Topic: Oil Cooler Thread

[scondon]

The oil pressure switch is located on the lower case of the engine, just below and to the right of the cam chain tensioner(cb750). It is BEFORE the pressure gauge so if you're reading 60lbs at the gauge then there is something going on with the switch.

[Andoo]

Would it come on if the oil pump screen is clogged and the bypass is used? I can only hope the switch is faulty but I’m scared to death here.
I'd hate to freeze this engine due to lack of lubrication.

[scondon]

Would it come on if the oil pump screen is clogged and the bypass is used? I can only hope the switch is faulty but I’m scared to death here.
I'd hate to freeze this engine due to lack of lubrication.

   I hear ya I just went through this a few months back and it was VERY unsettling riding with the oil light on.

    The pressure gauge is usually mounted at the "main galley plug" which is just above, and in front of your right foot. This is just inches past where the pressure switch is mounted. They are basically at the same point on the same line. One is working(gauge) and the other is not(switch). You've confirmed that oil is circulating up to your cooler and this could NOT happen if there were no pressure in the line.

    The oil light is always ON and it is the switches function to turn it OFF. If any of your switch wiring has disconnected then the switch wont turn the light OFF.

[750goes]

Andoo,

check your oil pressure swith, located just to the right under the cam chain tensioner - under the black round bit of rubber... pull up the rubber cap and make sure you have a good solid ground on the connecting wire - the old screw is possibly rusty and loose...if so wriggle it about a bit and if the oil light goes out - problem solved

check the wiring running back from the switch - it finds its way under the starter cover and out through a main harness connection from the alternator,... check your connections - I bet one has come loose...

[Raul CB750K1]

Any ideas?

Sue him for the psychological suffering... 

Now seriously, why didn't you asked him privately in first place?

Raul

[mcpuffett]

hi thats Terrys bike in the picture i recognize it from his web site, i have one of Terrys oil cooler adapters fitted and have no issues?

have you ridden the bike or just had it started on the stand ?

i was just wondering if it just needed chance to get the oil circulating ?

     mick.

[Andoo]

I didn’t ask terry because it is not a malfunction of his product but that it contributed to my problem. The hump that broke the camels back.
The only reason I stated that it was his product is because I know many people on this board have the same setup.

I have run the bike quite a bit. The light came on after I gave it a spin around the block. I rode it for about 2 minutes when the light came on.

I will check the switch, my fingers are crossed.

[scondon]

I have run the bike quite a bit. The light came on after I gave it a spin around the block. I rode it for about 2 minutes when the light came on.

   Ahhh, more will be revealed    I will assume that as soon as the light came on you looked down at your pressure gauge to confirm you still had pressure. If so, then proceed with checking the switch as it is faulty.  If you did not look at your pressure gauge when the light came on then you may have indeed experienced a loss of pressure and other things might need looking into(oil volume, oil pump, etc..)

[Raul CB750K1]

I think the oil light is useless, at least for me. I don't keep staring at the idiot lights, they are not bright enough to catch my peripheral vision and the helmet chin blocks the direct view to the instruments. I believe in case my oil light ever lights while the bike is running, by the moment I see it it will be too late....


Raul

[Bob Wessner]

I think the oil light is useless, at least for me. I don't keep staring at the idiot lights, they are not bright enough to catch my peripheral vision and the helmet chin blocks the direct view to the instruments. I believe in case my oil light ever lights while the bike is running, by the moment I see it it will be too late....


Raul

I always hated the idiot lights myself. What are the chances you will be looking at it, or even a gauge, at the exact moment the pressure plummets to zero when your on the road? Now if one of the more electrically inclined members (Raul?) could tell me how to wire something loud and audible into the pressure circuit, that would be handy. 

[SD750F]

Bob,

Pretty simple, especially if you have a signal buzzer that you are not using and think it is loud enough. Otherwise you can use a 12V piezo that you can get from a local electronics supply or order on-line. The oil pressure switch is a basic open = normal operation. So it is only closed when the oil pressure drops I think below 5 psi. So take your signal buzzer or a 12V piezo and  attach the positive lead to your ignition 12V source which is a black (Bk) wire. Attach the ground lead of the signal/piezo to the blue/red (B/R) that runs to your oil pressure switch. When you turn your ignition, the alarm will sound and remain on until your pressure switch is at or above 5 psi. presto a sound alarm system. Here's something else to consider, maybe you want to install another switch on the alarm so if you should have a pressure switch failure, you can turn off a annoying alarm... 

Scott

[Bob Wessner]

Scott,

Thanks, I will save this.

[bryanj]

Descriptions not quite right
If the wire to the oil switch is GROUNDED anywhere the light will come on
If the pump screen was clogged you would get NO oil pressure as the pump could not suck anything (only bypass is on filter)
If the gauge reads pressure and there is oil pumping the switch, or wiring is suspect

[SD750F]

Well that is exactly what I said, I just said it like an electrical engineer would...

