XJ6 & XJ12 Series I, II & III 1968-1992

which thermastat?

 
  #2  
Old 01-04-2008, 03:05 PM
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Default RE: which thermastat?

I would not worry about a 4.2 Series 3 over heating. The XJS v12 was the engine that ran hot. You are safe. I would install a tappet hold down kit. Maybe that is what they were referring to.
 
  #4  
Old 01-07-2008, 02:15 PM
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Default RE: which thermastat?

We have them here:

http://www.motorcarsltd.com/item.wws?sku=IN102997

I would have a mechanic do it. You must drill into the head and then tap the holes. You must be careful not to drill into the water jacket and keep all the metal shavings from entering the engine.
 
  #5  
Old 01-07-2008, 02:16 PM
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Default RE: which thermastat?

Just another thought. You can remove the oil filler cap and look to see if you already have this installed. Just look in with a flashlight and see if the guides have metal plates holding them down.
 
 
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