Max 'warp' is generally around .003-.006. inches. There are videos online to demonstrate how to check for flatness.

Are you sure the coolant isn't just seeping around the exhaust manifold bolts?

 

Could there possibly be a crack in the head that you can't readily see? Also, there is a 1-1/4" freeze plug in that area - is that sealed properly and is the metal not cracked in that area?

 

Naaa. I put in UV dye and confirmed the leak with a pressure test. It's pretty strange to have this as a recurring issue. I'm familiar with the technique...just wasn't sure of the maximum measurement on these heads. The deck is perfect. No warpage at all.

 

I checked the freeze plugs early in the process. I'll pull it off and re-measure everything...then back to the machine ship with it.

 

Have it magnafluxed......

 

Good idea. I'm a little miffed after spending that much money ($700) to have the heads rebuilt, that I have this issue. The shop came highly recommended, and do a lot of the high performance work here, so I'll use them again.

 

For that kind of money, you could have bought NEW heads, that are better castings........ Or, spend a bit more, and get some EQ Monster Magnums.... they flow a LOT better than the stock heads.

Ah well. Let us know if the shop finds anything interesting.

 

What brand of head gasket's are you using?

 

Sounds like a cracked head. Magnafluxing should easily find it.