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Labor Day Putting down your wrenches or time for MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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| | | Forums66 Topics128,018 Posts1,055,259 Members48,417 | | Most Online14,466 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!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I have a cracked block in my 235. Crack is in the deck, between cylinders. Blows water into the crankcase. Running a zero pressure radiator cap.
Spring of last year, following the advice of Jerry (thanks) I was able to stop the leak. Used Bar's Head Gasket Repair, which contains sodium silicate without a bunch of extra additives. Followed instructions, flushed, cleaned the infamous drain passage behind the exhaust. This held until a 100 mile round trip to the tractor show at Goessel Saturday. Coming home the oil pressure dropped and temp ran about 195*.
Any recommendations for a step higher on the sealer? I don't have money to build another engine right now.
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 | Are you getting coolant into the oil again? The sodium silicate cures best when it's exposed to combustion heat. You might want to try regular Bar's Leaks on that type of crack, the one that seals a leak with vegetable fibers and water-soluble glue. Eventually, you're going to need another block, or have the crack in the present one repaired professionally. A 4 lb. cap will force more sealer into the crack. A zero pound cap only uses gravity flow to get the sealer where it belongs. Warm up the engine with the 4# cap, then let it sit overnight without relieving the pressure. 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: Dec 2016 Posts: 80 'Bolter | | 'Bolter Joined: Dec 2016 Posts: 80 | I have used Moroso Ceramic Seal in the past, was recommended to me by a machine shop as a quick fix in a pinch. I've had pretty good luck with it but it is always a crap shoot.
1959 3204 Basic Cab
| | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | K-Seal. About $16.00 for an 8oz bottle. Does not matter if you have antifreeze or not in the system.
Had a cracked head or bad head gasket one on our 96 New Yorker. Put that in three years ago with the engine blowing coolant out the fill cap.
Three years later it still runs and not blowing coolant.
I've used it on some other problems for a cheap fix and it has held up.
Worth a try. | | |
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