MH44 No Leaks

David G · Jan 31, 2016

I ran the engine for about an hour with radiator cap loose, then shutdown, set valves and re-torque, ran with pressure on cap for an hour.

No leaks.

Important notice, the stud holes in a MH block are not standard, you must use a class 3 stud or it will leak, I wonder if other blocks are too.

David G · Jan 31, 2016

Here is follow up on thread classes

http://sizes.com/tools/bolts_inch_threadFit.htm

Fudd · Jan 31, 2016

Glad you got it figured out and hope it holds. Nice project.

Steve@Advance · Jan 31, 2016

Do you think the block threads came factory oversize? Or possibly someone accidentally retapped them with a H7 tap?

I can't imagine why they would come oversize. That is typically only for something that will be plated. The plating would bring the thread to standard size.

Interesting...

JD Seller · Jan 31, 2016

Dave if your like me the second you get it all together and painted up then it will leak some where. LOL

David G · Feb 1, 2016

The studs fit in the spare block just like the original block, so only thing I can figure is they were that way.

MH44 No Leaks

David G

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David G

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Fudd

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Steve@Advance

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JD Seller

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David G

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