head issues
 

LOL

I did a leakdown test last night and gave up.

Put #1 to TDC , hook up air/gauges, 100psi drops down to 12psi . i listen to air, its coming out of spark plug hole on cyl#2 WTF

i put it on #4 hook up leakdown tester, shows 89 on this one.

move #2 to TDC, hear air coming throu #1 shows 12psi on the gauge
check on #3, air coming out of #1 shows 12psi on gauge..


how are #1 and 2and 3 tied together? any possible way?

-e

Re: head issues
 

It's all in your head. ;)

Honestly, the only thing seperating the cylinders are the pistons and the head gasket.

Re: head issues
 

You mean block and headgasket?

When you are doing a 'leak' test enes, pop off the radiator cap and listen for boiling. If you hear bubbling, you have a blown headgasket. They really shouldn't be pressurizing each other, unless you are pushing it past the rings into the crank case...

Re: head issues
 

Yeah i had the oil cap off, and i had the radiator cap off as well. no bubles there but that s probably because it can't build enough preassure in the cyl to get there. Since its all escaping into the cyl next to it.

If taking engine out didn't involve doing trany as well i'd so be taking the engine out of the bish right now. Or i should ask how hard is it to take engine out while keeping trany in there and then connecting it back together?

Re: head issues
 

If you're pulling the motor, pull it w/ the tranny attatched. It'll save you some headaches.

Re: head issues
 

yeah i supose its easier, but is it worth it to take whole engine out to do headgasket?

Re: head issues
 

No.

Re: head issues
 

Just pull the head off. You should be able to have it off in a few hours, then you can see what the problem is.

Re: head issues
 

Enes- weren't you have troubles before with bad overheating? Head could be warped. Or am i thinking of someone else? I know you had some smoke troubles or something but i can't remember what the details were.

Re: head issues
 

it overheated a bit due to me leting it idle on turbo timer (no fans) without supervision.

i do have to mention the testing i did was on cold engine. will do it again tonight after i let it warm up

Re: head issues
 

Does it smoke white at all?

How about oil on the dipstick, is it milky looking?

Those cylinders shouldn't be associated with one another at all. Air would have to bypass one set of rings, go into the crankcase, travel up to another cylinder and bypass its rings. My guess is the headgasket is shot.

I used a stock headgasket, and i sprayed each side with copper spray when i redid my head. Been holding up fine. Are you using ARP's? What's the most boost you hit with your 50trim so far?

Re: head issues
 

ARP's, 24psi 111 octane.
oil is clean, coolant is clean

its probably blown between cylinders, even tho the car idles and runs just fine..
super weird.

-E

Re: head issues
 

Why bother checking it when it is warm? If it is bad, it is bad. Let me know when you get the head pulled off. I have only seen DSM headgaskets blow from the cylinder to a coolant passage (except for my metal one last year that melted out the back side of the head).

Re: head issues
 

Did you TDC the cylinder right after the exaust valves closed or when the intake valves closed? If you try to pressure up the cylinder during overlap it will do what you are describing.

Re: head issues
 

Are you sure you did the test on the compression stroke at TDC and not just at TDC?

Re: head issues
 

uhm... stupidity at its best... proven..

not sure, i just got it to TDC and did it. yaay RTFM

Re: head issues
 

Do you know how to check to see if you're on the compression stroke?

Re: head issues
 

Hahah, oh man... Let's us know how that goes for you. :)

Re: head issues
 

please advise on how to check to see if i'm on compression stroke..


;p

Re: head issues
 

So how do i determine that Cyl1 is on compression stroke, ?
same should apply to #4 at the same time correct? or are they not at the same stage?

-E