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Mod | | | Forums66 Topics128,075 Posts1,055,919 Members48,429 | | Most Online14,466
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| | | | Joined: Sep 2010 Posts: 16 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2010 Posts: 16 | Hello and fist off thank you to everyone who responded to my earlier post about thinking of buying a 1951 GMC 350 2 ton. I bought the truck and she limped home at 15mph up hill. I first checked the plugs and found she was running on 4 cylinders. I replaced the plugs and wires and she ran great. Good power uphill and steady 55mph on the freeway. Last night she had enough and broke down on the freeway. First she started loosing power (back to 15mph uphill) I downshifted to second gear and she gave out. Now when I try to start her the whole truck shakes and rattles violently so I quickly turn it off. Any suggestions out there are greatly appreciated. Thanks.
-Yori | | | | | Joined: Sep 2010 Posts: 16 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2010 Posts: 16 | So, I took the engine apart and found that the piston connecting rod had broken. Now just looking for parts.
Thanks | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | That's no fun,
Consider swapping another good running engine instead of rebuilding what you have. It may or may not cost less.. depends on your luck. Properly rebuilding what you have, if it is rebuildable, can be in the $2,000 range.
Grigg | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Depending on your needs, up to a GMC 302 will fit in there, so it might be worthwhile to hold out for one, might have a 270 now? They all look the same(228-302) on the outside.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Sep 2010 Posts: 16 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2010 Posts: 16 | I've been looking around, does anyone have a source for engines?
Thanks | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Old farm trucks, like yours, running or not, many wrecking yard people won't know what you are talking about, just have to dream up some other reason to get into their yard and look around for yourself. GMC engines have the displacement as the first 3 numbers of the ser. no., starboard side, STAMPED on a machined pad, behind the distr.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jun 2009 Posts: 98 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 98 | Try Larrowe and Son truck parts [email protected]They have been a great help with knowledge and parts for me and my 49 GMC COE. All they do is 6 cyl GM and Chev engines. Stock or modified | | | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | Good power uphill and steady 55mph on the freeway. Last night she had enough and broke down on the freeway.
Any suggestions out there are greatly appreciated. Thanks.
-Yori dont be thrashing it down the freeway, unless you just spent lots of dead presidents on a new motor and even though i did in all my trucks i only run mine at 50 down the free way. the reason i say this is i was in your shoes once and its not fun when your far from home. go over to oldgmctrucks. there are people there in your neck of the woods that might be able to help you out at a reasonable price. | | |
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