My q is post rebuild after overheating why does it not idle but otherwise sounds good

White smoke

It did overheat hence the rebuild but is not now

I took the head to a head shop and he replaced the valves head wasn't cracked or warped. We put it back torquing 25 50 50 plus quarter turn from the inside to the outside. If when it overheated and water mixed with oil in the catalytic converter. Would it blow white smoke and stink till it clears out? Could that affect the idle? My friend is bringing his compression, vacuum and computer reader tomorrow any ideas would help new oil and filter flushed the radiator small puddle of oily water mix under the tailpipe.

Thank you sooo much I'll let you know what we find out my dad always said a teacher never ceases to learn

I found oil in the coolant reserve tank this morning. After running awhile we found water in the oil. We went to the headshop and he said he pressure tested the head and it isn't warped. If the block isn't warped he said blow air through the oil pressure hole in the block and listen for bubbles in the water holes. Cracked block is not good

The block doesn't seem to be warped. My friend took a straight edge and thin piece of paper. We'll blow it out on fri. Any other ideas?

We did a test and blew air into the oil hole after covering up bolt holes and returns and got air through water holes. Can I put a non egr 2001 2.4 into where an egr motor was? Someone said the computer may not know. If not I can switch heads