Engine oil cooler

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baz said:
As stated
It's my bit of thread derailment
I can remember reading a workshop manual for an xs1100 and noting a difference in oil capacity
When I looked at the pictures in the manual the US ones had no oil cooler
I removed mine from my Yamaha out of interest and it made no difference at all
But I wasn't racing it
Click to expand...


You mean oil temp was the same with or without an oil cooler?
 
Ok, ok, ok!.
But, please, what is the line of the oil pipes between oil tank/oil filter/ oil cooler?.
ThNks.
Piero
 
Piero, if you wish to fit an oil cooler you basically have two options:
The fist option (obviously prefered by some forum members) is to fit the cooler in the line that leads to the cylinder head.
Te second option is to fit the cooler in the RETURN line that runs from the engine to the oil filter.
 
You need to rephrase what you what to know, literally the line is rubber hose but I doubt that answers you.
 
What I understand is that Piero want to know the route of the lines, if I understand correctly.
 
pierodn said:
Ok, ok, ok!.
But, please, what is the line of the oil pipes between oil tank/oil filter/ oil cooler?.
ThNks.
Piero
Click to expand...

Piero,

If I understand your question correctly, this may be the answer your looking for:

Neatest routing to me is from engine, perhaps with modified oil manifold, take the line forwards and up to a cooler mounted high up on the frame down tubes. Then the line from the outlet of the cooler runs down the other frame tube, under the engine and into the filter, the filter is then plumbed into the tank as standard.

As all of this is on the return line and does not effect oil pressure or flow.

If you want a thermostat then things become a little more complex as it’s not just an on / off valve, it has to bypass the cooler when cold and route through the cooler when up to temperature.

Hopefully, as was asked earlier, folk will post pictures of their installations.
 
Last edited:
pierodn said:
Ok, ok, ok!.
But, please, what is the line of the oil pipes between oil tank/oil filter/ oil cooler?.
ThNks.
Piero
Click to expand...

Put the cooler inline between the pump return and the oil tank. Make certain the cooler has a thermostat. If not, add a bypass thermostat. If you don’t have a thermostat and you don’t ride far or hard enough, the oil may never get hot enough to get rid of the moisture that condensed to the oil when the oil cools.
 
JimC said:
You mean oil temp was the same with or without an oil cooler?
Click to expand...
I never checked the oil temperature but I used to rev the hell out of the motor ,and I mean redlining it a lot of the time and it made no difference to the engine, but it's way different from redlining a commando
 
baz said:
I never checked the oil temperature but I used to rev the hell out of the motor ,and I mean redlining it a lot of the time and it made no difference to the engine, but it's way different from redlining a commando
Click to expand...


So, you have no real evidence, just conjecture. Much like engine condition, just conjecture.
 
Piero the oil comes out of the hot motor then straight up to the oil cooler then out of the oil cooler then to your filter and then back to your oil tank to repeat its cycle, from running around a hot engine the oil needs to cool down a bit before if cirulate through your hot motor again, without a oil cooler your oil will always be hot even before it goes back into your hot motor.
I have heard all the aguements about oil coolers in the 45 years of riding bikes and 43 years of running Lochart oil coolers on my air cooled British twins, I think I have enough experience to know what I am talking about and some of the things people say who have never ran a oil cooler in their whole life but they all have their own say about it, things like oil takes longer to get up to running temp, well I have never notice that and they need a thermosta to me its not needed, the cooler my Norton runs the better it runs and the cooler the night air gets the better it runs.
I don't care what others say about running a oil cooler, my opinions are all mine and people set them up differently or have their own ideas but one thing is I know what my bikes like and they run better with a oil cooler, the old oil keeps it strenght till its due to be changed as well my Norton only runs the very min of wiring, running JH maggie and no battery and adding a themosta would just be another headache to worry about as well running a by pass oil lines etc etc and my experience there is no need for it.
For most of my Norton life it was a everyday rider and for about 15 years it was my only transport, so the longer I get out of my motor the better and your motor will show more sign of wear and tear when they are running hot.
As I say this is my opinions and my experience with running a oil cooler, if you decide its not needed then all good, everyone will have their own opinions the same as what oil to use or what exhaust to run to what tyres are best to whats the best ignition systems to run, everyone has their own opinion on these, what works for some might not be the case with others, each bike is different and not all run the same and if you have never ran a oil cooler then you really will never know.

