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Old 07-27-2002, 05:14 PM
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Join Date: Nov 2001
Location: Atlanta, GA
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Life of Valve guides

I am in the process of rebuilding an M103 300E engine and I am not sure whether or not I need new valve guides. There seems to be a little play between the valve and the valve guide but I do not know if it is too much. The engine had 100K miles on it. Can anyone help me out here?
George Carstens
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Old 07-28-2002, 08:18 AM
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A little bit of wiggle is normal. Just put seals in it.
I got too many cars!! Insurance eats me alive. Dave

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Old 07-28-2002, 08:35 AM
it leaks, its german
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If your building it, replace the guides. 103 guides last 100 to 150k miles. I had one set gone at 85k.

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Old 07-28-2002, 09:42 AM
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I would do them just because the 103s have a lot of swipe [side] force compared to engs like the 104s.
So they are just more prone to wear by valve train design....
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Old 07-28-2002, 12:27 PM
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Thankyou everyone for your help! I will be replacing them just to have a good solid engine.
George Carstens
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Old 07-29-2002, 07:03 PM
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This decision would be best left to a competent machinist. You have to have the valves ground and the head surfaced anyway. My 103 had 240,000 mi. and all mine were worn out and the shop replaced them.
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