Oil Leaking From Timing Cover

L.A.B. said:
Check for any sharp edges around the seal recess in the timing cover?

That red camshaft seal could be the original.
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+1 on the seal recess.

I find that to be the hardest seal in a Norton to install without problem. I carefully smooth the lip of the cover recess before even trying and then I heat the timing cover - not enough to damage the seal but enough to let it in a little easier. It's real important to have it go in straight and with even pressure at all points - most seals don't get pushed in from the open side as that one does.
 
Bonzo said:
Oil Leaking From Timing Cover
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I don't see where any one has mentioned it - it appears like your timing chain is too loose. You'll need to read up on how to set it properly.
 
If ypu plan to release/re-torque the cam chain sprocket nut, to replace the chain or even to set chain tension correctly, you really should have the intermediate shaft holding bracket tool from AN. Or an old timing chest cover with sections cut out to access the chain and sprocket nut etc.
Otherwise it is easy to damage the casing from bending moment on intermediate sprocket while torquing nut. Setting tension then gets problematic as un-square shaft gives misleading chain tension.
 
Thanks, as always, for your comments & advice gents.

I'm just reading through this whilst scoffing my porridge before I dive in.

I'll check for any sharp edges/burrs on the seal recess and take care installing the seal.

I'll give the timing cover a rub in oil with some smooth wet & dry, but what tips for the inner case mating surfaces (without removal)?

As for the cam chain, my initial reaction yesterday was that it was slack. I'll get a measurement - and get a few more spares ordered.

Ooh and on Monday I'll nip in to see our HR dept at work and arrange for my monthly wages to be sent directly to AN :cool:

A small job that initially appears relatively simple & straight forward that then turns into a more complicated, time consuming and expensive project. What a shock! :D
 
Bonzo said:
I'll give the timing cover a rub in oil with some smooth wet & dry, but what tips for the inner case mating surfaces (without removal)?
Click to expand...

Just clean the joint surfaces and fit a new gasket, either greased or with sealant (Wellseal, or whatever you have etc.) if you like.

Bonzo said:
As for the cam chain, my initial reaction yesterday was that it was slack. I'll get a measurement - and get a few more spares ordered.
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Yes, it looks to be in need of some adjustment.
 
Bonzo said:
A small job that initially appears relatively simple & straight forward that then turns into a more complicated, time consuming and expensive project. What a shock! :D
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You need to re-calibrate… nothing mentioned thus far in this thread is remotely complicated, time consuming or expensive… not in Norton speak at least !
 
Bonzo said:
Thanks, as always, for your comments & advice gents.

I'm just reading through this whilst scoffing my porridge before I dive in.

I'll check for any sharp edges/burrs on the seal recess and take care installing the seal.

I'll give the timing cover a rub in oil with some smooth wet & dry, but what tips for the inner case mating surfaces (without removal)?

As for the cam chain, my initial reaction yesterday was that it was slack. I'll get a measurement - and get a few more spares ordered.

Ooh and on Monday I'll nip in to see our HR dept at work and arrange for my monthly wages to be sent directly to AN :cool:

A small job that initially appears relatively simple & straight forward that then turns into a more complicated, time consuming and expensive project. What a shock! :D
Click to expand...
Go easy with the wet n dry
You are going to have to carefully scrape the gasket material off the inner case
There is no need for gasket cement here at all
I don't know why people do it ! All that is needed is grease on a new gasket and flat surfaces
When you check and adjust the cam chain make sure the idle pinion pivot pin isn't loose in the carankase otherwise it'll give a false reading and when you refit the timing cover it'll put the cam chain under strain
 
baz said:
Go easy with the wet n dry
You are going to have to carefully scrape the gasket material off the inner case
There is no need for gasket cement here at all
I don't know why people do it ! All that is needed is grease on a new gasket and flat surfaces
When you check and adjust the cam chain make sure the idle pinion pivot pin isn't loose in the carankase otherwise it'll give a false reading and when you refit the timing cover it'll put the cam chain under strain
Click to expand...



Why?
When used in ADDITION to the gasket, because it seals positively. And augments the limitations of ancient paper gaskets. And, my personal favorite side benefit, the gasket will peel off like Post-It note.
If you've scraped a hundred fossilized base gaskets from between cylinder studs on a two stroke, you'd have a clearer view.

Oil Leaking From Timing Cover
 
concours said:
Why?
When used in ADDITION to the gasket, because it seals positively. And augments the limitations of ancient paper gaskets. And, my personal favorite side benefit, the gasket will peel off like Post-It note.
If you've scraped a hundred fossilized base gaskets from between cylinder studs on a two stroke, you'd have a clearer view.

View attachment 96286
Click to expand...
Personal preference I guess
Never had one leak yet and the gasket peels right off
 
I'm gonna have to seek a little more advice again.

I've removed the circlip, but how is this crank shaft oil seal removed?

It appears to either have a close fitting washer over the top of it (though I'm sure that it hasn't), or else there is a lip in the timing case recess (though I'm sure there isn't). Or is that the seal?

Oil Leaking From Timing Cover


New seal

Oil Leaking From Timing Cover


I don't want to force something in there and knacker the recess :oops:
 
Bonzo said:
I'm gonna have to seek a little more advice again.

I've removed the circlip, but how is this crank shaft oil seal removed?

It appears to either have a close fitting washer over the top of it (though I'm sure that it hasn't), or else there is a lip in the timing case recess (though I'm sure there isn't). Or is that the seal?

Oil Leaking From Timing Cover


New seal

Oil Leaking From Timing Cover


I don't want to force something in there and knacker the recess :oops:
Click to expand...
All there should be is a seal like the one in your hand and a circlip
To get the old seal out you remove the circlip and gently ease the seal out with a wide screwdriver
At least that's how I do it
Being careful not to force or damage anything
Never seen one with a shim before though?
 
baz said:
Does a seal look like that if you peel the rubber off?
Click to expand...

Seals usually have a metal reinforcing ring.
Sometimes on the outside of the seal and sometimes moulded into it...
Oil Leaking From Timing Cover


"Figure 2: Shaft seal components: Outside covering which seals against the housing (A), metal ring providing stability (B), dust lip (C), the garter spring which clamps the V-shaped radial seal to the axis (D), and the V-shaped radial seal (E)"
 
So, gently levering it out is the way to go eh?

I'll report back.
 
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