Permanently removing oil cooler from 1990 R100GS

[guzziman56]

I've bought the bits from MotoBins so that next time I change the oil in my 1990 R100GS I can blank off the oil cooler hoses and permanently remove the oil cooler. I'm assuming the only reason this model has an oil cooler is because of the possibility of it being used for slow off-road riding.
I would be grateful for others opinion on this, especially from those who have done this modification, as of course I don't want to 'cook' the oil/engine.
I've thought of a combined dipstick/thermometer to monitor the oil temperature but they don't appear, from what I've read, to be that accurate.
Thanks for youp help

 

[Kenny]

Your call on this. The earlier R100GS with the traditional indicators etc didnn't have any oil cooler..and IMHO it wouldn't worry me to remove the oil cooler from mine either !!
Have you a listing of the part numbers from the invoice etc?

 

[richie]

I've bought the bits from MotoBins so that next time I change the oil in my 1990 R100GS I can blank off the oil cooler hoses and permanently remove the oil cooler. I'm assuming the only reason this model has an oil cooler is because of the possibility of it being used for slow off-road riding.
I would be grateful for others opinion on this, especially from those who have done this modification, as of course I don't want to 'cook' the oil/engine.
I've thought of a combined dipstick/thermometer to monitor the oil temperature but they don't appear, from what I've read, to be that accurate.
Thanks for youp help

Why not just blank it off with foil in the winter and leave it for the summer, worked a treat on my 1100.... I know its different, just an idea...

 

[John Armstrong]

Back from Europe and the passes. Cruising two up with panniers etc at 70 mph gave an oil temp of 130 deg C on my 100 GS which is oil cooler less, but does have the sump extension. At the top of the Jaufen pass it got this hot. Never saw the temp go above the RR though

 

[Rob Farmer]

You should have a new end cap and a short stub for screwing into the crankcases. My 100GSPD didn't have the cooler fitted when I got it. I refitted it but cannot say there's a noticeable difference.

Playing with the work thermal imagining camera shows the cooler does actually do something.

 

[Voyager]

Back from Europe and the passes. Cruising two up with panniers etc at 70 mph gave an oil temp of 130 deg C on my 100 GS which is oil cooler less, but does have the sump extension. At the top of the Jaufen pass it got this hot. Never saw the temp go above the RR though

Its showing 160 deg C - that's the temp of boiling oil if I remember my science lessons correctly

I think I'll be keeping my oil cooler


Bob.

 

[John Armstrong]

Its showing 160 deg C - that's the temp of boiling oil if I remember my science lessons correctly

I don't have to worry about emulsified engine oil

 

[Voyager]

I don't have to worry about emulsified engine oil

That's for sure


Bob.

 

[Beemerboff]

You dont want the oil much above 120 c on a regular basis , no matter what is in the sump.

Remember one of oils main functions is to cool the highly stressed bits of your engine, and it cant do much of a job if it is 160c!

Also, the rate that oil oxidizes increases rapidly over 120 C, so oil life will be shorter.

Even with the cooler my R100 GS ran hot - 120 c ish on the dip stick gauge. I fitter the larger ---995 sump and this has cooled it by 10/15 c - as much as I want and at 3 quid on Ebay much cheaper than a sump extension.

Dip stick gauges are easy to check for accuracy - just dip in boiling water. This doesnt necessarily mean that what they read is a true reflection of the temperature of the oil that is circulating through the engine, but they are no different to most other gauges in this respect, and they do give notice of changing circumstances.

 

[Steptoe]

. I fitter the larger ---995 sump and this has cooled it by 10/15 c - as much as I want and at 3 quid on Ebay much cheaper than a sump extension.

.

Do you have to use the oil pump pick up spacer when you fit the larger sump ? - Just asking.

 

[Shep]

I have an oil cooler and an oil temp guage on my R100GS, the sender to the guage is in the sump plug and it has a standard sump.

General running is around 100-110 but as soon as i stop in traffic after a bit of spirited riding, it's well into the 150's but it does cool down quick as soon as I start moving again perhaps that short time is down to the oil coolers effect?

I might have a play to see how effective the cooler is, it certainly gets kin hot so can't be doing much harm?

Shep

 

[Voyager]

Back in 1968-72 I had a MKII Ariel Square Four ( ). They were renowned for running hot.

I fitted a Triumph-3 oil cooler and ran it on Castrol Grand Prix (straight 50 ).

The oil pressure used to sit at 52 psi on the road but that could drop to 5 psi in heavy traffic, at which point the oil tank was far too hot to touch. As soon as I got moving the oil pressure would climb back to 52 psi within a couple of miles of gentle riding (I wasn't going to screw it when it was that hot).

I used to change the oil every 1,000 miles (about once a fortnight in the summer).

Oil coolers certainly work well


Bob.