Author Topic: panda 30 head skimming (Read 13389 times)

126dave · « **Reply #30 on:** June 24, 2007, 04:20:21 PM »

well,i guess this one for the browsers..........getting close to putting engine back together,and have been today checking out the pushrod tube fit with the new skimmed head,2mm off remember........i reckon the standard fsm 650 126 oil seals at the top of the tube,and a RTV/silicon seal at the bottom will do the trick......the tubes fit tight down on the block,and the top seal gets compressed when i tighten the head down,i dont realy want to cut the tubes so im hoping this will be ok,i cant see why not,anyone else see a problem???..... :shock:

126dave · « **Reply #31 on:** June 27, 2007, 10:54:37 AM »

heres a tip,with 2mm off the head you need to shim the rocker gear up the same amount,under the pedestal,other wise the shouldered and flared oil feed pipe holds it off the head..... :cool:

bis13 · « **Reply #32 on:** June 27, 2007, 08:34:44 PM »

so your saying because you have lost it from the face of the head you must replace it on the rear in order to allow correct fitment? will that affect the working of the tappets as you have changed the angle they are in relation to the valve stem tops ? ie the area they normally sit on will be different? :

:

126dave · « **Reply #33 on:** June 27, 2007, 08:38:42 PM »

hi mick,mmnn,the spacers have put it all back as it was before,i was going to take up the 2mm on the tappet adjusters,but now all should be back as ''normal''........well for me anyway...... :shock:....the motor is going to get a nice run period anyways.....the face will run at a slight diff angle but all should be ok,anyhooooo,i cannot workout how to cut the pipe and reflare ACURATLY... :roll:

126dave · « **Reply #34 on:** June 27, 2007, 08:50:27 PM »

you know,there's lots of problems like this when modding a 126,the guys that sell cams/heads/exhausts etc just dont bother with the details eh?...its a bluddy mine field when going for panda head etc...... :roll:

hudsonhenry · « **Reply #35 on:** June 28, 2007, 09:25:08 AM »

Dave

Don't suppose you would like to write an article for my Retro500 site would you? Are you taking pics as well?

Nigel

126dave · « **Reply #36 on:** June 28, 2007, 11:10:09 AM »

hi,well,i reckon i could put a few words together,maybe a pic or two, :smt024 at the very least it would show how not to do things!!.cant promise when tho :smt028

126dave · « **Reply #37 on:** July 01, 2007, 07:53:59 PM »

in the end i used fsm 650 rubbers on the bottom of the tubes and skinny 500 ones at the top with rtv at both ends...i also trimmed the tubes both ends so they dont hit the cam followers,and,at the top allow the oil to return to the cam etc,the skinny 500 seals left the tubes too 'proud' in the head and would have starved the cam followers...so as of 6.30pm the head is torqued down and the valves seem to miss the pistons ok.....just the bottom end to finish and then dial in the cam......