Hi,I've got Ford Taurus 2002 and last year it overheated (all of the coolant leaked out completely because of rusted pipes for interior heating). Now it has low compression on two cylinders, but only at low RPM and only sometimes. At higher RPM (highway) it runs as good as before and it even has the same fuel consumption as before. There is no white smoke whatsoever and no coolant in the oil. I wonder if it makes sense to attempt fixing the engine or it's more cost effective to replace the whole engine.
Country: CanadaMake: FordModel: Taurus SELYear: 2002Engine: V6
No attempt to fix, my mechanic just measured the compression. Also, when changing the oil recently, if looked OK visually (as before). Also, a heater connector had to be replaced shortly after the overheating happened (coolant leaked out).
If there is low compression then I would say it would be best to replace the whole engine with a good used engine, because when a engine is overheated like that there is likely other damage that has not shown up yet.
So you're saying, the fact that low compression goes away at higher RPM doesn't mean much? I was kind hoping, if the compression picks up at higher RPM, maybe there'd be some hope... :-) It really runs fine on highway.
No the compression coming up really does not matter eventually this problem will get worse, but if it is drivable you might just keep driving it as long as it is and then replace it.
28 years experience, Master Mechanic