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| | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | My 235 has a crack in the block between cylinders. After occasional runs for several years the leak is worse. It is now showing in the crankcase.
What is a sealer I can try that will not plug the radiator? I only drive her once every month or two.
Fred
52 3600
69 C-10
| | | | | Joined: Feb 2004 Posts: 29,740 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,740 | Try "water glass" (Sodium Silicate). It's available in quart bottles on Ebay at pretty reasonable prices. It's a very effective sealer on low-pressure cooling systems. I managed to seal a seep leak from the head gasket on the 503 GMC engine that I drove from Tennessee to the reunion in KC last summer, and Ed Pruss drove it on to Denver without any problems.
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: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | And I added 50% antifreeze for protection and still OK.
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 | Local drug stores sells liquid glass.
Also a product called K-Seal works very well to seal cracks. And it mixes with antifreeze that's already in the system.
Added it to our Chrysler 3 years ago due to small leak in head gasket, still running.
| | | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Try "water glass" (Sodium Silicate). It's available in quart bottles on Ebay at pretty reasonable prices. It's a very effective sealer on low-pressure cooling systems. I managed to seal a seep leak from the head gasket on the 503 GMC engine that I drove from Tennessee to the reunion in KC last summer, and Ed Pruss drove it on to Denver without any problems.
Jerry Using my inner google-foo I was able to find that Bar's Head Gasket Repair contains sodium silicate without a bunch of extra additives. Cost is $11 locally, which isn't much more than e-bay. http://barsleaks.com/product/head-gasket-repair/Now to flush the system and disconnect the heater. Thanks to Jerry & others.
Last edited by Fred T; 04/15/2016 4:50 AM.
Fred
52 3600
69 C-10
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