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CB350/400 / CB400F Oil pressure switch slow leak
« on: April 11, 2024, 06:56:30 AM »
Hello ladies and gents!
A year ago I had a slow oil leak at the oil pressure switch thread.
When running at temp I would lose a drop or two every five to ten minutes.
A degreased the oil pump housing, switch and the threads before putting
yellow loctite (577) on said threads.
It worked for 300km and started leaking again.
So I got a new switch. Turns out the OG one has replacements currently manufactured
and fitted on modern japanese cars. So yeah no need to spend 60€ for a used one on
Ebay as I previously thought.
Fitted said new switch without loctite (Wasnt mentioned in the holy book)
Then I tightened it as much as I could, that is until I got scared to strip something.
The bible does give a torque setting but impossible to fit a torque wrench in there.
3 months have passed with small rides, I washed it thoroughly for the first spring ride.
Still leaking a drop or two.
Have you fine people run into similar issues?
I would like to read your thoughts and opinions on the matter, maybe make this topic a compendium of OPS issues and fixes, who knows!
Cheers from across the channel!
A year ago I had a slow oil leak at the oil pressure switch thread.
When running at temp I would lose a drop or two every five to ten minutes.
A degreased the oil pump housing, switch and the threads before putting
yellow loctite (577) on said threads.
It worked for 300km and started leaking again.
So I got a new switch. Turns out the OG one has replacements currently manufactured
and fitted on modern japanese cars. So yeah no need to spend 60€ for a used one on
Ebay as I previously thought.
Fitted said new switch without loctite (Wasnt mentioned in the holy book)
Then I tightened it as much as I could, that is until I got scared to strip something.
The bible does give a torque setting but impossible to fit a torque wrench in there.
3 months have passed with small rides, I washed it thoroughly for the first spring ride.
Still leaking a drop or two.
Have you fine people run into similar issues?
I would like to read your thoughts and opinions on the matter, maybe make this topic a compendium of OPS issues and fixes, who knows!
Cheers from across the channel!
