igo4bmx

So i most likely have a headgasket issue, but I am not sure if I have a piston issue (whether it be rings or the pistons themselves).

Smoke comes out of my breather all the time (idle or WOT, and in between) - PVC is open dump

Car overflow tank would also fill under boost.
Ok so I have sludge in my overflow tank but does not overheat. However my crankcase looks like oil, and I do not see any white substance in there. I'm assuming that when i boost, my head lifts and oil and carbon (which was also found) go into my coolant.

compression test (with seven cranks) CP 75.5mm 9:1 pistons in a d16y8 motor

1 - 190
2 - 200
3 - 200
4 - 200

My plugs
1 - sludge on threads
2 - normal
3 - normal
4 - normal

Im ready to take my car apart soon, but I am not sure if I need to take the bottom end apart.

Any advice?

Zakar

post your setup...


did you use ARP headbolts?

s2kdre

i had the same probs s u do, and it was the headgasket,

igo4bmx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Zakar &raquo;</TD></TR><TR><TD CLASS="quote">post your setup...


did you use ARP headbolts?</TD></TR></TABLE>

yes ARP's in a built d16y8 motor...
my sig has the setup

Zakar

then HG would be the culprit

96 GSR-T

A leakdown test will help confirm the headgasket.....

igo4bmx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 GSR-T &raquo;</TD></TR><TR><TD CLASS="quote">A leakdown test will help confirm the headgasket.....</TD></TR></TABLE>

im gonna replace it.

only thing i'm worried about is that I still have smoke coming out of the breather hole on the valve cover...

ilikebigbutts

could be a blown headgasket but not bad enough that it "plugs up" when the motor get hot.Did you do a compression test while the engine was hot?

Also pressure test the cooling system.Good luck

ILBB

96 GSR-T

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ilikebigbutts &raquo;</TD></TR><TR><TD CLASS="quote">could be a blown headgasket but not bad enough that it "plugs up" when the motor get hot.Did you do a compression test while the engine was hot?

Also pressure test the cooling system.Good luck

ILBB</TD></TR></TABLE>

When you do the leakdown test you can pop the cap off the radiator and look for bubbles, that will help indicate a headgasket.

At this point you know something is wrong, so might as well pull the head

nonvtecD

ARP headstuds are not the cure all of HG problems. I'm curious what your timing maps look like and how that might have affected the popped HG.

igo4bmx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 GSR-T &raquo;</TD></TR><TR><TD CLASS="quote">When you do the leakdown test you can pop the cap off the radiator and look for bubbles, that will help indicate a headgasket.

At this point you know something is wrong, so might as well pull the head</TD></TR></TABLE>

even before i had less than 1% leak on all cylinders... and the coolant would rise...
this is because the head would pretty much seal, when no load it on the motor... but when in boost it lifted

Sketch_hs

do a leakdown test