52 manifold nuts and seals

[sean]

im looking for some manifold nuts and seals for my 52 project and noticed the colony kits start at 53 and newer...are the 52 the same or was there a change in 53 to the nut size?i was told they are the same as late knucks and panheads...does anyone have a colony pn for a 52 k?

[EKHKHK56]

Hi Sean, K Inlet Pipes are all the same OD on the pipe. As a matter of fact the manifold, the modern term, is a -40 part number as is the insulator, nuts, and seals all -40. Only the insulator gaskets are -52 part number, and the same throughout the run, 52-56...I don`t know if they fit the BigTwin Flatheads or which model with the -40 number. The Cad Nuts & Brass Seal kit from Colony is an excellent choice. Most original nuts have those pesky chisel marks in them!

[sean]

thank you for the info...did not want to wait 2 weeks for the wrong size to arrive !

[1955KH]

If would consider space age technology, instead of the problematical plumber style brass seals, you may like to order a pair of "PEEK" seals from Enfield Racing.
Their part #H-D 3 is identical to 27059-40 which suits all 1952-56 K/KH.
Have a look at http://www.enfieldracing.com/peek_seals_8.html

[sean]

i ordered the coloney set but if i have troubles ill think about these...thanks for the tip.

[John R]

Do inspect the manifold itself. Quite often the diameters have been pulled-in by over tightening of the big nuts leaving it difficult to seal. I don't know the Peek seals but I always cheat with the stock ones by smearing a little non setting gasket cement (such as Blue Hylomar) on the manifold before pressing the brass rings on to fill any gap under the ring. If I turn the throttle stop out the motor quits so I can't have much of an air leak if at all.