There had been a full head job done 15 K Miles ago by the previous owner. Hose blew and a friend over heated it.Now there is a compression stroke leak on the passenger side between the head and block toward the exhaust.Oil is fine ( no mixing ) and there does not appear to be coolant or oil leaking but sounds like a bad exhaust leak. Checked the head bolt torque and they were 45 Deg from snug. Tightened to spec did not help.

I have done many head jobs but not on a rover. Question is if I remove the head do I have to have the head milled flat ( warp ) or can I just replace gasket ? My exp. with these little tinny alum heads is the bolts pull them wear you need them.

Thanks !

 

You will need new bolts (they are stretch bolts). You would want to check for flatness, even if not milling the heads. Shop may do that for a minimal charge. IMHO that is a wise investment, although if you have the right feeler gauges and a known flat edge, you could also do it. But that is something they do every day.

A number of online sources to select for HG, British Pacific is one. You should also have the free RAVE download, which includes both shop and overhaul manuals; link below.

 

I can check for flatness as I have a full service machine shop with granite surface block here.So what I gather is as long as I get new bolts and gaskets I should be good.

Correct ?

 

If you have a surface plate, you know the drill. The other end of the DIY spectrum is Ralph Ryobi with a belt sander....

 

I have a nice big mill I can surface in as well with not to much trouble.
as far as warp how much would you let go by with out surfacing ?

 

see attached from the RAVE tech manual set, this is from the overhaul manual. Free download of whole manual set in my signature panel. Carry on USB to office. I can't trust my memory as much anymore, used to have a mind like a steel trap, now it's rusted shut....

 

Thanks a ton bud!

I will let you know how I do !

-Drew

 

Savannah,

have the heads off, they look great EXCEPT there is a .030" warp from corner to corner. OR from the center line of corner to corner there is a .015" gap measure on my granite block.

Think I can pull that or need to surface ?

Thanks !

 

Do you have a burn mark on the heads or block where the exhaust was escaping, if you that will need to be cleaned up, so yes they need to be resurfaced but only take of the minumin so you don't effect the compression.
Make sure to use American or German head bolts, none from China and use head bolt threaD LUBRICANT ON THEM WHEN FOLLOWING ROVERS PRCEDURE.

 

The RAVE spec on that page for warp is .002, so re-surface seems in the cards, if no other problems. Good time to do valve seals, of course. If you will look on our recent posts, several D2s with cracked oil pumps, so an inspection might be a good idea