did head job car, now won't start

Hello

I like the way you explained that issue. If the valves are both open at the same time you'll have a compression loss. If the heads were re-surfaced and if too much material was removed to have a even surface there is a chance that the valves are compressed by the head and slightly open. This is a possibility...

Dan

__________________
My goal is to save you money and time, I have a simple and logical approach for troubleshooting technical problems.
If you find my answer to be helpful, please remember to ACCEPT the Answer! Thank You!

no I meant that the valves were closed when I released the nut on the inntake and the exhaust rocker arms then I have compression. although the number 1 cylinder has compression the number 3 and 5 don't unless I do the above I don't think too much was taken off the heads. But if so how do I resolve the problem without replacing the heads.

Hello

If I understand this correctly the valves will close once the rocker arms are released, removing the bolts. The valve springs will close the valves. If you tighten them and lets say the head has lost a quarter inch of material the head, once torqued down will compress the rocker and hold the valve open enough to cause a compression release (both valves open at the same time, extreme overlap) which will cause a loss of compression. If all the associated parts are the same with the exception of the "shaved head" and "replacement head gasket" then something is wrong with these parts.

You also have to keep in mind the valve timing which is the location of the crankshaft, camshaft etc, upon reassembly. I'm assuming that you used the correct alignment?

Also, did a timing belt break which created this job or was there too much slack in the chain if equipped? If the engine was running and the drive connection failed the valves could have been bent by the pistons making ever so slightly contact with them, that would also cause the compression loss.

Make sure you covered these areas before going any further.

__________________
My goal is to save you money and time, I have a simple and logical approach for troubleshooting technical problems.
If you find my answer to be helpful, please remember to ACCEPT the Answer! Thank You!

I didn't go into the timing area only a top end this car has timing sensors (three of them) for the computer to act and set timing. I did not touch any of the timing areas. With that in mind I think you may have got it by the head being shaved too much. I was thinking if I take out the rocker arm bolts and install lock washers under them that will raise up the rocker and so compensating for the extreme shaved head. What do you suggest? Also maybe adding 2 head gaskets will make a difference.

I like that idea as a test. I would hand-pick washers at a minimum thickness of .0075". We'll assume that they took off roughly that amount of material. If the compression comes back up then we know that is the problem. If you have to double up on the washers, we really know they took too much material off the head.

__________________
My goal is to save you money and time, I have a simple and logical approach for troubleshooting technical problems.
If you find my answer to be helpful, please remember to ACCEPT the Answer! Thank You!

Dan I finally found the problem the lifters weren't primed as soon as I primed them and got oil up to the rockers I got compression. I want to tell you thanks for your advise and I accept your replies thanks again 2 heads are always better than one. thanks again

That would definately cause the problem. I didn't realize the lifters were replaced. I would always submerge the lifters in oil in an old coffee can overnight before installing. They would prime themselves laying in the oil. You can also crank the engine without the plugs to accomplish this task as well.

I'm just glad to see that everything worked out okay.

__________________
My goal is to save you money and time, I have a simple and logical approach for troubleshooting technical problems.
If you find my answer to be helpful, please remember to ACCEPT the Answer! Thank You!