This use to stop after engin would warm up. However, now it is leaking all the time. leak shifted from front of manifold to far rear. I placed some thread locker in the front stud for 1st fix. I was able to put my hand on the cold engin and feel the leak at the far rear. However, it appears impossible to get any std type of wrench on the rear stud nuts. Can it bee done??
These are nasty manifolds... they are prone to failure at any or all of the weld points due to the extremely high temperature that they are repeatedly exposed to and must cool off from. Sadly, the manifold is retardedly difficult to replace and match correctly to the engine's head so it is best to replace the head and manifold in a pair from the same donor car. These manifolds are nearly impossible to repair, especially due to the location of the studs, etc. good luck man
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Sounds like to me a small exhust leak either
a exhust manafold gasket or exhust flange
gasket or cracked exhust manifold.
Anything else would be enteral meaning
valves need to be set, bad lifter, bad rod bearing,
bad oil pump, or timing chain tensioner,
BUT I would be willing to put my money
on an exhust leak or timing chain tensioner
it's one of the 2
remove the manifold from the engine and have it machined flat at an engineering shop . Fit new manifold gasket and tension the studs correctly in the correct order . Check the stud tensions as the innermost studs are tighter than the end studs .
Hi, have you checked for intake manifold gasket leaks? Pretty common on Ford V-6. With engine running, spray carb cleaner on the gaskets. If the engine speed changes, you have a gasket leak (yes, driver's side of the manifold).
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Its likely on oil leak from the valve cover thats leaking down onto the exhust manifold. You could try snuging up the bolts that fold the cover on but don't try to over thighen them to the point that you distort or crack the cover even is the keySometimes this will stop or slow the leak but most of the time the gasket will need to be replaced
Does this vehicle have a 3.1 or 3.4L motor. If so they commonly have intake manifold gaskets failures. This leads to coolant leaking, usually at the corners of the intake manifold and in some instances leaking into the oil. Look for signs of coolant leaking at the corners of the intake manifold and check the engine oil for coolant.
check where the headers come off of the engine exhaust leaks are generally quite loud and you will either be at the headers/exhaust manifold or just as you come off that bend there will be a flange gasket inside the two pipes joining. from the bend to the straight pipe just as it passes the gearbox and starts to straighten out.
Could be a vaccum leak or Intake manifold leak. If you spray brake clean around the intake manifold and the idle returns to normal you have found the leak. Do not use water as this could hydrolock the engine causing further damage.