Quote:
Originally Posted by ps2cho
If your plugs are fouling it is due to valve stem seals leaking. Very common.
I hollowed out the precats on my 300TE last year. Can't say I notice a difference. I only did it since they had heated up heavily due to oil consumption via valve stem seals for a long time from the P/O. Sounds same issue as you.
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I agreee with the valve stems seals, especially since the seller daid he had repeated problems with those 2 cylinders. BTDT.
But he still has the problem with the new plugs & injectors in the motor.
The seals should be replaced Heep. Not a big deal. No need to remove the head for that.
The seals are very inexpensive, if you are a diyer.
http://catalog.peachparts.com/ShopByVehicle.epc?q=1989-Mercedes--Benz-300e-Engine--Mechanical&yearid=1989%40%401989&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6201%3AED%7C10000013%3AMBC%7C1507%40%40300E&catid=240154%40%40Engine+Mechanical&subcatid=240477@@Valve+Stem+Seal+Kit&mode=PD
If not a good indy will be in the 200-250 range.
I still think you are going to have to address the air/exhaust flow problem, probably in the precat, as discussed. Good luck.