XJ XJ8 / XJR ( X308 ) 1997 - 2003

Question for 4.0 SC Motor-Buffs

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Old Aug 16, 2014 | 10:02 AM
  #1  
Rlover's Avatar
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From: ma
Default Question for 4.0 SC Motor-Buffs

I have a 99 VDP with the SC option and I changed out my packs/plugs and noticed four plugs were sitting in oil.




99 VDP/SC Questions:


- Do the heads have to come off to do the valve seals? Any advice?
- Has anyone placed a killer-chiller in the bay and if so any advice?


I have a 98 XJR SWB and I would like to place a BC 500+ CU motor in it. No SC or etc. Just make a lot of torque and over 650HP. My BIL is an engine builder/engineer so he can make it work with electrical and the mechanicals. - I don't want to change the suspension/steering etc and cutting the hood defeats the purpose of having a sleeper.


98 XJR Questions:


- Any advice?
- Has it been done if so by whom? Specifics as far as what they did etc.


Thank you


Rlover
 
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Old Aug 16, 2014 | 10:59 AM
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From: Douglasville Ga.
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For the 99 VDP you just need a valve cover gasket set, it's just the oil seals around the plugs, not valve seals.
 
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Old Aug 17, 2014 | 03:18 AM
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if the valve seal question was not related to the oil in the plug wells -
it is physically possible to replace the valve seals without removing the heads, but the dangers and risks far out weigh the price of a set of head bolts and gasket set.
 
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