Removing cylinder head

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spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Removing cylinder head

Post by spandit »

Am I right in thinking that the cylinder heads are independent as there's only one I'd like to remove (the #4)?

Any pitfalls in removing/reinstalling it?
--

Robin

Pinzgauer 710K
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Pinzgauer Pete
Posts: 322
Joined: Mon Mar 22, 2010 3:07 pm
Location: Middletown, New York

Re: Removing cylinder head

Post by Pinzgauer Pete »

Yes each one is independant of one another and can be pulled as such..what makes you want to do this?
life is like a box of chocolates...you never know which one you might get

710M
spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

I've got an oil leak from the #4 cylinder exhaust manifold stud and want to see if it's repairable
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Robin

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spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

Right, I've undone 4 nuts on the cylinder head, plus the manifolds, guide sheets etc. but it won't move more than 1/4" - do I need to pull harder or am I missing something?
--

Robin

Pinzgauer 710K
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spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

Well, after a lot grunting, swearing etc. and undoing the clip underneath the engine, the whole thing came out, cylinder and head. Not a lot of room to get them out and I don't think it's going to be easy getting them back in together.

Anyway, I can't get the two halves apart. The cylinder is cast iron and the head is aluminium - I can see a tiny gap between them so it must have moved a fraction (not enough to get a Stanley knife blade in or any sort of lever). I'm leaving it soaking in penetrating oil overnight but if it doesn't shift then, what can I do?

On the good news front, the suspect stud seems to be OK - the helicoil wasn't in flush. Doesn't explain where the oil leak was coming from, mind...
--

Robin

Pinzgauer 710K
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Stekay
United States of America
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Re: Removing cylinder head

Post by Stekay »

I'd think about 15 minutes in a 400 degree oven would do the trick.
'76 710K
spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

I'll give it a go - I guess the components get hotter than that in normal usage anyway
--

Robin

Pinzgauer 710K
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spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

Spoke to an engineer at work and he suggested using a gurt big 'ammer. I held the cylinder in a padded vice and put a block of wood inside it, against the valves. A few taps and the head came free, which is a relief. Just trying to clean the old, baked on oil off the aluminium. Have left it soaking in kerosene overnight
--

Robin

Pinzgauer 710K
MegaJolt ignition
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spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

Well, it's back on again - couldn't space the rings properly (at 120º apart) but don't
think they're all lined up. Had a bit of a worried moment when I
couldn't turn the engine round by hand until I realised I'd knocked it
into gear.

I'm hoping the oil leak might have been from the return pipe as the seal was rock
solid.

The offending exhaust stud threadsert/Helicoil has been
replaced. It's not perfect but more solid than before - I wish I could
get hold of the person who has forced the wrong sized bolts into holes
designed to have inserts in them - similar story in one of the brake
drums!

I do need to check the voltage at the #1 solenoid when the engine is running as
it does click/move when tested otherwise
--

Robin

Pinzgauer 710K
MegaJolt ignition
(upgrading to MicroSquirt)
spandit
Posts: 660
Joined: Tue May 18, 2010 5:15 am
Location: East Sussex

Re: Removing cylinder head

Post by spandit »

Starts up OK (worrying noise initially but am told that's normal as all the oil has drained out). Quietened down a bit after that.

Think oil leak might have been caused by hardened seal on the oil return tube. Doesn't appear to be leaking now
--

Robin

Pinzgauer 710K
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Zambo1990
Posts: 7
Joined: Mon Jul 14, 2014 5:46 pm
Location: McMinnville, Oregon

Re: Removing cylinder head

Post by Zambo1990 »

I have the same leak, I am about to work on it, I have the engine out. How was your long term repair job? Did it ever start leaking again?
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