2pg Head Bolt Washers

[Barnsworth]

Hello everyone.

So I've got my 2pg piston installed into my new cylinder and now the head. Well when I took it off there was one and only one of these thick beveled washers (pic's) on all of the six head bolts. Question is, is this washer necessary or can I just use a flat washer with a lock washer and be okay. Obviously someone has had this torn apart before I got into it.

The help is always appreciated!

[cart around]

Some bolts have a 90 degree corner where the head meets the shank. Other bolts have more of a radiused corner to relieve stress. The bevel on the washer allows the radiused head to set down in for 100% contact of the mating surface.

We use them all the time on jet engines. Only you can decide how important that is to you. Maybe get some flat washers, and see how well your bolt head fits. A slightly larger hole would help a lot.


EDIT: Before you put it all together, double check that the hole in the side of your piston is facing the intake.

[Barnsworth]

Okay I see what you mean on the "tall" head bolts. The other two short ones seem to be at a 90. If someone wouldn't had cobbled this all up is know how to put it together! I hate to ask but then the only washers on the tall bolts are the beveled ones with no lock washers and the short ones are just a flat washer and a lock washer?

Also the port on the side of the piston I put in facing the carburetor side, that's correct right?

Thank you!

[cart around]

Look at page H-10 of the manual. I'm seeing washers under the cylinder bolts, and nothing under the head bolts.

Yes, you are right. Port side of piston towards the carburetor.


Let me run outside to see if I can spot my washers.

EDIT: I have washers on the engine mount bolts that screw into those studs. It's impossible to see under the shroud.

ANOTHER EDIT: Page H-10 says there are lock washers on the cylinder bolts. It does not mention any other washers.
Page H-18 has the torque specs for all of those bolts.

Another Reminder: Rings go bevel side up with ends around the alignment pins in the piston.

[Barnsworth]

Okay great. I have lock washers on the cylinder bolts so I'm good there.

I did have the rings on upside down, they wouldn't compress so I flipped them and them squeezed in fine on the piston. I guess I'm good to go, thank you very much again!