Head Resurfacing, How Many Times?
 

Well I got the whole thing apart, the head gasket was leaking to the outside on the third cylinder from the front, drivers side. Then I found a piece of head gasket laying in the block; the third cylinder from the back passenger side had completely blown it out! that was a 3" piece of head gasket missing and a dropped valve seat on that cylinder. I bought a flat bar, and the block passes .002" except back by the water channel on the drivers side (very back of the block, where between the cylinder liner and the water channel where it is between .002 and .003.) It does not appear that it was leaking there. Block "looks fine", I can't see any cracks or evidence of cracks.

Turns out the heads are rebuilt, they have the overheat button on them. They don't pass .003", not even close. I read in the manual .005" is the max they can be worked. I assume if they have been rebuilt, they were already resurfaced once. In the Atlantic British video, he says if too much is taken off, your intake manifold bolts won't line up. Does anyone know the max that can be taken off? Will the machine shop know how much has been taken off, and how much more they can be taken down?

Thanks

Head Overheat button? What is that?

I keep picturing this. :laugh:

https://cimg5.ibsrv.net/gimg/landrov...ccb0960c4.jpeg

Ha Ha! It is kind of like that, they put a little plug in the end of the head, that has a material that must melt at overheat temps, so they can tell it was overheated and that voids the warranty.

Got a picture, I have never seen that before.

I think he is talking about this > http://www.holmanparts.com/wp-conten...eatTabs_v2.pdf


https://cimg0.ibsrv.net/gimg/landrov...d04bdee03b.png

Weird

To answer the question.. Maximum warp is .002, Maximum reface limit .02, at least this is what i was told. If the heads have been resurfaced already by a good shop, they should have stamped how much was removed the last time it was surfaced -- usually on one of the casting ears.

My heads were resurfaced .014 and had never been done before.. nor can they be resurfaced again!

Yep! Mine were really warped but salvageable :dunno:

Go to a junkyard that has a rover in it, grab the heads for cheap, use a straight edge and a flashlight, if straight, install and drive. You guys kill it with the resurfacing all the time. Every head thread, someone says resurface. Stupid. The block and head already have production designs that make the head gaskets fail regardless. People dump $xx,ooo into rebuilding these things and 100,000 later the gaskets fail anyways.

if you want it to seal bolt it together with a layer of jbweld...never tried this but makes me wonder lol.