Can heads on a 3.0 Lincoln LS be reworked?
I have a 2000 lincoln ls 3.0. I have been told it has low compression but no water is present in the oil can the heads be reworked on this jaguar engine
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thecardoc3 Member Posts: 5,801With what you have described and especially the fact that some of the statements are contradictory the only thing that one can be certain of is that you need a qualified technician to prove what is going on as best as is possible.
The report of the cooling fans not working is "a problem" that needs to be confirmed and then diagnosed.
The report that you can only run the vehicle for a given amount of time and then it runs hot and you have to add coolant is again "a problem".
The history of the engine freezing is yet another variable to the above problems and one that there is no way to truly account for. That is by far the biggest problem you have reported. Someone pulling the cylinder heads and either replacing them or sending them to a machine shop for testing and reconditioning would not have anything beyond a basic visual inspection in order to try and see if there is damage to the engine block. The lack of visual evidence at that point doesn't guarantee that the attempted repair will be lasting and that means there is plenty of room for an unsatisfactory result. That is "a problem".
Forget about the plugs and wires right now. They would be simple to address during an engine repair if you choose to have this fixed which leads to one of the biggest problems. Nobody wants to work on it and I can't blame them. There are too many traps that they could get caught in, not the least of which is the lack of familiarity with this limited production vehicle. Even a dealer isn't likely to want to risk marrying this either, they would rather just sell you another car and ship it off to the auction where it would probably sell to a recycler. When a shop takes on a project like this what usually happens is that if they don't achieve a perfect result no matter how many problems they solve what ever problem remains gets to be labeled as "The Problem" and the rest of the work that they did gets trivialized and may even be unfairly challenged as having been un-necessary. The reality right now is that some of the tress will need to be cut down to get to see the forest behind them.
BTW. If you choose to replace the engine, the only one you should consider is an exact match for the car.
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isellhondas Member Posts: 20,342Cardoc hit the nail on the head. No smart shop owner would want to get involved with this ball of snakes and for good reason!
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But then you describe being able to run the car at night for forty-five minutes and you have to add coolant to keep going. Just because the water isn't showing up in the oil, that doesn't mean that you do not have an internal leak. In fact you could easily have cracks in the heads that get into the exhaust ports. That would cause you to lose coolant and not see much evidence of it beyond some water vapor or odor in the exhaust. The most telling statement that you made has to do with needing the core plugs replaced. At this point it would be very risky to attempt to just service (replace) the heads. There could be additional problems with the engine block because who knows what other kind of damage occurred when the core plugs got forced out.