Thread: Oil consumption
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Old 12-28-2003, 09:20 PM
samiam4 samiam4 is offline
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Join Date: Jul 2002
Posts: 1,141
With 130k miles,

The M103 engines were weak on Valve guides. I don't know when a change in materials was made- maybe your 89 has them. They are also weak with headgaskets.

I would go to about 700 miles/quart and start saving up some bucks. If you DIY the head, I suspect the cost could be 200-300 for parts and machine work. I've drilled out the guides and installed new ones by chilling. Worked like a charm and the lapped the guides. But, on a better day, I would install the guides and take it to a machineshop for cleaning up the valve seats.
My 86 model is going to be in the same boat soon. It's got 75,000. I was thinking that excessive oil consumption might lead to an earlier cat failure.

Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E
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