Cylinder Head Removal / Install

DogT said:

Build the ludwig pressure tester jig?

Dave
69S

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Hi Dave,

This contraption oil-pressure-relief-valve-t7421.html

or I could go by the Mick Hemmings school of thought, slight rattle from spring after you shim it!

Tappet adjusters all standard, I'll double check the tappet settings just to be sure.

I took the dome nut off the OPRV, no shims. I went through all the posts on this site & others I could find about the OPRV. I know the only real way of knowing what oil pressure you have at certain revs is to use a pressure gauge ( I know RGM have one that plumbs into the head bango feed)

I decided to add two .9mm shims & run the bike on the bench. My theory about this is that if the OPRV is dumping oil into the timing chest from startup due to lack of resistance then this could cause wetsumping? Not too sure if I have this correct, feel free to correct me on this one! My understanding of adding the shims is that it increases the point at which the OPRV kicks in, it has nothing to do with increasing/decreasing oil pressure.

I'm going to plumb back in the XS650 read valve into the timing case breather.

I just ran the Norton & everything seems OK, previously I had a slight weep from the two top front recessed cylinder head nuts. After I ran the bike for 3-4 mins blipping up to 2K, I noticed I now have a leak from one/both of these nuts. I backed them off a little & re-torqued, I'll test later & see if this has improved the situation!

Checked the plug on the RHS and although it still had signs of previous oil contamination the plug was dry with no oily layer. I need to take the Norton for a spin later just to see if it's the same or worse!!!

Just trying all the simple stuff first!!

john robert bould said:

That exhaust tappet looks a a fair way out, is it stock?

click said:

Small update:

Removed the spindle plates on the RHS just to make sure the oiling holes are orientated correctly and unfortunately they are!

I used the wire method to locate the holes, the rear spindle hole is facing the carbs and the front spindle hole is facing the exhaust.

Next is to start the bike and observe the oil levels in the RHS rocker boxes

Pic attached as I know you guys like photo's :mrgreen: (you can see my 'precision' tool for locating the spindle holes!!!)

I also found this on the Norton Owners Site about smoke from the RHS:

1) The pressure release valve spring is dying and allowing too much oil to flood the timing cover. From here it is passing straight into the right hand bore where your new rings, (which still need to bed in to do a proper job), are letting lots of this black gold up to the head. Once the oil warms up a bit, then the pressure in the system is dropping enough for the release valve to cope and stop the excess heading straight for the sump. The cure is a new spring and/or some shims to up the pressure release point.

Any comments??

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