Help: Need Engine Machining and Tolerance specs from the "builders"

[Sledheadxp800r]

Good luck getting that gear off. You will need a lot of heat and I would buy a new gear then.

I'm not saying its gonna make that much but I'm hoping :angel: :roflmao:

 

[super diesel]

Good luck getting that gear off. You will need a lot of heat and I would buy a new gear then.

To Henry's defense, I did use a pane torch on each side to help get it to swell outward some before pressing it off. I didn't use a whole lot of heat though. I put pressure with the press and then used heat till it popped (didn't take much). I had to press the gear on to the other crank and I used about the same amount of time heating on it as well.

 

[ripmf666]

To Henry's defense, I did use a pane torch on each side to help get it to swell outward some before pressing it off. I didn't use a whole lot of heat though. I put pressure with the press and then used heat till it popped (didn't take much). I had to press the gear on to the other crank and I used about the same amount of time heating on it as well.

My build was a budget build only keyed front 2. We only tryed pulling the gear off not pressing. The ones I have seen people take off you can see we're they used a lot of heat and I would of never reused those gears.

 

[Stingpuller]

Keys

With the tight fit I also agree you probably don't need to key the front but it could never hurt. I don't think HP has anything to do with the pin failing as much as the up and down in rpm to will kill them. I also think if it's never been apart(water pump,balancer) it's a lot less prone to fail.

 

[schulte]

There is nothing the natter with keying the Crank gear but it isn't going to break the pin that's there. If youve ever taken one off you will understand why.
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Disagree. I've seen stock motors with tuner only shear crank and cam pins. It's a relatively inexpensive job at a machine shop. Why wouldn't you?

 

[Jscherbs]

subd

 

[duratothemax]

To Henry's defense, I did use a pane torch on each side to help get it to swell outward some before pressing it off. I didn't use a whole lot of heat though. I put pressure with the press and then used heat till it popped (didn't take much). I had to press the gear on to the other crank and I used about the same amount of time heating on it as well.

If you stick the gear in the oven for an hour or so at a couple hundred degrees, it will drop (literally) right onto the snout of the crank with no pressing or hammering.

 

[super diesel]

If you stick the gear in the oven for an hour or so at a couple hundred degrees, it will drop (literally) right onto the snout of the crank with no pressing or hammering.

Good idea Ben.

 

[Sledheadxp800r]

If you stick the gear in the oven for an hour or so at a couple hundred degrees, it will drop (literally) right onto the snout of the crank with no pressing or hammering.

A toaster oven usually works pretty good for heating press fit gears. Makes it a breeze to install them. 45 minutes at 450* works mint. As Ben said they pretty much slide on. This is also the correct way to install them.