[RacerX]

Heres the scenario. I rebuilt the head on the DET and have new intake valves, seals, and smoothed the damage on the pistons out. (very slight indentions that could be removed with a fingernail)

I put the head on all is together and I only have compression in Cyl #1 and it reads about 140 Cyl#2,3,4 are all 0?? Ideas???

I checked cam timing and it seems to be right on. I realize the head might be warped but how am I getting 0 compression on three cylinders??

Any ideas are GREATLY appreciated, I dont want to pull the head until im done doing whatever testing I can with the head on.

Thanks
-Andy

------------------
93 NX2K
some stuff and a DET
"project street mod?"
1988 BMW M3 w/ a few toys

 

[Nick]

Have you tryed to put some compresed air in to the cylinders to find out were they are leaking ?

------------------

 

[RacerX]

No, I plan to do a leak down test (esentially the same) this week but I have to get a compressor or air tank to my apt.

------------------
93 NX2K
some stuff and a DET
"project street mod?"
1988 BMW M3 w/ a few toys

 

[skyliner]

Get somebody to spin the motor over while you have the valve cover off make sure the valves are opening on those cylinders thats about the only way to get 0 compression. You can put a head on bare with no head gasket and probably get 20 pounds or so.

 

[Guest]

Now how is this. 0 compression? The only way I can think of some one getting 0 is if you do a compression test without turning the motor over. Just a refresher. "Disconnect the coil. Pull the fuse for the fuel pump. Hold the throttle open (many different ways to do this) and let the car crank a few times per cylinder you plug into". I mean no offence if this is what you are doing, just wanted to refresh. I wonder if you might have something wrong with your compression gauge..????

 

[RacerX]

we checked the compression gauge on another car after we saw it reading 0 it worked fine , we didnt the test 3 times making sure we didn't miss anything and some how its still giving a rreading of 0 on those cyls. Skyliner's idea makes a lot of sense so im gonna go check the timing again... keep the ideas coming! Everything helps....

Thanks

------------------
93 NX2K
some stuff and a DET
"project street mod?"
1988 BMW M3 w/ a few toys