my first time and im gonna give it a try

[240sxvaj]

alright so today i figure i had blew my head gasket.oil came out of my valve cover to my oil catch can and came out of there.the bottom of my radiator hose had oil dripping there also.i am gonna inspect it tomorrow if i have time just to make sure

so if it means rebuild time then im gonna pull out my motor, but then the thing is i wouldnt know what i will be doing.i search for a ka24de swap guide w/ pix but then only found guides w/ no pixanyone here got ka24de swap guides w/ pix?i know someone here or some where else do guides w/ pix

i hope i dont get flame for this.

and again its gonna be my first time doing this

[240sxvaj]

forgot to tell the info on my car

1991 240sx fastback w/ ka24de-t25

oh yea and i found this on the forums

zerothread/295556

that helps but then i think pix with it will be ALOT easier

thanks!

[WDRacing]

Check your compression first...

[240sxvaj]

Check your compression first...

i think i blew my piston ring. oil looks pretty dark, my radiator fluid is still full and my car didnt overheat at all (maybe because of my koyo racing rad). no signs of water leaking out of my tailpipe, but white smoke from exhaust and smells like oil to me. Plus if you look from the oil cap theres a little scratch on my cam shafts

What can be the cause of this? can it be my ecu tune because i just got it tuned from e-mance, but i cant say anything because i didnt have a wideband. Can timing from the tune F*ck me over? I dont want to rebuild and then find out my tune is bad.

[480sx]

Dude, dont THINK you have a blown ringlands, do the basic checks first and then come back to us.

COMP CHECK TIME!

Also, it would help to know what you were doing, and how the car broke down when all this happened. Was this the first time you tried to boost, or was this a few months after you got a working setup? What boost levels, were you WoT high rpms, that kinda stuff will help us help you.

Im curious now about emance, so get us some good info so we can see whats up.

Oh yea and.. Your gona love me for this one haha, hats off to positronone for this.. The thread ---------> zerothread/299950But really theres not much to pulling the ka, you just gotta dive in and get it done.

[240sxvaj]

Check your compression first...

alright so i did the compression test like everyone said and turns out my 2nd piston is fried

*from the radiator to firewall*Piston #1 reads: 160 PSIPiston #2 reads: 30 PSIPiston #3 reads: 145 PSIPiston #4 reads: 150 PSI

when i took out my spark plugs i saw that the 2nd plug was all burnt up so i already knew it was rebuild time

Dude, dont THINK you have a blown ringlands, do the basic checks first and then come back to us.

COMP CHECK TIME!

Also, it would help to know what you were doing, and how the car broke down when all this happened. Was this the first time you tried to boost, or was this a few months after you got a working setup? What boost levels, were you WoT high rpms, that kinda stuff will help us help you.

Im curious now about emance, so get us some good info so we can see whats up.

Oh yea and.. Your gona love me for this one haha, hats off to positronone for this.. The thread ---------> zerothread/299950But really theres not much to pulling the ka, you just gotta dive in and get it done.

alright so i was boosting at 7psi like always and shifting at 6,000 RPM every gear til the end of 3rd gear and then assoon as i stop at a stop sign, i look back and there i see lots of white smoke like CRAZY! and notice my engine was have a really rough idle.i then look at my hood and saw a crap load of white smoke comming from my right side.when i open the hood all the white smoke was gone so i couldnt tell where it was comming from.after that i drove it home and look under my car and saw oil dripping from the bottom of my radiator and it had so much pressure that it came out of my oil catch can tank which was next to my battery.

im suprise my engine went bad because i hardly boost my car

and THANKS! for the thread on pulling the KA! lol!

[Neejay]

EDIT: Nevermind. I had this thread up from yesterday and replied without refreshing the thread first.

EDIT #2: When you went KA-T, what were your compression numbers? and/or did you rebuild first?

[240sxvaj]

EDIT: Nevermind. I had this thread up from yesterday and replied without refreshing the thread first.

EDIT #2: When you went KA-T, what were your compression numbers? and/or did you rebuild first?

i never check my compression when i went ka-t til nowim sure it was high over its normal range though.the guy at the dyno shop i went to said he knows my compression is good because i was putting good number on the dyno.

[Rhapsody]

when testing compression for blow pistions you should check temp when the engine is at normal operating temperature. Also you should check the compression normally then put a few cap fulls of oil in each cylinder then check again. The oil will help the rings get compression back. If you do have a blown ring the difference in compression numbers between non-oil check and oil check should be around 25+psi. If compression jump that much you can conclude you have a blown ring. If not other things may be wrong like a bent valve or something. As far as rebuild goes, you don't really know what you need till you break down the engine and check everything and i mean every little thing. Use the FSM under EM > Cylinder Block and follow how to dissasemble and check stuff. I actually just rebuild my engine so i could turbo it. I ended up just putting new rings in and getting an oem full gasket kit. If you do plan on rebuild your engine you will need a Gasket kit. Thats for sure.

[240sxvaj]

when testing compression for blow pistions you should check temp when the engine is at normal operating temperature. Also you should check the compression normally then put a few cap fulls of oil in each cylinder then check again. The oil will help the rings get compression back. If you do have a blown ring the difference in compression numbers between non-oil check and oil check should be around 25+psi. If compression jump that much you can conclude you have a blown ring. If not other things may be wrong like a bent valve or something. As far as rebuild goes, you don't really know what you need till you break down the engine and check everything and i mean every little thing. Use the FSM under EM > Cylinder Block and follow how to dissasemble and check stuff. I actually just rebuild my engine so i could turbo it. I ended up just putting new rings in and getting an oem full gasket kit. If you do plan on rebuild your engine you will need a Gasket kit. Thats for sure.

temp. stays normal

[480sx]

when testing compression for blow pistons you should check temp when the engine is at normal operating temperature. Also you should check the compression normally then put a few cap fulls of oil in each cylinder then check again. The oil will help the rings get compression back. If you do have a blown ring the difference in compression numbers between non-oil check and oil check should be around 25+psi. If compression jump that much you can conclude you have a blown ring. If not other things may be wrong like a bent valve or something.

If all your doing is checking to see if you have blown ringlands, you dont need to do any of that. Its going to be reallyy obvious if your pistons are shot. The comp reading will be on the floor. Sure you can add oil and see your comp numbers go up slightly, but why even bother at this point. From your numbers you already know you have to rip the block apart. You use the add oil check when doing a compression check on a seemingly healthy motor, not one you know is shot. In addition, a cylinder with blown ringlands could care less that its got some extra oil on the top of the piston, its still got a gaping hole where the ring should be seated thats going to drop the compression considerably.

Also, valves dont get bent unless the engine jumps timing(which wont happen unless your chain breaks) so you can pretty much scratch that possibility off the list.

[Neejay]

Also, valves dont get bent unless the engine jumps timing(which wont happen unless your chain breaks) so you can pretty much scratch that possibility off the list.

What about if the chain jumps teeth somehow? (I think that's what just recently happened to me)

[480sx]

In order for that to happen, you would have to have a serious timing chain failure. The double linked chains simply do not stretch enough to allow such a thing to occur. If your tensioner somehow broke it COULD happen, but more than likely the chain would just make a crap load of noise and you would stop driving it before anything happened.