Blown headgasket

**Bradtot** · 18th May 2006, 11:25 PM

Hows this for a blown headgasket on a 89 rangie.
The heads have been reconned before I bought it and composite gaskets used but the head bolt torque was all over the place.
Brad

**p38arover** · 19th May 2006, 06:43 AM

Zackly the same as my P38A - blown out the side. The car sounded like a chaff cutter and I had to drive it home (had I known that the NRMA would have flat-bedded it, I wouldnt have driven it).

Ron

**stevo** · 19th May 2006, 12:44 PM

that is a blown head gasket

the heads have'nt been warpped buy the incorrect torque being used and buy the sounds of it done buy someone who does not own a torque wrench

**incisor** · 19th May 2006, 12:54 PM

i have a head gasket like that on my series landy engine, thru in 3 out of 4 pots and it still ran :P
smoked the crap out of the yard, but it was running :P

**PhilipA** · 19th May 2006, 02:53 PM

That is a typical failure, often caused by the outside bolts pulling the head down on that side and therefore up on the other. So next time do not tightedn the outside bolts or better still leave them out.
You will see no involvement with water passages at all, so no inkling except that the crankcase gets presurised and oil starts blowing out everywhere.
The head of my 81 had been gone so long when I fixed it, that it had burnt a path into the alloy about 4thou deep.
regards Philip A

**Pedro_The_Swift** · 20th May 2006, 03:41 PM

having not seen the inside of a LR V8 before, I can plead ignorance,,

but whats the go with the dished valve??
and why only one?

**p38arover** · 20th May 2006, 04:06 PM

Originally Posted by Pedro_The_Swift

but whats the go with the dished valve??
and why only one?

Actually, Peter, there are 8 of them.

Ron

**Pedro_The_Swift** · 20th May 2006, 04:14 PM

Originally Posted by p38arover

Actually, Peter, there are 8 of them.

Ron

the question still stands,
why such a deep dish?

it is hard to tell about the two on the left--

**Bradtot** · 21st May 2006, 08:30 PM

Originally Posted by Pedro_The_Swift

having not seen the inside of a LR V8 before, I can plead ignorance,,

but whats the go with the dished valve??
and why only one?

Hello Pedro I have just checked all the other valves in the heads and they are all dished.
You just cant see from the pics.
Why they are dished
I cant answer.
Brad

**DEFENDERZOOK** · 21st May 2006, 09:34 PM

they are all like that.....its normal....

and whilst you have the heads off....get the valves lapped in as well if you are
not getting the heads serviced.......

Thread: Blown headgasket

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