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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Nov 2020 Posts: 2 Moderated | | Moderated Joined: Nov 2020 Posts: 2 | rear core plug is bad, had mass amounts of coolant leaking, looking for the best way to replace the plug without pulling the engine, its a 71 chevy 250 with a powerglide trans, actually in a el camino | | | | | Joined: Feb 2004 Posts: 29,837 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,837 | Is there room for a rubber expansion plug? They're simple to install if you have enough depth behind the plug for the rubber and the washer to fit properly. Then just tighten the nut until the plug seals the opening.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jan 2006 Posts: 29 'Bolter | | 'Bolter Joined: Jan 2006 Posts: 29 | Do yourself a favor. Pull the engine and replace them all. If one has rusted through the others are not far behind. Shouldn't have to do it again for another 39 years! | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | One of the hazards of tropical climate not requiring antifreeze.
Ed
'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: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | If this is the rear most plug just inside the bell housing area I don't see any other way to get to it than either pull the engine or transmission and flywheel to replace it.
And as already suggested, replace them all at once. | | | | | Joined: Feb 2004 Posts: 29,837 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,837 | Use brass plugs, not steel. They last a lot longer.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jan 2006 Posts: 29 'Bolter | | 'Bolter Joined: Jan 2006 Posts: 29 | Use brass plugs, not steel. They last a lot longer.
Jerry Jerry is right but at my age steel will outlast me. I hope! | | |
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