SOHC.co.uk Forums > CB350/400
New heart for the old girl
K2-K6:
A nice project with time to complete it in parallel while the original is being used.
The bearings do indeed look quite good.
Failed oil film(old or diluted with fuel) would ordinarily cause the camshaft to wear the aluminium bearing surfaces and perhaps bring pickup and degradation of the rocker faces.
Unfiltered oil with abrasive particles ( metallic or grit based) would be embedded into the soft aluminium and cut the steel camshaft bearings.
Neither look to be the case, suggesting it's been serviced at least competently in its life regarding oil changing etc. Quite a good start.
McCabe-Thiele (Ted):
Looks very good considering its been stood for a long time a testimony to dry storage I guess.
allankelly1:
Ok
That’s the first stage done.
Engine now sat in a custom engine cradle
Now to drain her out and then a carefully strip down with tons of photo as a reference point later when I have forgotten how something fits
Best wishes Al
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McCabe-Thiele (Ted):
Hi Al,
The oil is proper mineral oil so might be handy to put back in later - the small amount of ATF oil I put down the bores will not cause any issues as its amazingly versatile stuff. Back in the late 1990's as a cure for Astra layshaft noises the Vauxhall fix was to drop the Hypoid 80 & use ATF Dexron 2. That is Dexron 3 fully synthetic I used.
allankelly1:
Hi all
Cracking on with the strip now
Generator rotor off, clutch basket off with my home made puller and clutch nut peg spanner, and barrels now lifted too
Cam chain tensioner has done its normal siezed up solid and snapped off and found out on stripping down the engine the clutch side has a damaged lug
But once the cases are bare these jobs will be easy to do as I will do the normal tensioner upgrade and fit the upgraded stainless steel tensioner assembly and get the broken lug built up by my local TIG welder expert and retapped
Catch up with you all soon
Best wishes Al
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