Pushrods confused

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Chili

Chili

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Dec 2, 2011
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Here comes Dumbo, Hi,
Is it possible to get the pushrods confused, during the reinstalling, on a Mk111?
It's a redo tomorrow, Damn thing.
Peter
 
Hi
For some reason the rt hand exhaust doesn't sit correctly, so as the tappet is about 1/8 to 3/16 high and the top is sitting in the cup? All instructions say the bottom of the rod naturally fits directly in to the cam follower. Tomorrow strip it again!!
Peter
 
Chili said:
All instructions say the bottom of the rod naturally fits directly in to the cam follower.
Click to expand...

Not always. It can rest on the edge of the follower.
 
You can use a stout screwdriver as a lever to move the rocker against the valve in order to give you clearance for relocating the top cup in the ball, use a thin screwdriver for manouvering the push rod into place. MAKE SURE the piston is NOT at TDC and/or that the other valve on the same cylinder is NOT open when you do this.
 
I loosened the adjuster on the rocker all the way, rotated the motor until the offending valve was fully closed, then used a long forceps to grab the push rod, you can gently lift it to insure it is correctly set on the bottom and then hold the rocker closed and screw the adjuster down.

Take the inlet and exhaust rocker cover off and use a flashlight to see what you are doing

Just finished it last night.

Denis
 
It is a real pain to set the head down AND get all of the pushrods in place at once, but I find it's the easiest way especially if you have a little shim to place between the head and the cylinder then rotate the crank till all the pushrods have the same slack, roughly.
 
L.A.B. said:
Chili said:
All instructions say the bottom of the rod naturally fits directly in to the cam follower.
Click to expand...

Not always. It can rest on the edge of the follower.
Click to expand...

+1 LAB... Before you "strip" have a fluff around and try to seat it.. Yes two different lengthed push rods but u may have been arsey and just hooked up on a lifter edge..
 
Hello the Brainstust,
Thanks fall all the help, finally after several head liftings, I finally got everything in the right place.
Peter
 
Chili said:
Hello the Brainstust,
Thanks fall all the help, finally after several head liftings, I finally got everything in the right place.
Peter
Click to expand...


Derrr, not good enough, HOW, WHY, WOSUP,, you need to share more info here.. What was wrong so the rest of us dont have the same kokup!!
 
Hi
Finally not inadvertently touching the rocker and releasing the push rod, got it all back together and went for a test ride today, everything going great till 9 miles when I stopped for petrol, restarted white smoke from one side only! Went out and bought a compression tester, now should I do it hot or cold, and what would the approx pressure be for a standard engine?
Peter
 
Should do it both cold and hot and then with a bit of oil to get sense of ring sealing condition. 110 PSI is ballpark for 9-ish CR and standard cam at WOT kicking a few cycles.
 
Chilli
Don't know what the head was off for but if a stem seal has come off it can belch smoke like buggery.
J
 
hobot said:
Should do it both cold and hot and then with a bit of oil to get sense of ring sealing condition. 110 PSI is ballpark for 9-ish CR and standard cam at WOT kicking a few cycles.
Click to expand...

Steve you posted in 2012 that a 9 ish comp ratio was 140-176 Remember it was the thread you showed those birds cleavages and mikegrey660 slagged of jsouthards compression tester. But that was back in the day(just heard a bike on the bypass and I don't think he was having any compression issues) when it was all good natured fun and I thought this forum was too technical as most newbie questions were answered by a link to a workshop manual cos a good read of the workshop manual tells you how to fit a cylinder head without getting the pushrods out of position. As for L.A.B s comments on rods seated in the followers maybe a read of the manuals he so avidly advocates for others would refresh his memory of how it should be done according to the manufacturers, doesn't say anything other than "ensure all push rods are located in the cupped portion in the tappets" and " use a short length of stout wire to manipulate the rods into position". Norton workshop manuals and parts books an Oasis of knowledge in the dessert of misinformation!
J
 
auldblue said:
As for L.A.B s comments on rods seated in the followers maybe a read of the manuals he so avidly advocates for others would refresh his memory of how it should be done according to the manufacturers, doesn't say anything other than "ensure all push rods are located in the cupped portion in the tappets" and " use a short length of stout wire to manipulate the rods into position". Norton workshop manuals and parts books an Oasis of knowledge in the dessert of misinformation!
Click to expand...

I haven't a clue what that's all about, as I merely pointed out that the pushrods do not always automatically drop into the cam followers-which as Chili rightly said IS what's stated in the factory manual for this particular Commando model.

So perhaps you need to read the manual, but the right manual, here's the link: http://britmoto.com/manuals/Manuals/850_man.pdf
Section C9.
 
Hello
The reason the head was off, was that the gasket had "blown", something so simple has caused so much Grief! Yesterday while on the ride before and after the smoke, there was No evident loss of power.
Thanks Peter
 
When I put push rods in I put a dap of grease on the push rod (follower end) and it seems to form a seal that you can feel when you lift the rod. The best way I can explain is its like it has a little suction and you can feel the resistance when you try to lift the rod. If it is not in the cup then there is no resistance. Any way it works for me along with cable ties to hold the rods while fitting the head.

Cheers
Peter R
 
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