[J Pitt]

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[Klintel]

[teknohog]

If a engine block develops a crack, JB Weld can be used to seal up the crack and prevent the crack from sucking in air or leaking coolant. JB Weld is a type of epoxy that seals and hardens to close cracks and holes. JB Weld is made up of a resin and a hardener. When the resin and the hardener are mixed together, they form a sealant that can be used on the damaged area. Once the hardener begins to harden inside of the resin, the epoxy forms into a solid weld inside and around the damaged area.

[Calvin870894]

Slide the flat scraper under the mixed epoxy and spread the epoxy into the crack first. Press the metal scraper downward to force the epoxy into the crack. Apply the remaining mixed epoxy to the one- to two-inch area around the crack. Be sure to press the epoxy into the crack and around the area of the crack with the scraper. Leave the JB Weld on the cracked area over night to ensure it will be hardened.

[nina08]

Wipe away all of the paint, rust and dust off of the crack and the surrounding surface. There should be no paint or rust left on the area around the crack. Once the area has been properly brushed and wiped clean, apply a generous amount of rubbing alcohol to a clean rag. Wipe down the entire area around the crack and inside the crack. Wait a couple of minutes for the alcohol to dry. [links]

[Bitcoiner]

Re: The best epoxy/jb weld for exhaust side block externel crack

[l0v3m32df]

Right well all i wanna do is get it through this season and maybe next because i know i can get a new long block for $1500 which is a pretty good deal considering I only have half that in the boat and trailer

[manixrock]

and if you are not loosing water, oil, or no water in the oil or vice versa then prep the area and use the high temp product. Most epoxies get soft over a couple hundred degrees if they aren't designed for High Temp. applications more

[Pascual99]

Re: The best epoxy/jb weld for exhaust side block externel crack here

[Delia]

Thanks to those who helped educate me on this subject. I really appreciate it. more

[PinkyCandice7x]

It depends on the Crack,+ Where it Is.

[sgtstein]

EDIT by Don S
Keep it civil and stick to the question at hand.

[kahealani]

And there's Stitching with Pins.
But again. It's All about the Crack,+ Where it Is.