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We are still asking:
What did you
get done on
your Bolt today
????
The question, initially posted May 23, 2005, was:
"Whatcha do on your Bolt
this weekend?"
After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.
Now with pictures
and No BOTS.
So ...
What did you get done on your Bolt today????
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'
Oh Lord, I just gotta find it....
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Forums60
Topics127,506
Posts1,032,018
Members45,793
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Most Online1,229
Jan 21st, 2020
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 1953 261 block info?Update//
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Joined: Aug 2017
Posts: 605
OP
'Bolter
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I found a local ad for a 261 block (just complete block no head) for sale. Did they make a 1953 full pressure 261? I'm waiting on cast engine number when he gets home. Also should it have the small "steam" hole sets, or did that depend on the head used on it? What else should I be looking or asking on it before I drive 2 hours to look at it. He said it has a set of Chevron stripes and is .40 over now. Going to replace my 1950 216 very cracked engine. Looking for a 235 but this just came on the radar. Any information on the 261 would be greatly appreciated. Under a few of the older forums I found a link but it shows 1954 261 and up cast info, NO 1953.
/// He said serial # is 1AO5I0533. Make any sense?
Ok. Sent me pictures: Date Code H203. Casting # 3701481.
Last edited by Shaffer's1950; Sat Dec 09 2017 03:10 AM.
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Re: 1953 261 block?
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Joined: May 2006
Posts: 8,490
Master Gabster
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No, there were no '53 261s. If it is indeed a '53 engine with captains bars (chevron stripes), it most likely is a 235 from a Powerglide equipped passenger car, as they also used those markings. A '53 Powerglide 235 will be a full pressure engine.
Bill Burmeister
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Re: 1953 261 block?
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Joined: Aug 2017
Posts: 605
OP
'Bolter
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Ok, that's what research is saying. So I would have to Mic the cylinder Bore to confirm 235 unless he is off on the year. Also have to wait to get block cast #'s. Thanks.
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Re: 1953 261 block?
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Joined: May 2006
Posts: 8,490
Master Gabster
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You might see if he can get you the serial number stamped by distributor as well.
Bill Burmeister
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Re: 1953 261 block?
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Joined: Sep 2011
Posts: 1,102
'Bolter
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261 have another cast bar (1) on the L.H. side of the block near the head mounting surface near the center of the block. Also coolant passages (about 3/16" dia.) in block between cylinder 1-2, 3-4 & 5- 6. No 235 will have these coolant holes in block.
BC
1960 Chevy C10 driver 261 T5 3.73 dana 44
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
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Re: 1953 261 block?
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Joined: Jan 2000
Posts: 2,200
'Bolter
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Sounds like a motor I have, picked it up thinking 261 per Captain's bars but it's a '53 235 PG motor, still a good find.
Best of luck
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Re: 1953 261 block info?
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Joined: Sep 2001
Posts: 31,520
Bubba - Curmudgeon
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They made high-pressure 235s in 1953 for Powerglide equipped cars/including Corvettes. BC59's suggestion is the best in determining if you have a 261 ( 6 small holes as shown here). 261s supposedly did not become available until 1954 models. Find and post all the casting codes: block casting code and block date casting code.
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