SOHC.co.uk Forums > CB750
Oil, oil pumps and primary chains
Graeme77:
Oil pump is out, check valve was stuck fully open.
I think the pressure valve was stuck too.
Not going to open it up, ive free'd up the stuck items so ill re-fit it as it is.
Need new O rings as the old ones are a bit flat.
Oil filter looked mank, but have 2 new spares. I even took the roll pin out of the oil filter bolt to make sure the little plunger was free. Dont know what it dos, but if it is supposed to move ive made sure it does :)
The 1 liter or so of oil left in the oil tank had drained out over the last 24 hours, luckily the catch can was still under the engine!
Tried to get the neutral switch out to check too, sometimes you put it in neutral but the light doesnt come on for a while. Figured the switch might be sticking.
Unfortunately the terminal screw is solid and rounded out and the 10mm bolt is stuck fast. Its soaking now, hopefuly ill have more luck tomorrow. Annoying that the frame is in the way, stops me getting any decent tool on it.
Speaking of O rings, anyone changed the one behind the counter shaft bearing holder, behind the gear change mech? Read on the other site that it helped the guy's problem of getting it into neutral when stationary.
The screws rounded out on him though, anyone else experienced this?
While im at it i might as well do all the crappy little jobs.
Graeme77:
I see most people like mineral oil rather than semi synthetic.
Are you finding mineral mitorbike oil, or just using normal car oil?
kaceyk2:
Thought you would find something amiss with the check valve, I am glad you found the problem quick and sorted it out. Two litres was much to much to find in the sump!!
you say you have the clymer manual, watch out, for the Torque on the oil filter housing bolt, If I am remembering correct the clymer gives it as something reall y really WRONG, like ridiculously high...
You do not want to strip that bolt..
Be carefull with it, the correct torque is 20 - 24 ftlbs.
hope this helps.
Bryanj:
Tesco 10 w 40 mineral Diesel oil at
SteveD CB500K0:
Don't use car oil. Just Google it if you want chapter and verse!
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