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gordsplace
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2004 Lincoln LS Burning oil smell, especially in cold weather. Intake Manifold Tuning Valves (IMTV).
The ls v6 oil leak issue is not to be confused with the ls v8 oil leak issue. The v8 involves the valve cover gaskets ("vcg") in which oil leaks from the vcg onto the coils and ruins them. This is not an issue with the ls v6. Unless you’re particular car has developed an obvious vcg leak on the ls v6 from what I have read and seen on my own ls v6 the oil leak and burning smell have nothing to do with a leaking vcg.
I found oil leaking from the lower intake IMTV, on the passenger side which in turn drips on the hot exhaust manifold and is sucked into the hvac system and results in a burnt oil smell.
The oil leaks past orings and exits below valve out of sight.
The slight oil leak drips directly onto hot exhaust.
My oil leak is coming from what are called Intake Manifold Tuning Valves (IMTV) of which there are two in the upper intake of the ls v6. They have a rubber oring around them to seal them in the intake. Mine is leaking from the bottom one. Note, make sure you’re using the new style orings. They seal much better.
IMTV o-rings are new if they are "green or black" and old if they are "yellow". Ford Lincoln supplied new black orings. Replace both the IMTV o-rings as they will both be sealing poorly.
I got the orings for two IMTV o-rings $13.00 each from the Ford Lincoln dealer in Kelowna BC, Canada, and they were the only ones that had them. I did not have to remove the upper intake manifold. There is a Jaguar forum that had a much easier way. It involves the Jaguar S type with the 3.0 v6 (same engine in the LS V6) which it shares its platform with around the same model year Lincoln LS.
The Ford Lincoln seals are black.
Here is the link. http://www.jaguarforums.com/forum/sh...ad.php?t=32135
Remove the cowl, wiper arms, front strut tower brace, a few vacuum lines, a bracket on the passenger side strut tower which was holding some wires in place behind the IMT Valve, the cabin air filter, cabin air filter holder, the box protecting the cabin air filter from the engine compartment. This allowed removal of upper and lower IMT Valves. Then you can replace both yellow original orings with new black orings. I lubricated my new seals with a silicone grease to ease installation.
Removing valves with obstacles removed.
This repair took about 4 hours, taking my time. Next time 2 hours will be enough.
Crankcase oil fumes condense and accumulate in lower intake in cold weather.
The IMTV with old seals, I reused my valves with no problems.
You can clearly see how much the old seals are crushed
The ls v6 oil leak issue is not to be confused with the ls v8 oil leak issue. The v8 involves the valve cover gaskets ("vcg") in which oil leaks from the vcg onto the coils and ruins them. This is not an issue with the ls v6. Unless you’re particular car has developed an obvious vcg leak on the ls v6 from what I have read and seen on my own ls v6 the oil leak and burning smell have nothing to do with a leaking vcg.
I found oil leaking from the lower intake IMTV, on the passenger side which in turn drips on the hot exhaust manifold and is sucked into the hvac system and results in a burnt oil smell.
The oil leaks past orings and exits below valve out of sight.
The slight oil leak drips directly onto hot exhaust.
My oil leak is coming from what are called Intake Manifold Tuning Valves (IMTV) of which there are two in the upper intake of the ls v6. They have a rubber oring around them to seal them in the intake. Mine is leaking from the bottom one. Note, make sure you’re using the new style orings. They seal much better.
IMTV o-rings are new if they are "green or black" and old if they are "yellow". Ford Lincoln supplied new black orings. Replace both the IMTV o-rings as they will both be sealing poorly.
I got the orings for two IMTV o-rings $13.00 each from the Ford Lincoln dealer in Kelowna BC, Canada, and they were the only ones that had them. I did not have to remove the upper intake manifold. There is a Jaguar forum that had a much easier way. It involves the Jaguar S type with the 3.0 v6 (same engine in the LS V6) which it shares its platform with around the same model year Lincoln LS.
The Ford Lincoln seals are black.
Here is the link. http://www.jaguarforums.com/forum/sh...ad.php?t=32135
Remove the cowl, wiper arms, front strut tower brace, a few vacuum lines, a bracket on the passenger side strut tower which was holding some wires in place behind the IMT Valve, the cabin air filter, cabin air filter holder, the box protecting the cabin air filter from the engine compartment. This allowed removal of upper and lower IMT Valves. Then you can replace both yellow original orings with new black orings. I lubricated my new seals with a silicone grease to ease installation.
Removing valves with obstacles removed.
This repair took about 4 hours, taking my time. Next time 2 hours will be enough.
Crankcase oil fumes condense and accumulate in lower intake in cold weather.
The IMTV with old seals, I reused my valves with no problems.
You can clearly see how much the old seals are crushed
