[HDwiring]

Has anybody installed knuck uppers on pan lowers? Just wondering? Can it be done? thanks ahead Bill

 

[Rubone]

Bill,
Yes, it involves moving a head bolt. Done many times. But you will incur the wrath of the Knuckle purists so tread lightly!
Robbie

 

[Destralo Roach]

Yes you can, but you need to plug and drill the heads for the pan barells, one head bolt is off, been done before back in the day.

And putting knuck top end on a pan lower requires sone welding and drilling to the cases for the oil return........Roach.

 

[iiggii]

Used to be done all the time before you could get after market knuck jugs guys would use pan jugs more around, All you had to do is drill one new hole even in to part of the old hole and thred. I just put one back to stock. Why would you need to do it today no need to.

 

[cliffe47]

The Knuckles have a different oil return from the top end being through a vacuum created in the bottom end extending up through the pushrod tubes and into the alloy housings. This vacuum then draws the oil from the bottom tins through the lines into the housings where gravity does the rest. Panheads oil returns through the barrels, Knuckleheads through the pushrod covers. There is more to it than the one offset headbolt deal, and breather valve or your top end oil wont return.

 

[MarkRado]

could always tap the heads for external drains if you really wanted to?

 

[ryangobie]

As stated its pretty involved. You could buy a knuckle for 7000 or buy a pan for 3000 and a set of knuckle heads and lifter blocks for 2500 and put another 1000 or so in machine work. You really aren't coming away ahead of the game.

 

[Stinky Pete]

I remember seeing a writeup of Knuckle top end to Pan/Shovel in the Geokan/Arman Chopper Cookbook. I'd have to look later today for the details. Might be a good place to start...the book's worth having anyway.

 

[JPP]

I remember seeing a writeup of Knuckle top end to Pan/Shovel in the Geokan/Arman Chopper Cookbook.

Here is that Cookbook article about that job.

 

[choptop37]

isnt there a difference in cylinder height?

 

[Stinky Pete]

Here is that Cookbook article about that job.

Thanks for posting.

One of these days I will put knuckle topend on a cone shovel. I think it's a beautiful combo and honey badger don't give a shit about knuckle purists...

 

[Scavenger]

Get the "what fits What" book,,has all the details

 

[otis]

For the visual learners, here's a link that summarizes returning knucklehead's back to stock.

http://www.oldbikesinsd.blogspot.com/2009/09/fixing-knucklehead-head-repairs.html

isnt there a difference in cylinder height?

There is a difference in cylinder height. Shim plates need to be used with pan jugs on knuckle motors.

 

[TheAppleKnocker]

I have a old roth chopper mag that has a write up on how to do it. I'll scan it later tonight

 

[taxman]

Here is that Cookbook article about that job.

Where's this from?

^^^^+2 on getting "What Fits What" by KH.

 

[JPP]

Where's this from?

^^^^+2 on getting "What Fits What" by KH.

It is from "The Custom Chopper Cookbook".

It's a pretty good book.

 

[panhead48mc]

The pan cyl hang over the cases lookin ugly! mine was done this way had to repair my heads. Hole drilled in knuck heads to run pan cyl actually touch the stock head bolt bore, in knuck head. repair is a royal pain in the ass. I simply purchased correct re-pop knuck cyl's. They only did this in 60-70's because parts were not avail. Why the heck anybody would wanna do it today is crazy. best Russ