I had trouble with my engine after it had been in storage for 15 years. The bottom line is two valves hung up and I removed the head to have it rebuilt. Prior to removal of the head the compession of four of the 6 cylinders was about 200 psi. The head rebuilder found that the head was out of flat(warped) by .023 inches and said machining it flat would exceed the nisson recomendation. I need a new rplacement or some advice what to do next. The rebuilder suggests sending it to a place in Canada where they would anneal the head and reheatreat and machine. What do yu think

My head was out of whack quite a bit too... but my therapist took care of it :classic:

Seriously, my E31 was warped .025 and my machinist was able to heat it and clamp it down to get it perfectly straight again without any machining. The company is here is St. Louis and they specialize in repairing heads. In fact, many dealers around the country send their problem stuff to them.

Give them a call... maybe you can send it to them and they can take care of it.

JCM Machine Shop

5655 Old Highway 21

Otto, MO 63051

(636) 942.4567

The owner's name is Charley. Be aware that they are usually quite busy...

He did the machine work on my block and balanced everything for my race engine and built my E31 -- did a great job.

Rick