Replacing B33/M33 timing cover.

[John FD]

I've spent a bit of time this weekend looking at the oily bits of my 1954 plunger-framed M33 to see if I could reduce its sieve like qualities.

I had thought the timing cover gasket might not be oil tight so ordered a replacement and removed the cover. On cleaning it up I noticed these cracks on the inside.


I inspected the outside and found a corresponding dent and a small crack above it.


I filled the timing cover with WD40 and within a couple of minutes it had found its way through to the outside.

When I went back through my pre-dismantling photos I found this one showing a drip starting from a point in the timing cover. I hadn't noticed it before but it's also close to the area of cracks found on the inside.


I could try welding up the affected area but will probably get a replacement cover.

So, finally getting round to my question; I can see there are a couple of oil seals in the cover for the ends of the cams. Should there also be some sort of seal around the spigot mounted to the cover which goes into the crank nut? Do you have any other words of wisdom?

[idie]

There is no seal on the spigot.  This is the oil feed quill for the big ends and bearings. It just goes into the crank shaft.

[DAVE BRADY]

Welding may cause some heat distortion but there is a product like Lumiweld called HTS-2000.  It works at a much lower temp. than welding and it is said to be the lates tech. in aluminium repair.  I have used it a couple of times on small jobs and it does work.
www.frost.co.uk is where I got mine.

Dave.

[TTJOHN]

I'm with you on this one Dave, HT2000 is a great product I have used it several times, as  long as you can get enough heat on the specific item and clean up the area you need to repair.

TTJohn

[John FD]

Thanks everyone. I've had some success repairing other parts with lumiweld as well and that was going to be my first choice if I could get the casing clean enough. However, this morning a friend said "I've got one of those somewhere" and sure enough it's just the thing! I've ordered the rubber seals so should be good to go.

The main thing is that I'm reassured there shouldn't be a seal on that spigot thing. I'm new to this bike having spent the last however many years fettling Moto Guzzis.

Thanks again everyone.