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'31 Coach engine, couple ?'s #231318
01/19/12 01:21 AM
01/19/12 01:21 AM
Joined: Apr 2009
Posts: 1,966
Nova Scotia, Canada
Gunsmoke Offline OP

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Gunsmoke  Offline OP

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During preparing engine in my '31 Coach, I discovered head is stamped C 30 9, and I knew block is H 30 16, suggesting both are 1930 pieces. Transmission and brake/clutch assembly is also 1930. When ordering parts for engine components, is there any difference between '30 and '31 that I need to know. Secondly, what are restorers using to finish intake/exhaust manifold? Mine is quite rusty but restorable.

The Filling Station 1929-32
Re: '31 Coach engine, couple ?'s [Re: Gunsmoke] #231325
01/19/12 02:01 AM
01/19/12 02:01 AM
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merrimack nh
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When ordering parts I would order by model year unless part specifically list production dates. In regards to manifold paints I would use std engine enamel for the intake and a high temp paint for the exhaust. There are various sources for "high temp cast iron gray" paints, but I simply used a paint from a stove shop.


Steve D
Re: '31 Coach engine, couple ?'s [Re: Gunsmoke] #231327
01/19/12 02:10 AM
01/19/12 02:10 AM
Joined: Nov 2001
Posts: 16,692
The Great State of TEXAS
Chipper Offline

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The head date code indicates a '29 C = March, 30 = 30th day 9 = 19X9. If so the head will have intake and exhaust valves the same size. If intakes are larger then it is a 1930 or later.

The block being H 30 16 is a mystery. H 30 1 would be an Aug. 1931. It would have 836409 casting number. If it has 835501 then it would be a '29 or '30.

The 1929 or 1930 clutch housing is stamped steel and the transmission has several bolts in a U shape holding to the clutch housing. The 1931 has a cast iron clutch housing and only four bolts holding the transmission to it.

Most sand blast the manifolds, paint the intake with engine paint and use a high temperature coating for the exhaust manifold. Originally both were painted engine color on the assembled engine. The paint on the exhaust manifold quickly burned off.


Last edited by Chipper; 01/19/12 02:35 AM. Reason: Change 935501 to 835501

How Sweet the roar of a Chevy four!
Re: '31 Coach engine, couple ?'s [Re: Chipper] #231337
01/19/12 02:34 AM
01/19/12 02:34 AM
Joined: Nov 2001
Posts: 28,715
Eagle Point, Oregon
Junkyard Dog Offline

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Eagle Point, Oregon
The block casting number for 1929 and 1930 is 835501, not 935501.

The exhaust manifold can also be powder coated with the high temp. process, and some powder coating places even have a dark blue-gray that is close to the original engine color.

If you determine that the engine in your car is incorrect then when ordering engine parts and the like, go by the year of the engine rather than the model year of the car.

laugh wink beer2


The Mangy Old Mutt

"If It's Not Junk.....It's Not Treasure!"
Re: '31 Coach engine, couple ?'s [Re: Junkyard Dog] #231338
01/19/12 02:37 AM
01/19/12 02:37 AM
Joined: Nov 2001
Posts: 16,692
The Great State of TEXAS
Chipper Offline

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Thanks for noticing the error. Have corrected it the text since it was less than an hour from initial post. That now makes part of your post irrelevant or confusing. Sorry, well maybe not. HA HA.


How Sweet the roar of a Chevy four!
Re: '31 Coach engine, couple ?'s [Re: Chipper] #231341
01/19/12 02:43 AM
01/19/12 02:43 AM
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Posts: 28,715
Eagle Point, Oregon
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Yep, I saw that you made the correction of the casting number in your post. Actually, it doesn't make part of my post irrelevant since you stated why you edited your post. yay

laugh wink beer2


The Mangy Old Mutt

"If It's Not Junk.....It's Not Treasure!"
Re: '31 Coach engine, couple ?'s [Re: Chipper] #231342
01/19/12 02:43 AM
01/19/12 02:43 AM
Joined: Apr 2009
Posts: 1,966
Nova Scotia, Canada
Gunsmoke Offline OP

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Gunsmoke  Offline OP

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Sorry for confusion Chipper, block is H 16 0, August 16 1930. So I guess I have a '29 head on a '30 block/tranny in a '31 body/chassis. Oh well, at least it's all Chevy! Seems to work well, but ordering parts I'll have to let FS or others know, and I do have the parts book to confirm just what was common '29'to'30. Thanks for advice on manifolds, bought some "header flameproof" flat black but will likely return it and see what else is available.

Re: '31 Coach engine, couple ?'s [Re: Gunsmoke] #231343
01/19/12 02:46 AM
01/19/12 02:46 AM
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Eagle Point, Oregon
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You might want to consider changing your engine to a 1931 since that engine is better than a 1930 block with a 1929 cylinder head. At the very least you should consider replacing the 1929 cylinder head with a 1930-31 cylinder head.

laugh wink beer2


The Mangy Old Mutt

"If It's Not Junk.....It's Not Treasure!"
Re: '31 Coach engine, couple ?'s [Re: Junkyard Dog] #231384
01/19/12 01:40 PM
01/19/12 01:40 PM
Joined: Apr 2009
Posts: 1,966
Nova Scotia, Canada
Gunsmoke Offline OP

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I'll keep this in mind. Not easy finding or paying for replacement engines, and if I go to a '31 engine I would also need to swap out transmission and brake/clutch pedals. I realize there may be slightly less power in the combo I have. I removed head 2 years ago, replaced some burnt valves, ground the others and seats, replaced the rocker arm shafts (one was broken in center) new valve springs, keys, wicks etc. Also replaced carb and installed 6v electric fuel pump(I now have a rebuilt original ready to install). Started up well and tuned up nicely. Have not had for a test drive other than around yard. Assuming car is for 30MPH cruises, what might I find problematic?

Re: '31 Coach engine, couple ?'s [Re: Gunsmoke] #231395
01/19/12 03:00 PM
01/19/12 03:00 PM
Joined: Nov 2001
Posts: 16,692
The Great State of TEXAS
Chipper Offline

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The combination you have should work just fine. The amount of increased performance with a legit '31 engine is not worth the effort and expense. Either will power your car to 50-55 mph which is faster than most feel comfortable but your car is fully capable of for extended driving.


How Sweet the roar of a Chevy four!
Re: '31 Coach engine, couple ?'s [Re: Chipper] #231442
01/19/12 09:07 PM
01/19/12 09:07 PM
Joined: Apr 2009
Posts: 1,966
Nova Scotia, Canada
Gunsmoke Offline OP

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Gunsmoke  Offline OP

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Nova Scotia, Canada
Thanks Chipper and Dawg for your insight. The motor is obviously a "Heinz", it has a '29 Head, '30 Block, 4 blade fan (should be 2?), after market Tillotson Carb, '31 Air Cleaner, just to name a few. Hopefully once I get it on the road it will all work like Ketchup!


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