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Big Block Talk! Everything about swapping a big block engine into your cart!



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Old 10-03-2023, 11:59 AM   #11
KOZ45
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Default Re: Help help, Duramax 440 thread pitch?

Beyond silly that they couldn't determine the threads inside the shaft
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Old 10-03-2023, 07:22 PM   #12
Barrysuperhawk
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Default Re: Help help, Duramax 440 thread pitch?

Well, I did ask, in fact almost every post I have made on this site is about the engine, LOL. I know beyond the shadow of a doubt that I could not have completed this myself.

There are 2 shops near me and they are both worthless, not wanting to work on my old car. One only wanted to sell me a new one, the other just didn't want to bother with it so quoted me "F-you go away" prices ($125 to mount a tire I brought in, estimated $6-8000 to swap the motor)

So, I took it to a golf cart shop a bit over an hour away who showed me other carts he had swapped motors in. When I brought it to him, I had already injured my shoulder, and was between the injury and the surgery, so I told him to take his time because I knew I wasn't going to be able to pick it up for a few months and he was totally cool with that. He also asked me to bring the motor, and he would take care of all of the other parts required to make it go.

Fastforward to when I posted this thread, both the shop and I had had alot of life happen, but we are down to the "last bolt" as requested above.
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Old 10-04-2023, 02:31 PM   #13
slonomo
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Default Re: Help help, Duramax 440 thread pitch?

If it's one single bolt left to install then sounds like you should be driving in no time. 3/8 -24 is the size I come up with. If older ones used metric then I couldn't tell you. But it's pretty easy to try different sized bolts and know if they are correct. It's also easy to look at the threads and visually see if they are cross threaded. It's also easy to use a good tap to clean up the threads. Those are your options as I see them. Any experienced mechanic should know all this. Maybe have your mechanic come to this forum and check this info out? But if they mechanics you are using are no good or don't want to work on your cart, you might be up a creek. That's a sucky situation to be in.

Your cart is pretty old, and most mechanics don't want to get into a basket case situation, can't really blame them, lots can go wrong. It can end up costing you far more money than upgrading to a newer cart and actually start enjoying the cart immediately. It's the same as with a car, sometimes it's better to upgrade if you aren't able to fund the repairs, find mechanics that are good and willing to help, or aren't able to make the repairs yourself. Many of us on this forum buy old broken carts and fully rebuild them, so we know how all that goes. Hope you get your cart back soon. Good luck!
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Old 10-14-2023, 12:29 PM   #14
Barrysuperhawk
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Default Re: Help help, Duramax 440 thread pitch? SOLVED!

Oh darn, I *just* realized I cannot edit my original post to reflect this is solved! I went and spoke to the shop the other day and they have solved the bolt issue.

It was not really clear if the initial bolt was actually the wrong one or if it was just wildly out of spec, since the mechanic was mad and apparently threw it...
But since the shop "thought" the original bolt was the right one and it didn't fit, that got them onto looking for something different. We got another one of the proper bolts and the new one fit perfectly. So, apparently there are only a couple of other things to sort out and my cart will be done.
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Old 10-14-2023, 01:14 PM   #15
slonomo
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Default Re: Help help, Duramax 440 thread pitch?

Glad they finally used their heads. Hopefully you'll be cruising in no time.
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Old 10-18-2023, 09:23 AM   #16
sho305
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Default Re: Help help, Duramax 440 thread pitch?

My stock G9 yamaha was a 3/8-24 and now with a comet clutch and lifan clone the same bolt is holding the clutch on. Both taper fit, use a collet on the straight shaft now. However the comet has internal threads some odd size I had to find in order to pull the clutch off. Its 9/16 or 5/8 fine thread iirc.
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