1994 Lincoln Mark VIII Head Gasket Replacement

Tiny
UNDER_THE_RADAR
  • MEMBER
  • 1994 LINCOLN MARK VIII
  • V8
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
Engine is overheating when I use the accelerator - if I idle around, it heats up, but won't overheat. Diagnosed as pushing combustion air into the water jacket when any effort is made to accelerate and cooling system unable to compensate for the extreme heat - NO signs of water coming INTO the oil system. Initial incident came when I left the car running in a hot parking lot - by the time the car was shut off, there was quite a pool of green all around the car. Have only driven very short distances for the past year (since the incident) - less than 50 mi. Total. Ready to replace the head gaskets - I understand that I need to have the heads checked while they're off - but I see some posts on other forums about losing the cam settings (twin cam, 4v system) - what am I up against with that? (No "solution" posts can be found on the other forums.) Also, since I am at 160K, should I be doing other work while I'm in there? Timing belt/chain, etc? I have replaced the water pump, thermostat and alternator in the past year while not driving it. I already purchased the gasket kit -$185. Money is an object, as my daily driver just shot craps with a thrown timing belt. I hope to put enough effort into this job to be able to trust the car for another few years. Very much appreciate experienced input. This is a stock Aluminum head/Aluminum block configuration. OH - and I don't yet own a shop manual - do I go for the $45 "factory" manual, or the $25 Haynes/Chilton. Oh - one more - how about tools? I have quite a few standard tools - will I need specialized tools? I intend to rent a torque wrench from the parts store - and I expect the book will tell me what more I may need - but if you can give me a preview, that would be great! I also have an "engine analyzer" and timing gun from tinkering around back in the 80s - will those be of any value in the work I'm about to undergo?
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Thursday, June 19th, 2008 AT 11:37 AM

3 Replies

Tiny
JACK42
  • MEMBER
That is quite a project you have undertaken. As far as manuals go, the factory one is far better than the Chiltons. The manual will show how to line up all timing marks on reassembly, as far as tools go, the book wont tell you what you need, and odds are the average tool set wont have what is necessary to do it, you may have to buy a few small things as you discover you need them. At 160k you are running the risk of having it burn oil when done, but if it was a good runner before it may be ok
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Friday, June 20th, 2008 AT 7:51 AM
Tiny
UNDER_THE_RADAR
  • MEMBER
Thanks for the response - I hope to knock this out in the next two weeks -- I guess I should start trying to locate a machine shop.

As for other things that I should do "while I'm in there" - It seems I should replace the timing belt and any gears/tensioners that wear out - any thoughts on that? Am I making the project too big?

Regarding the "burn oil when I'm done" - is there something else I should do with the engine opened up or is that getting into rings and pistons? Should I avoid reworking the valves? If I improve them will it cause a problem or exacerbate a problem with the rings, seals, etc Many Thanks,
Nate
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Friday, June 20th, 2008 AT 9:30 AM
Tiny
JACK42
  • MEMBER
Aside from a full rebuild, I wouldnt bother with anything as far as rings go. The timing belt, tensioner and idlers, I would change. I would do the valve job though, wouldnt want to get it back together and have a rough idle due to leaking valves
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Friday, June 20th, 2008 AT 11:09 AM

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