Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Jean-Christophe on March 27, 2015, 05:48:44 PM

Title: ZJ - Cylinder Heads remplacement
Post by: Jean-Christophe on March 27, 2015, 05:48:44 PM

Hi,

I need to replace both cylinder heads on my 5.2 ZJ.
I don't look to make it better thant the original but they are dead (valve guide are dead).
I also need gaskets and all needed small parts.

Do you have a recommandation to purchase as I'm in Begium?

I also need a water radiator, it could be a group purchase but the radiator is less urgent.

Thanks and have a good day,
JC

PS : Members at JeepForum.com are sending me here as you and me are on the same side of the atlantic ocean :-)

Title: Re: ZJ - Cylinder Heads remplacement
Post by: big g on March 27, 2015, 07:40:44 PM

Everything you need should be available from rock auto.com

Doubt you'll find new heads just get an engineering shop to recon the originals.

Title: Re: ZJ - Cylinder Heads remplacement
Post by: bigjeepzj on March 27, 2015, 08:06:33 PM

 :iagree:

we have a discount code for rock auto
http://www.birtydastards.com/frm/index.php?topic=27225.msg316880#msg316880

Title: Re: ZJ - Cylinder Heads remplacement
Post by: bgbazz on March 27, 2015, 08:07:23 PM

 :iagree:...crack test, skim a few thou off and replace valve guides...port and polish, if you are serious about it.

Title: Re: ZJ - Cylinder Heads remplacement
Post by: Jean-Christophe on March 28, 2015, 03:07:58 PM

It is cracked.
The use of LPG is deadly for those kind of cylinder heads...
A head gasket leak made my engine to overheat. Analysing the cylinder head relealed cracks and valve leaks.

I believe I realy have to change them.

Title: Re: ZJ - Cylinder Heads remplacement
Post by: Bubba on March 28, 2015, 08:54:48 PM

are they aluminium heads then ?

Title: Re: ZJ - Cylinder Heads remplacement
Post by: Mike Pavelin on March 28, 2015, 10:17:50 PM

Should be iron IIRC

Title: Re: ZJ - Cylinder Heads remplacement
Post by: Bubba on March 29, 2015, 08:52:08 AM

thats what i thought

Title: Re: ZJ - Cylinder Heads remplacement
Post by: Jean-Christophe on March 29, 2015, 03:39:17 PM

I don't think it as aluminium heads (but the are at the workshop now).
The valves where badly damaged by the LPG, as I understand. That's why they are not sealed anymore.

You lost me with "iron IIRC". What is it?

Title: Re: ZJ - Cylinder Heads remplacement
Post by: wildwood on March 29, 2015, 04:17:23 PM

IIRC means: If I Remember Correctly

Hopefully just new guides and valves /seats will be needed....

Title: Re: ZJ - Cylinder Heads remplacement
Post by: Dutch on March 29, 2015, 10:33:52 PM

Hello JC,

A whole 5.2 block for sale on Dutch Jeep Forum.

http://www.jeepforum.nl/topic/27728-52v8-motorblok-met-automaat-en-tussenbak/#entry322117