1988 Jag XJS V12 - Rebuild after 20 years

XJ-S
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Back in 2003 I started to do some work on my 88 XJS, I know this
because I pulled the fuel injectors to send them out to be checked and
cleaned. I wrapped them in newspaper, never sent them out. Date on
newspaper is November 2003.
Then house, then kids, then life, and there she sat in the garage.
I am in the US by the way. I have “the book” and started reading it over 20 years ago.

I am restarting the project and hope to have it running by the end of the summer.
I still have all the parts,

Stuff I want to change

  • Get rid of the air pump
    So I have to plug up the holes
  • Install the GM alternator where the air pump used to be.
    I have read the threads on the CS130 vs John Napoli large case, still deciding
  • Replace manual fan with electric one.

Things that happened
It did overheat once on my watch when I first got it, I was not so young, but naive
Advance weights were frozen
AAV was frozen

I have the engine stripped down to the cam covers.
Radiator, fans - out.

I have debated doing the head gaskets. According to the book not possible,
or very hard with engine in car. However I have seen a video where a guy did it.
If anyone has any true experience with this I would greatly appreciate it.
Big question, do I need to?? Or should I chance it. I cannot remember there
being a problem, and the oil is not milky.

I will post individual questions as I move forward after research.
Wish me luck

MrJagDad - Mark

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The OEM alternator was 75 amps in my 82 and going to a 130amp has had benefits. I used Bosch which I can recommend.
IMHO do a compression test (wet and dry) and if it’s within the normal range leave the power plant alone…ie motor stays in the car and heads on… no sense making work for your self.
But your cooling system needs your time and effort. There is a lot to sort out there.

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Hi Mark and welcome.
Keep us posted on the progress, and post some photos!

For the alternator:

As for the heads, if no leaks and good compression, I would let it be.

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