TravisCadello

Well when i traded my old civic off it had never gave me motor problems, well now im buying it back because its been parked for longer than 3 months. He said he exited the freeway after long drive maybe 60 miles and the car turned off and he pulled over and tried to start it again and it started he said he drove it to his friends and it died their and wouldn't start at all. finnally he got it on and took it to his house and from their it never started again.


I went and checked it out, looks like the timing belt is pretty loose maybe it jumped a tooth? or what else could this be?


I built this motor 8 months ago everything is new in engine. its a JDM D15B Block PM3 Pistions and a D16y8 V-Tec Head and p28 ecu. the ECU needed to have the y8 fuel maps programed on but never got to do it so it lost power from 1000-3000RPM's other than that no problems and great on gas.

What sounds like the problem? when i went to start it it kinda sounded funny like timing was off and it never ever even tried to fire once. i didn't check the distrutor.

TravisCadello

whats it sound like?

TravisCadello

Dam, Nobody?

CivicSpoon

Are you sure you're using PM3 (D15B7) pistons??? That should be some crazy high compression, if that's not a typo. I'd pull the head and check the valves, to see how bent they are, and/or if they damaged the pistons in any way. At the very least do a compression check. What cam gear are you using? Is it the stock D16Y8 one, a '92-'95 one, an adjustable one (for which head)?

ferio252

Second on the compression check.

TravisCadello

Yes, The JDM D15B had PM3 (D15B7) pistons. aparently in japan or china all the D15's b7,b2 all them were stamped D15B. But internals were a bit different.

And yes, a very high compression motor. ran great for me for 3 or 4 months of ******* it pretty badly.


And why would the vales or pistons have damage?


And no its running a stock D16y8 Cam gear and z6 timing belt. and y8 head gasket 3 layer.

R666_EK

You should be running the belt for the head. If you do a head swap the timing belt should be for the head being used.

If the timing belt is loose its because you:

A) Used the wrong belt
B) You installed it wrong or didn't tension properly
C) MAYBE had a component failure.

EDIT: Just noticed you were running d15 block. Never messed with d15's. I could be wrong.

CivicSpoon

So are they the stock pistons from the D15B that you bought, or did you put those in? I guess I should have asked which D15B you had, instead of just assuming you had the common JDM D15B VTEC engine most people buy. So is it just a stock short block, with a Y8 head on it?
If you have a high compression engine, and your timing belt slips, then there's more of a chance that you'll have piston-to-valve contact. So that's why I mentioned possible damage.
Since you're running the Y8 cam gear, your timing is going to be 4.75 degrees (1/2 tooth) retarded. So that might be something to think about.

TravisCadello

I think the distributor went out..... Its a d16y8 dizzy case with z6 dizzy's internals i swapped them over to run the y8 head.