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Jaguar Head Stud broken

For articles related to the Jaguar marque
You’ve just discovered there’s water seeping out the top of a head stud & to make life worse the stud has come apart from the base thread, so what are the options – remove the head & tap a thread into the top deck of the block, not the best option – expensive & time consuming, next option is to access the remaining thread via a welsh plug ( freeze plug) you could try & grind flat to drill and tap out the old thread but this again is time consuming & can be expensive & unfortunately some will try re welding – now that’s a real mess.
Don’t despair there is hope with a fix I have done on my own engine (XJ6 S2) & others I call “The sandwich bolt”, this method works when you just need the problem fixed & back driving with a minimum of fuss & expense. Here’s a step by step guide with graphics to repair the problem without removing the cyl/ head....Download the PDF file for full guide ......
head stud broken.jpeg
 

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  • Broken head stud.pdf
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mezy

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Lost me at broken stud, there is no mention o£ removing the old stud, unless i have read it wrong.
 
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XJtom

XJtom

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The broken stud comes out the top of the head, usually whats left is still screwed in the bottom of the block which is corroded away
 

mezy

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The broken stud comes out the top of the head, usually whats left is still screwed in the bottom of the block which is corroded away
I see so, the original coroded stud is not removed, It stays where it is and you just use a stud and nuts to stop the water comming up the stud,
Surely as you say i£ one stud has rotted away, there is most likely others, this would put extra pressure on the weaker studs either side o£ the broken one.
Please correct me i£ im wrong
 
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XJtom

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how many others are a problem is determined by how much sludge is in the block, the fix is mean to get mobile again with a fix that will provide tension at the head and seal the leak as a normal stud would
 
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