Forum

[Haggis]

Inside looks like this, the oil pump outlet O ring seats against the small machined face on the filter housing.

[vince]

Hi, this seem to be an adaptation of the system used on 250 crusaders. Into outer cover then back into crankshaft. I think the crusader seals seem better. Vince

[PeteF]

Thanks Haggis, more pondering required

[Harald]

Here is a picture of the already modified engine cover. As the hole (from factory) is not in the center of the oil filter element it makes things more complicated. I made several approaches to find a good solution and ended up with the current one.

[Cranky]

Well I got all worried about this so today I took off the cover again. Its been off so many times of late I just have to whistle and it leaps of itself.
Yes the o ring was superglued to the pump output spigot but I think it was some epoxy .

The surface of the intake hole to the oil filter is flush with the casing surface. The oil pump outlet spigot is flush with the crank case. This means there is zero gap without a gasket. This is fine as I don't use gaskets -- firstly I cant get one and using a light smear of a rubber gasket is fine by me.

The old o ring was 1.9mm and the recess for the O ring was 1.2. I saw no reason to make any modifications. I made up a plastecine o ring and banged the case home. I was then able to see and measure what gaps I had from the squashed plastecine (play do if you are American)

Even if you consider the difference of manufactures of gaskets. it is all accountable.

Thing is about the mod such as this and a nut on the inside of the filter It will mean the next person to remove the casing will be cursing who ever puts a nut on the oil filer intake and will probably break the casing trying to remove it.

So I stuck it back in the oil pump housing output spigot with some thick grease (I love my thick grease)

However--whilst peering down the hole of the oil filter intake hole I saw a black thing. In my country this could be a baby Python but no surely not in my oil filter. No-- it was another o ring. I guess some one changed the filter and just threw an o ring down the hole and fitted in the filter. So it was'nt a wasted day,--and I changed the oil too SAE 40 .

[Rattlebattle]

Maybe they crack because they are glued on at the factory. Like you I just use grease. Think I’ll remove the gasket when I service it though... Who knew they were so precisely engineered.....

[Haggis]

All mine have had a gasket fitted on the right hand case from the factory but none on the clutch cases.
None of the oil pump seals have shown any sign of being glued in place but they were very compressed.
I think a better quality O ring is all tha ts required.

[Rattlebattle]

My original one wasn’t glued in either. There was no gasket on the primary drive cover, but IIRC there was one on the timing side. This was different to the replacements I have since fitted in that the original was a one-piece gasket designed specifically for the UCE whereas all the replacements needed a piece cutting off aft of the timing chest. Presumably the gasket fits other, earlier models, as is the case with cylinder head and base gaskets.
Anyway, I shall consider not using a t/s gasket and shall use the o ring supplied by Hitchcocks, with a little grease to retain it. I’m not sure how big an issue this o ring really is because in five years of this and other forum participation I don’t recall it before. Same applies to rocker lubrication. I’m talking about Western owners here; some of the Indian stuff defies belief.

[PeteF]

I’m not sure how big an issue this o ring really is because in five years of this and other forum participation I don’t recall it before.

I think you might be right and Harald has just been unlucky.