Ashley
 
My bike does seem to like the cool air of the fall and early spring the best , for sure ...
Craig
 
When you run a near-standard Commando with iron barrels on methanol, it warms up and runs very well, very quickly. That says to me that it would run very hot on petrol, if it was ridden hard. So I would use an oil cooler.
 
ashman said:
Piero the oil comes out of the hot motor then straight up to the oil cooler then out of the oil cooler then to your filter and then back to your oil tank to repeat its cycle, from running around a hot engine the oil needs to cool down a bit before if cirulate through your hot motor again, without a oil cooler your oil will always be hot even before it goes back into your hot motor.
I have heard all the aguements about oil coolers in the 45 years of riding bikes and 43 years of running Lochart oil coolers on my air cooled British twins, I think I have enough experience to know what I am talking about and some of the things people say who have never ran a oil cooler in their whole life but they all have their own say about it, things like oil takes longer to get up to running temp, well I have never notice that and they need a thermosta to me its not needed, the cooler my Norton runs the better it runs and the cooler the night air gets the better it runs.
I don't care what others say about running a oil cooler, my opinions are all mine and people set them up differently or have their own ideas but one thing is I know what my bikes like and they run better with a oil cooler, the old oil keeps it strenght till its due to be changed as well my Norton only runs the very min of wiring, running JH maggie and no battery and adding a themosta would just be another headache to worry about as well running a by pass oil lines etc etc and my experience there is no need for it.
For most of my Norton life it was a everyday rider and for about 15 years it was my only transport, so the longer I get out of my motor the better and your motor will show more sign of wear and tear when they are running hot.
As I say this is my opinions and my experience with running a oil cooler, if you decide its not needed then all good, everyone will have their own opinions the same as what oil to use or what exhaust to run to what tyres are best to whats the best ignition systems to run, everyone has their own opinion on these, what works for some might not be the case with others, each bike is different and not all run the same and if you have never ran a oil cooler then you really will never know.

Ashley
Click to expand...

Cold air means leaner mixture. If your bike is jetted slightly too rich, it will perform better in cold weather or when you ride it through a forest where there is more oxygen. If it is jetted correctly for normal circumstances, it will cough and spit when the weather is cold - at least until the inlet tract warms up.
About ignition timing - three things need to be balanced - ignition timing, compression ratio, and jetting. A change in one must be compensated for in the others. Fixed timing is OK, but it is not always optimal. As the revs increase the internal geometry of the crank and rods affect the time for start of the fixed time combustion event - must be advanced, if the same power is to be obtained from each firing. It has been claimed that the formula the best advance curve cannot be calculated. I don't believe that. In any motor, it is a function of rod length and stroke to get the firing to occur at the same distance before TDC as the revs rise.
 
Peter R said:
Piero, if you wish to fit an oil cooler you basically have two options:
The fist option (obviously prefered by some forum members) is to fit the cooler in the line that leads to the cylinder head.
Te second option is to fit the cooler in the RETURN line that runs from the engine to the oil filter.
Click to expand...

Hi.
Please, could you explain better the first option?
Thanks
Piero
 
pierodn said:
Hi.
Please, could you explain better the first option?
Thanks
Piero
Click to expand...

This is the simplest option Piero, it will not cool your oil as much, the idea is to send cooled oil to the cylinder head in order to lower the cylinder head temperature a little. This is the hottest part of the engine and is the source of all engine heat, so cooling it has to be a good thing. At least that’s the idea.

To do this, mount a cooler high up on the frame down tubes (below the front of the tank). Extend your rocker oil feed line from the crank case directly into the oil cooler. Connect the outlet of the cooler to your T piece in the rocker feed line.

Now your oil will go through the cooler on the way to the cylinder head. Ensuring your head gets cooled oil.

Because the oil feed to the head is limited to only a little of the engines oil, the oil will travel through the cooler slowly, this will allow a greater heat transfer and cool the oil that goes through the cooler more than if the entire oil supply was going through it.

Cooler oil entering the head will create a greater heat differential and therefore take more heat from the head.

Well, at least that’s the theory!

This is what I intend to do on my own 920 motor.
 
Cannnot help with the oil cooler, but the Tru-Cool (e.g. https://www.amazon.com/Tru-Cool-Long-Transmission-External-708-4739P6/dp/B008BTJFJ4) is recommended by Richard Beard over on the Triples online forum. Richard was one of the people involved in the design of the oil cooling system on the Triumph / BSA triples.
I have them fitted to my triples, but have yet to get them on the road I'm afraid.

Somewhere such as DeamonTweeks in the UK (https://www.demon-tweeks.com/dk/mocal-oil-coolers-245479/) offer a range of coolers.
 
Hi All,
There is a original "new old stock" never been used oil cooler from Norman Hyde on eBay with only 3 hours to go. Currently £50 located in Enfield North London. Be quick!
Ebay item title is "CLASSIC NORMAN HYDE ENGINE OIL COOLER TRIUMPH BONNEVILLE T140 & NORTON COMMANDO"
 
SteveBorland said:
Cannnot help with the oil cooler, but the Tru-Cool (e.g. https://www.amazon.com/Tru-Cool-Long-Transmission-External-708-4739P6/dp/B008BTJFJ4) is recommended by Richard Beard over on the Triples online forum. Richard was one of the people involved in the design of the oil cooling system on the Triumph / BSA triples.
I have them fitted to my triples, but have yet to get them on the road I'm afraid.

Somewhere such as DeamonTweeks in the UK (https://www.demon-tweeks.com/dk/mocal-oil-coolers-245479/) offer a range of coolers.
Click to expand...

That’s a very simple, neat looking thermostat. Tempting...
 
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