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Author Topic: W187 M180 cylinder head  (Read 1507 times)

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Offline bilgummi

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  • Year_Model: 1951 220 Cab A *** 1952 220 Sedan***1951 220 Sedan***1952 300***1959 300
W187 M180 cylinder head
« on: August 04, 2013, 02:35:22 PM »
I am trying to make a engine of lots of engine parts I have collected for several years. I  have cylinder head made of aluminium and  of cast iron. Both are restoreable.  Which would you people prefer to use? 
« Last Edit: August 04, 2013, 02:37:19 PM by bilgummi »

Offline Scott Montoney

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  • 1952 - 220 Cab B
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  • VIN #: 187.013.04370/52
  • Year_Model: '52 220 Cab B
Re: W187 M180 cylinder head
« Reply #1 on: August 05, 2013, 08:25:48 AM »
In my opinion, the aluminum head should be used for a couple of reasons. 
One - it will have a higher compression ratio than the cast iron.
Two - My service manual specifically states that the cast iron heads should be replaced with the "light weight" (aluminum) head when in for service. I believe the cast iron heads are prone to cracking.
« Last Edit: August 05, 2013, 08:28:43 AM by Scott Montoney »
"Gertrude" a.k.a. "Troidl"
1952 - 220 Cabriolet B

Offline Henry Magno

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Re: W187 M180 cylinder head
« Reply #2 on: August 05, 2013, 10:15:08 AM »
I agree. There are low compression aluminum heads, either 6.5 or 6.8, but you can use the 7.6 or 8.7. It's better to use the matching camshaft, marked 14 or 14/1 for the 7.6 and 33 for the 8.7(on the rear face of the rear journal).

Offline Scott Montoney

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  • Interior color: Red
  • Location: Mason,Ohio USA
  • VIN #: 187.013.04370/52
  • Year_Model: '52 220 Cab B
Re: W187 M180 cylinder head
« Reply #3 on: August 05, 2013, 06:43:39 PM »
Also make sure you get the correct matching head gasket.  The original parts manual may only list the gasket for the cask iron head.  the opening for the combustion chamber is of a different shape for the different heads.
"Gertrude" a.k.a. "Troidl"
1952 - 220 Cabriolet B