall/2010_0310new0065....

This is what another guy said he though was going on.... -------------------------------------------------------------------------------- Yes any irregularity on the block or head in that area can creat a pathway. Or a little spec of anything under or inbetween the layers of the gasket. Another thin...

dirtracr5 wrote:porous block or head? did you try any kind of oil dye?

What kind of dye they use for this ??

The Radius Kid wrote:Cometic MLS?

Yes' first new set leaked in same place..This is a brand new set of cometic's

I had this oil leak from day 1...Went back with all new head gaskets, and still a leak in the same place...No oil can be seen anywhere behind intake or valve cover gaskets...Pass head is still dry as before..Could the block not be flat toward the end, or dip off...I was on the phone with dart/brodix...

I use this oil often and it's very tough to make a determination when there is a picture of the oil sitting in a black catch pan. I would be interested in seeing a picture or even a video of you letting the used oil run over your finger. Some of these oils get dark after run time. If your still sea...

I shook the new and older 5 mins each...But i think i will just buy new oil...

Went and bought a new qt of Vavoline VR1 20/50 and compaired the color...The new oil is on the right, The oil i have had for a few years , is on the left....

What exact oil did you use previously? Was it a non- or low-detergent racing oil? What exact Valvoline 20w50 did you use this time? There are many variations of 20w50 made by Valvoline. Vavoline VR1 20/50 was in it a few weeks back...I drained it and put kendell racing oil in and only did a few 60f...

Belgian1979 wrote:Well today's fuel is more acid than when it was just dino fuel. It is said this contributes to the return of the the black death phenomena. Frequent oil changes are the only solution I think.

Could bad or old fuel do this ??? It was VP 116

mag2555 wrote:I would pull that filter, slice it open and look for shinny stuff just to be on the safe side!

I cut the new wix filter first thing' no metal at all....

JoePorting wrote:Looks like the combustion gases are getting to the oil somewhere. Is there any smoke in the motor? When you pull the breather off, does smoke come out? Maybe the valve guides are worn? What does the oil smell like?

Nothing at all coming from the breather....No smell of gas....

JoePorting wrote:Maybe the rings not seating?

Would it not smoke ??? Doesn't even smoke at higher rpms going down the track...