Make the Crank a Little Better
- Thread starter Ron Nielson
- Start date
I dont get it? Keying the crank and cam is basic Duramax engine building tech? What am I missing?
It took this engine builder 20 years to realize this was something Eric Merchant and Guy Tripp were doing in 2004?
It took this engine builder 20 years to realize this was something Eric Merchant and Guy Tripp were doing in 2004?
Don't worry Tom, Ford Decided to 1 up them on the 6.7 because pins and keys cost money....
Source: https://youtube.com/shorts/4hqbdDLsxR8?si=qs_YZka4NxmIIYbO
Wow. Never would have thought. Pressed parts can be held extremely tight. But on an engine that is subject to heat cycling. Never a good idea. Not sure I like the idea of welding it on. Next guy who has to remove it to service the engine is going to curse loudly. Would have liked to see a keyway myself. But more work
Yeah, I agree. If it's not coming apart, kind of hard to do a key way or some type of mechanical type bond.
I also don't think it needs that much weld either...
How well would loctite hold in this application?
If doing in place, a pin hole could be drilled and the gear since it's already removed could be broached. Wouldn't be as strong as a key but still better then stock and can be done without removing the crank
Edit, just looked again and I'm thinking if you broach the gear you'll severely weaken it. Unless you can do a smaller key or something minimal so as to not take too much material from the gear
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Sleeve retaining compound is pretty strong... But not sure I want to rely on that for crank shaft timing. We usually have to heat it up to pull the gear off for an application at my old job. but the gear and shaft are much smaller.
You could do a shallow broach but I believe there is enough material there for a standard one.
I didn't have a broach for my Oil pump so we used a Wire EDM to cut the slot on my oil pump gear for my engine.
I'd go for a shallow broach key of it was me. Standard just seems like too much material taken out of the gear.
I'm a big fan of tapered bushing sheaves/pulley mounting. Those things hold better then any key will without cutting into the shaft. Unfortunately it looks like that would take too much room also. From the looks of it, those ford engineers designed themselves into a corner. Ended with the gearing on the crank being too small to have much else to hold it other then press fit. If they where actually smart, they would have made that gear integral to the crank as in one piece. No way that would slip. Cost is probably the real reason for doing what they did. Unfortunately they will likely pay for it on the backend with warranty issues
It's not the only engine Ford has done that on. My uncle bought a focus with the 1.0L 3cylinder engine. Can't even do the timing belt with out a special tool kit... at 65k miles it's apparently on its 3rd engine which I installed earlier this year...
That was my thought. It's been done on all engine platforms for decades.
This "Dave's Auto" guy is a real piece of work in general. Like telling people NOT to let their diesel trucks warm up at all regardless of outside temp............