Seized 235; crankshaft bolt question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fslay · 01-01-2007, 09:26 PM

The '62 C10 I bought has a 235 engine and has set up for about five years. I put a hot battery on it and the starter engages when I hit the ignition, but the engine won't turn over. I sprayed WD-40 down all six spark plug holes, but still no movement. Usually, I put a 1/2 inch rachet/socket on the crank pulley bolt, but mine doesn't seem to have one. Does anybody know what size/thread bolt I need to get? Is there something else I might have overlooked on getting it started?

jeffspower · 01-01-2007, 10:53 PM

I don't think any of the 235's had a threaded hole- just a dimple in the center of the crank. The '58 235 I rebuilt a few years ago didn't. I tried drilling a hole, but the crank was HARD steel. The angle of the dimple & the drill bits I had were different enough it would knock the cutting edges of the bits right off. And I had the engine on a stand out in the open. I think it is something that would have to be done on a lathe with an endmill or something.

WD-40 isn't good for much IMO. I'd try PB blaster or Gibb's. You should be able to take the flyheel cover off & work it from there. I had an old V8 Ford flathead that went thru a flood & then sat a year or better before messing with it. We pulled it around on concrete dumping the clutch and it wouldn't budge- just drag the tires. I screwed the plugs out, sprayed in some good stuff, waited a month or so & it cranked over with the starter.

fslay · 01-02-2007, 02:59 PM

I did go back and spray PB Blaster down the spark plug holes. Several people told me that the WD40 will eventually evaporate, but the PB has some oil in it that stays around for a while. I eventually plan to go with either a 283 (kinda era-correct), or either a 500 Cadillac (cool to me). I would like to drive the 235 for a while, though.

Chevyboy1962 · 01-02-2007, 03:24 PM

The 235 does not have any threads in the crank, the only way I can think of to crank the engine over it to pull it in gear. PB Blaster, or Marvel mystery oil down the cylinders, and wait a week. Then pour some more down the cylinders again, wait another week, and you should be ready to rock. I did this on a '55 Dodge truck I had with a 241 Poly.
David

**Chevy Fleetside** · 01-02-2007, 06:20 PM

Put Trany fluid in the cylnder holes also.. That will also free it up and it doesn't cost much...

01-01-2007, 09:26 PM	#1
fslay Registered User Join Date: Nov 2006 Location: Mississippi Posts: 39	Seized 235; crankshaft bolt question The '62 C10 I bought has a 235 engine and has set up for about five years. I put a hot battery on it and the starter engages when I hit the ignition, but the engine won't turn over. I sprayed WD-40 down all six spark plug holes, but still no movement. Usually, I put a 1/2 inch rachet/socket on the crank pulley bolt, but mine doesn't seem to have one. Does anybody know what size/thread bolt I need to get? Is there something else I might have overlooked on getting it started?

01-01-2007, 10:53 PM	#2
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: Seized 235; crankshaft bolt question I don't think any of the 235's had a threaded hole- just a dimple in the center of the crank. The '58 235 I rebuilt a few years ago didn't. I tried drilling a hole, but the crank was HARD steel. The angle of the dimple & the drill bits I had were different enough it would knock the cutting edges of the bits right off. And I had the engine on a stand out in the open. I think it is something that would have to be done on a lathe with an endmill or something. WD-40 isn't good for much IMO. I'd try PB blaster or Gibb's. You should be able to take the flyheel cover off & work it from there. I had an old V8 Ford flathead that went thru a flood & then sat a year or better before messing with it. We pulled it around on concrete dumping the clutch and it wouldn't budge- just drag the tires. I screwed the plugs out, sprayed in some good stuff, waited a month or so & it cranked over with the starter. __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

01-02-2007, 02:59 PM	#3
fslay Registered User Join Date: Nov 2006 Location: Mississippi Posts: 39	Re: Seized 235; crankshaft bolt question I did go back and spray PB Blaster down the spark plug holes. Several people told me that the WD40 will eventually evaporate, but the PB has some oil in it that stays around for a while. I eventually plan to go with either a 283 (kinda era-correct), or either a 500 Cadillac (cool to me). I would like to drive the 235 for a while, though.

01-02-2007, 03:24 PM	#4
Chevyboy1962 C10 now is a GMC Join Date: Jun 2003 Location: Modesto, Ca Posts: 740	Re: Seized 235; crankshaft bolt question The 235 does not have any threads in the crank, the only way I can think of to crank the engine over it to pull it in gear. PB Blaster, or Marvel mystery oil down the cylinders, and wait a week. Then pour some more down the cylinders again, wait another week, and you should be ready to rock. I did this on a '55 Dodge truck I had with a 241 Poly. David __________________ 1962 C10 swb fleetside, big window, custom cab 350/TH350 combo...Hot Rod 1963 C10 lwb fleetside, small window 230/4 speed...Blvd Cruiser *1931 Ford 5 window coupe (soon to be Hot Rod)... Father & Son project

01-02-2007, 06:20 PM	#5
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,782	Re: Seized 235; crankshaft bolt question Put Trany fluid in the cylnder holes also.. That will also free it up and it doesn't cost much...

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