Motor Mount Repair with DIY Welding Techniques

Motor mount repair of cast iron automotive or heavy machinery can be challenging without the right tools.

In this customer testimonial video, watch Jamie Scheld’s success using 77 STICK/TIG welding rods to repair a 96 GMC K2500 4X4 Extended Cab, Long Bed with a 3 Inch Lift and a 5 Speed New Venture 4500 Manual Tranny.

Jamie sent a series of photos showing the motor mount repair process, and shared:

“These Muggy Weld 77 Cast Iron Rods are great because they helped me fix a broken engine mount casting in the block of my 94 Dodge 5.9 Cummins 12 Valve Straight 6 Diesel Engine that I put into my work truck. I got sick of my GM 6.5 Turbo Diesel Engine not because it’s a bad motor, it’s actually a decent motor, but it just isn’t in the same league as the Dodge 5.9. The truck now RIPS pretty damn good! Snaps your head back, even in 5th gear!

Nonetheless, the Muggy Weld 77 Cast Iron Rods worked excellent! The rods were VERY easy to weld with and produced a nice, strong new base metal in the block that I could tap and drill. I followed the advice Mike at Muggy Weld gave me beforehand, which wasn’t rocket science and was straightforward for anyone who is a decent arc welder. Not complicated at all.”

During the motor mount repair process, Jamie demonstrated exceptional attention to detail while restoring the damaged motor mount casing. To achieve the best possible result, he welded and ground down the new motor mount multiple times, refining both is technique and the final shape of the repair. Each pass was carefully evaluated to ensure proper alignment and structural integrity.

After several meticulous attempts, Jamie successfully ground the repaired area down until it was perfectly flush with the other three motor mount perches. This level of precision was critical to the overall motor mount repair, as even a small inconsistency could lead to engine movement or log-term vibration issues. Jamie explained that his goal was to make the new engine mount perch sit exactly level with the others so that, once bolted in place, the engine mount would remain stable and secure.

By ensuring there was no excess space behind the mount and eliminating any chance of rocking or flexing, the completed motor mount repair provides a solid foundation for the engine. This careful welding and grinding process highlights how challenging yet essential precision work is when performing a proper motor mount repair that will last under real-world driving conditions.

Jamie concluded his successful cast iron motor mount repair story with:

“I finally got it ground level and flush, and the new mount bolted up excellent. Nice and strong! Very pleased with the job! Thanks, MuggyWeld!

I hope the pics are pretty self-explanatory, and yes, I was using a bolt screwed into the adjacent mount perch as a drill guide to keeping me drilling straight! I hope the pics are worth a thousand words!”

Jamie Scheld

Thanks, Jamie, for sharing your experience using 77 electrodes for this cast iron motor mount repair project.

Disclaimers:

Please visit https://www.aws.org/Standards-and-Publications/Free-Resources/#YourResources prior to using our welding products, and adhere to all AWS welding safety guidelines.

Further product safety information is available at https://muggyweld.com/safety-guidelines

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MSDS sheets available with purchase from MuggyWeld.com, upon request.

Updated 12/25/25