« previous next »
Pages: [1]   Go Down

Author Topic: what is this and why is it leaking oil? 78 cb550  (Read 3227 times)

0 Members and 1 Guest are viewing this topic.

Offline jason teamshralp

  • Enthusiast
  • **
  • Posts: 204
what is this and why is it leaking oil? 78 cb550
« on: July 16, 2008, 07:32:00 PM »
Rode my bike to work almost dumped it at the last light. Felt like a rear flat tire. Got to work there was oil all over the left side of the tire. It was also dripping for a drain hole on the bottom of the front sprocket cover. I got it home today and took the cover off (pain) all four phillips heads were stuck and then stripped out.

Time for a stainless allen set!

once I got in there, I found the leak was coming from what ever this thing is where the screw driver is pointing. Right out of the screw.



i loosened it and oil came out. tightened it and more oil came out. Is this the oil pump and why is it leaking so bad. The bike was bone dry from my 10 minute commute to work.

Logged

Offline dustyc

  • I don't know why anyone would call me an
  • Expert
  • ****
  • Posts: 1,141
  • 1977 CB750K
Re: what is this and why is it leaking oil? 78 cb550
« Reply #1 on: July 16, 2008, 07:38:05 PM »
Oil pressure switch.  Was it loose? 
« Last Edit: July 16, 2008, 07:40:16 PM by dustyc »
Logged
1977 CB750

Offline jason teamshralp

  • Enthusiast
  • **
  • Posts: 204
Re: what is this and why is it leaking oil? 78 cb550
« Reply #2 on: July 16, 2008, 07:42:21 PM »
no it took a little effort to get it loose. and then I tightened it down and it still leaks.
Logged

martino1972

  • Guest
Re: what is this and why is it leaking oil? 78 cb550
« Reply #3 on: July 16, 2008, 07:45:24 PM »
time for a new oil pressure switch..
Logged

Offline jason teamshralp

  • Enthusiast
  • **
  • Posts: 204
Re: what is this and why is it leaking oil? 78 cb550
« Reply #4 on: July 16, 2008, 07:53:42 PM »
anyone know where to get one online, or do I have to salvage one?
Logged

Offline bender01

  • Master
  • *****
  • Posts: 1,891
  • "Follow the leader.He's on a Honda"
Re: what is this and why is it leaking oil? 78 cb550
« Reply #5 on: July 16, 2008, 07:59:35 PM »
There is a  universal one here somewhere it goes on an acura? But one from Honda is @ $30 I just got one a few months ago.
Logged
75 550 K1
74 750 K4
1968 450 K1 Super Sport
74 750k 836 project
http://www.bikepics.com/members/bender01/
So, the strategy is to lie to people you are asking for help?

I think I'll be busy going for a ride.

Good luck!
Two Tired Quote !

Offline jason teamshralp

  • Enthusiast
  • **
  • Posts: 204
Re: what is this and why is it leaking oil? 78 cb550
« Reply #6 on: July 16, 2008, 10:30:32 PM »
ok, so i need an oil pressure switch. I think i'll order one from bikebandit.com or somewhere.

What could have caused this? Overfill of oil? Low oil? Wrong oil? or something else?
Logged

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,802
Re: what is this and why is it leaking oil? 78 cb550
« Reply #7 on: July 16, 2008, 10:48:44 PM »
Quote from: jason teamshralp on July 16, 2008, 10:30:32 PM
What could have caused this? Overfill of oil? Low oil? Wrong oil? or something else?
It's your fault.  You've been riding it haven't you.  Poor thing is over thirty years old and you're on its back all the time!   ;D

The switch has a set of contact inside, a spring, and membrane call a diaphragm.   The membrane flexes and ages and eventually cracks, letting the oil that it is monitoring, escape.

Gotta replace parts in machines from time to time.

Cheers,

Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 15,007
  • CB500 Number 1000036
Re: what is this and why is it leaking oil? 78 cb550
« Reply #8 on: July 16, 2008, 10:54:37 PM »
TT I just love your answers, I was going to it leaks cos it can!
Logged
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!
Pages: [1]   Go Up
« previous next »