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Author Topic: Dimension of M129 Valve and Valve Stem  (Read 2435 times)

Jack the Knife

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Dimension of M129 Valve and Valve Stem
« on: March 10, 2023, 23:25:40 »
Does anyone have these measurements handy for a port/polish job I'm outsourcing?
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1964 230SL "Blue Note" -- #009785
2015 G550 "Milk Truck"

DaveB

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Re: Dimension of M129 Valve and Valve Stem
« Reply #1 on: March 11, 2023, 01:57:32 »
valve specifications
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DaveB
'65 US 230sl 4-speed, DB190

Jack the Knife

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Re: Dimension of M129 Valve and Valve Stem
« Reply #2 on: March 11, 2023, 02:35:55 »
Perfect! Thank you, Dave! The 250SE specs will work, as the M129 head is from a 250SE/M129 anyway.
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1964 230SL "Blue Note" -- #009785
2015 G550 "Milk Truck"

Benz Dr.

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Re: Dimension of M129 Valve and Valve Stem
« Reply #3 on: March 12, 2023, 04:30:21 »
Make sure they don't touch the throat below the valve seat too much. I find port matching to be of benefit.
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1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn
1966 230SL 5 speed
1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1990 560SEC
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