No oil pressure, the switch is closed or the signal wire is grounded to the engine case which is grounded. This would allow current to flow from the ignition switched power (black wire) through the oil indicator lamp, through the wire harness to the oil pressure sensor. When the engine is running, and the oil pressure is above or greater than the sensor's small expanded spring rating, the oil pressure pushes and opens the contacts in the sensor and the lamp no longer has current flow and is off. And yes, if the sense wire for the oil pressure switch is touching or shorted to any ground, then the oil pressure indicator light would be on...

Scott

[Andoo]

Descriptions not quite right
If the wire to the oil switch is GROUNDED anywhere the light will come on
If the pump screen was clogged you would get NO oil pressure as the pump could not suck anything (only bypass is on filter)
If the gauge reads pressure and there is oil pumping the switch, or wiring is suspect

According to the Honda manual the oil pump has a bypass that engages when oil is obstructed through its normal rout.

My problem is fixed by the way... I checked the wiring and I now again have working oil light.
Thank you to everyone.

[mcpuffett]

glad it worked out ok , mick.

[Raul CB750K1]

Bob,

Pretty simple, especially if you have a signal buzzer that you are not using and think it is loud enough. Otherwise you can use a 12V piezo that you can get from a local electronics supply or order on-line. The oil pressure switch is a basic open = normal operation. So it is only closed when the oil pressure drops I think below 5 psi. So take your signal buzzer or a 12V piezo and  attach the positive lead to your ignition 12V source which is a black (Bk) wire. Attach the ground lead of the signal/piezo to the blue/red (B/R) that runs to your oil pressure switch. When you turn your ignition, the alarm will sound and remain on until your pressure switch is at or above 5 psi. presto a sound alarm system. Here's something else to consider, maybe you want to install another switch on the alarm so if you should have a pressure switch failure, you can turn off a annoying alarm... 

Scott

I wouldn't do it that complicated. Just get yourself a tiny 12V piezo and connect it in parallel with the idiot light. The light go on - the piezo sounds. That's it. The only thing to keep me from doing it is that I would be listening to it every time I connect the ignition. You can complicate the circuit with a detector that the engine is running that would let the piezo sound when oil pressure is down AND engine is running. If we start like this we complicate these bikes very much; I rather leave it as it is.


Raul

[Bob Wessner]

The only thing to keep me from doing it is that I would be listening to it every time I connect the ignition.

Might not be too bad. I'm trying to think about my habits and the period of time the ignition is on while the engine is not running is quite brief and you get to verify it's working. In addition, it might be good encentive to keep the bike in tip-top tune so it starts immediately. 

[SD750F]

Raul CB750K1,

Perfect simple solution, wire the piezo across the oil pressure indicator lamp! I would still wire in a switch to be able to "shut it off".

I have a tendacy to over think a problem the first time around... Engineer thing. 

Scott

[Raul CB750K1]

Raul CB750K1,

Perfect simple solution, wire the piezo across the oil pressure indicator lamp! I would still wire in a switch to be able to "shut it off".

I have a tendacy to over think a problem the first time around... Engineer thing. 

Scott

Well, I'm an engineer myself, but I guess I make true that old proverb that says "if you want to know if there is an easier way to do something, give the task to a lazy person". And I get a lot of tasks all the time.... 

My father used to get angry with me because he always said I was always trying not to work. I always said I just try to get the job well done with the minimum effort, there is nothing wrong with it. We spent a weekend diggind in our basemet to build a cellar. The second day I was just dead and told him we were going nowhere. He get angry with me and told me something like "now you engineer, tell me an easier way to do this". I pointed him to the wall that separated us to the garage: "let's tear that wall down as there is no plumbing or cabling across, and let's get one of those small caterpillars to do the digging inside. Tearing down the wall and building it up again -even when it was made of bricks- will be much less work than digging this". Of course he didn't follow my advice, he was such a proud person. We continued digging that weekend, and when he saw we had just dug about 2 feet, next weekend he tore down the wall....



Raul

[Jinxracing]

The only thing to keep me from doing it is that I would be listening to it every time I connect the ignition.

Funny thing is, I'll bet that if Honda had included an oil pressure warning buzzer from the factory, we'd be reading posts about how to disconnect the annoying &%$#*! 

[seaweb11]

"Why does my buzzer come on every time I turn left and use the back brake"
History, oh yeah, I have had the tank off and I was mucking around in the headlight bucket last night

[LoopsAndLogic]

I was hoping if someone could tell me if this oil cooler could work on my CB400f?

It's in excellent condition, and it fits perfect! I bought if from Cycle Recyclers on Ebay.

They said it came off of a 1983 Honda Nighthawk 650.

Any reasons why it won't work or work properly?

Also, let me know if you need any further pic's.

Your help is appreciated

[riktaboy]

I would say if the filter adapter fits with no leaks etc, then I don't see why there would be any problem..

[mb3000gt]

do you have the adapter bolt?