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jbcollier



Member Since: 29 Apr 2024
Location: Edmonton AB
Posts: 68
Canada 2009 Defender 110 Puma 2.4 SW Alpine White
2.4 cylinder head cracks
Pulled my head due to the cooling system getting pressurized. Brought it to the machine shop and they discovered micro-cracks between the glow plug outlets and the intake seats. It pressure tests just fine and they say it is fine to use. I know of other engine types where such micro-cracks are just fine but we don't have any experience with this engine over here as it never came here.

Anyone have experience with this they can share?

TIA
Post #1038647 28th Jun 2024 3:34pm
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ickle



Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1776
France 2008 Defender 110 Puma 2.4 CSW Alpine White
Mine had this - if it wasn't for a faulty expansion tank cap that didn't relieve when required I may never have known.

Turner Engineering say new heads are getting more & more popular!

HTH Keith
Post #1038673 28th Jun 2024 8:27pm
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jbcollier



Member Since: 29 Apr 2024
Location: Edmonton AB
Posts: 68
Canada 2009 Defender 110 Puma 2.4 SW Alpine White
Appreciate the info.

So yours was cracks in the combustion face leaking through and pressurizing the coolant?
Post #1038679 28th Jun 2024 10:14pm
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ickle



Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1776
France 2008 Defender 110 Puma 2.4 CSW Alpine White
Yes - I thought it was just the head gasket, but when I did a final clean with a fine scotch pad and a little white spirit, there were two tiny cracks as you describe. Head gasket showed no signs of failure and it had never been overheated in the 210k km I've owned it.

HTH Keith
Post #1038685 29th Jun 2024 7:07am
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jbcollier



Member Since: 29 Apr 2024
Location: Edmonton AB
Posts: 68
Canada 2009 Defender 110 Puma 2.4 SW Alpine White
Thanks! You have saved me from doing the job twice. New head from Turner is on the way.
Post #1038706 29th Jun 2024 11:52am
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