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My BLUE FLAME compared to........ #338953 Mon Nov 19 2007 06:37 AM
Joined: Sep 2007
Posts: 21
R
RAT ROD GIRL Offline OP
Apprentice
I have an original 1934 1 1/2 ton blue flame six and purchased a 1935 passenger car blue flame six.

My question is......... What's the difference between these 2 engines and why does the 35 have a different valve cover configuration? Arent these 206's the same with interchangable parts? I have block numbers for both engines if someone can point me in the right direction.

Re: My BLUE FLAME compared to........ [Re: RAT ROD GIRL] #339120 Mon Nov 19 2007 09:46 PM
Joined: Jul 2006
Posts: 187
C
Clutchheadstew Offline
Wrench Fetcher
RRG- I have a '35 AND A '36 1.5 ton truck and the original 207's look excactly like my brothers '36 pass. car. I'm wondering if some engine swap out has taken place....?


'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.
Re: My BLUE FLAME compared to........ [Re: Clutchheadstew] #339137 Mon Nov 19 2007 10:20 PM
Joined: Apr 2005
Posts: 261
3
35 trucker Offline
Wrench Fetcher
There is a lot of differences between the 34 & 35 engines to name a few; location of ign. coil is on cowl in 34 and on the tappet cover in 35, 34 has splash oiling to rods, 35 has squirt tubes and splash, 34 has smaller water pump and hoses (1.25"), 35 a bigger pump and hoses (1.5"). Block on 34 has a boss on driver side middle (same block as car that uses this for engine mounting), oil distributor is different, bigger on 35, inside cylinder compression ratio is lower on 34 than 35, Harmonic dampener is different, 34 does not front crankshaft oil seal only a slinger, 35 has a cork seal, Valves and head are different with 33-34 being almost the same, 35 and 36 are the same. 36 is almost a new engine with full cylinder block cooling, 34-35 is only top half of cylinder water cooled, 36 has a bigger water pump and rear pump baffle is cast in instead of a pressed in as 34-35 are, distributor and oil pump drive tang is reversed in 36. The 36 engine was a replacement engine for the 35.

Last edited by 35 trucker; Mon Nov 19 2007 10:22 PM.

34 & 35 trucks are the greatest
Re: My BLUE FLAME compared to........ [Re: 35 trucker] #339147 Mon Nov 19 2007 10:37 PM
Joined: Apr 2005
Posts: 261
3
35 trucker Offline
Wrench Fetcher
I would suggest you get a Chevrolet parts book or if you like I can send you a complete spec. sheet for both or all three engines, The 35 & 36 engines share more parts then 34-35 engines. Casting numbers on 34 Master car and 34 Master truck 837231 (note the truck engine uses a Standard car intake manifold and has is not drilled for the LH side engine mount), 35 casting number is 837591 for all Standard, Master and truck engines. The casting number on the 36 engine is 886010. The 34 cylinder head will not work on a 35 or 36 block as the coolant holes are in different locations. Another way to tell if you have a car or truck eng. is to look at the stamped serial number behind the fuel pump Car starts with a number, 1/2 ton with a K, and 1.5 ton with a T.

Last edited by 35 trucker; Mon Nov 19 2007 10:37 PM.

34 & 35 trucks are the greatest
Re: My BLUE FLAME compared to........ [Re: 35 trucker] #339223 Tue Nov 20 2007 01:19 AM
Joined: Jul 2006
Posts: 187
C
Clutchheadstew Offline
Wrench Fetcher
Trucker you really know your stuff!! So the '36 may be a fair engine to mess with then as far as the evolution of stovebolt 6's goes. My brother is a 20 year veteran as a automotive machinist business owner and ownes 2 '36 coupes. He wants to dive into these 207's and see if he can massage and blueprint them. I own two '36 engines and a '35. I'd be interested in your spec sheets for sure. Was the 207ci ever called Blue Flame or was that in '53? Sorry to rob your post Rat Rod Girl but this info is awesome ......Rick


'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.
Re: My BLUE FLAME compared to........ [Re: Clutchheadstew] #339242 Tue Nov 20 2007 02:08 AM
Joined: Apr 2005
Posts: 261
3
35 trucker Offline
Wrench Fetcher
The 207 were never called blue flame. The 36 engine was the best of all the 207 cu.in. engines. Send me an e-mail with your postal address and I'll send you the information you want.


34 & 35 trucks are the greatest
Re: My BLUE FLAME compared to........ [Re: 35 trucker] #339318 Tue Nov 20 2007 05:21 AM
Joined: Jun 2007
Posts: 136
G
Grizzly 34s Offline
Shop Shark
Looks like all of my are 34 still, that was some helpful information. Thanks


"Save your's or someone else's Grandfather's CLASSIC TRUCK"
1934 1.5-Ton Big Bolts ~ Gallery page / Photobucket
Re: My BLUE FLAME compared to........ [Re: RAT ROD GIRL] #339360 Tue Nov 20 2007 07:46 AM
Joined: Sep 2007
Posts: 21
R
RAT ROD GIRL Offline OP
Apprentice
This doesnt look good...... cry cry cry

Looks like what I thought to be an original engine in my 1934 1.5 ton is looking to be something of a 1935 1/2 ton by what 35Trucker is saying. If 1934 passenger cars started with a #, and 1/2 ton trucks started with K, and 1.5 tons were T.........then my serial # that starts with a L leads me to believe this is a 35 1/2 ton truck motor..... cry....NOT A 34 1.5 ton.

I'll wait for 35Truckers engine specs before I go sob in the corner.



Re: My BLUE FLAME compared to........ [Re: RAT ROD GIRL] #339449 Tue Nov 20 2007 05:28 PM
Joined: Jul 2006
Posts: 187
C
Clutchheadstew Offline
Wrench Fetcher
Hey '35Trucker I've sent you a PM. Thanks.


'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.
Re: My BLUE FLAME compared to........ [Re: Clutchheadstew] #339477 Tue Nov 20 2007 06:37 PM
Joined: Apr 2005
Posts: 261
3
35 trucker Offline
Wrench Fetcher
Even though "blue Flame" was not used on the 207 cu.in. engine as such; 1935 was the first year Chevrolet used the name to describe the new 1935 cylinder head combustion chamber design. I don't have the first use on the words to describe the whole engine but I think it wasn't until the 235 cu.in engine was introduced. I know they advertised the 1941 though the war years as the "Victory" engine.


34 & 35 trucks are the greatest
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