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LArger oil cooler

  • Thread starter Thread starter makenzie71
  • Start date Start date
The second generation GS bikes had oil coolers, as do most road going air cooled bikes built since the med/late 1980’s. As far as I know, none of these bikes have a thermostat. I agree that it’s best to not overcool the oil, but using one of the commonly sized oil coolers will not do that.
 
I thought ideal oil temps would be slightly above 212F, to boil off any water condensation. +1 on the thermostat though...I run an 1150 cooler (no thermostat) and find the bike does take a long time to reach 212F (100C). With normal riding, unless ambient temp is in the 80's or higher (30C), or stop/go gridlock, temps will hover around 180F (82C).

Tony.
 
The an/ss fittings aren't needed when I'm only pushing 15lbs. Quality hose, stainless wrapping, and good barb nipples and clamps will hold ten times that without an issue so that's how I'll run.

I'm going to use a large oil cooler...5" X 12" X .75"...and a thermostat. I've already encountered the t-stat issue before and decided not to work too hard/pay too much for it. Instead of running around begging people to provide an inexpensive, handy gadget...I just machined a 2-piece housing out that will hold a common automotive style coolant t-stat. Works great.

I like to cruise between the 190 and 200 degree mark. On my old CB900C, even with a cooler on it twice the size of the stock piece, I routinely saw temps exceed 225*f...sometimes getting up to the 250+ area. With a smaller engine, more oil, and a larger cooler I'm sure I can keep the temps down but the t-stat will save me from the elongated warm-up times I was seeing on the CB.
 
Oil cooler on my GS850G

Oil cooler on my GS850G

Hey there, Cafe Kid! -- I tried sending you a private message just now, and got this: "TheCafeKid has exceeded their stored private messages quota and cannot accept further messages until they clear some space." Apart from the pronoun faults, this seems clear enough! :0 -- you gotta delete some messages!

What I said was that certainly we can get together and you can examine my set-up of the oil cooler [which someone else did for -- I m'self have all the mechanical aptitude of a chipmunk.... :-)

-- Bill
 
GSX1100--007.jpg


No thermostat. Older earl's measures 12X4X2. Operates close to 180 unless really cool outside then it might go down to 160. Course who knows how accurate stock temp gage is.

I'm not too worried about reduced engine life with water in the oil since it just turned 104K and the cooler has been on the bike for at least 20 years and 80K miles. Never seen any evidence of water in the oil.

I will say that I use to see a loss of performance and pinging on hot days before I added the cooler. Has Yosh pistons and cams. I use 1150 oil filter cover and have no problems with clearance related to the GSXR1100 forks. The cooler sits on the bracket so most of the weight is supported by the base of the bracket.
 
that's a very nice setup. It's a lot prettier than what I'll be doing but hopefully mine will be just as effective.
 
I've used a lot of different types of coolers over the years with my adapters, but my current favorite cooler is a very light, slim 12 row cooler. I have some here at the moment, they have cast in 3/8" barb type fittings, are only about 3/4 of an inch thick, by 11 inches wide, by 4.5 inches high. Thats a surface area of 49.5 inches, and great for tourers, commuters, or canyon racers.

I know some people here aren't convinced that a cooler is necessary, but that might be due to the low mileages done by some riders in some parts of the world, due to their milder climates. Here in Oz where it's pretty much 24/7 riding temps, (and where gas is so bloody expensive) our bikes get a real work out, and coolers are an essential accessory, just like good tires and good shocks should be.

I've also acquired a couple of old parts bikes that are absolutely buggered internally, due to high temp riding, and poor attention to oil change intervals, and I know that regular maintenance and a cooler could have saved them. If you're ever looking to buy another old GS, dump the oil out, and if it's black, send it back!

These coolers only just fit above the tach cable, but that's up nice and high, up away from the headers, (I recently saw a bike on which the owner had mounted a bracket for the cooler on the headers, and I just thought, "duh"!) up in the cool air, not blocking the flow to the cylinder head like some coolers do. (no one wants hot air off the cooler flowing over their head)

Being 3/8" and not 5/16" or smaller tubing like the old Lockhart and Derale coolers were, not to mention their much larger surface area, their physical size makes them super efficient, and when I had a gauge on my bike with an earlier adapter, even when I had 1073cc Yoshimura pistons and "road and track" cams, I never saw the VDO gauge climb much above 200 degrees.

I didn't run a thermostat then, but when I finish hot rodding my original GS1000S engine, I'll be installing a thermostat, and I might follow Macca's advice, and make my own using car parts.

Here's a pic of one my coolers, sorry about the quality, I can't find my digital camera, but at only 3/4 of an inch thick, it was easy to just scan it, ha ha! Cheers, Terry.

TerryscoolerJuly2008.jpg
 
terry said:
I've used a lot of different types of coolers over the years with my adapters, but my current favorite cooler is a very light, slim 12 row cooler. I have some here at the moment, they have cast in 3/8" barb type fittings, are only about 3/4 of an inch thick, by 11 inches wide, by 4.5 inches high. Thats a surface area of 49.5 inches, and great for tourers, commuters, or canyon racers.


Being 3/8" and not 5/16" or smaller tubing like the old Lockhart and Derale coolers were, not to mention their much larger surface area, their physical size makes them super efficient, and when I had a gauge on my bike with an earlier adapter, even when I had 1073cc Yoshimura pistons and "road and track" cams, I never saw the VDO gauge climb much above 200 degrees.

Here's a pic of one my coolers, sorry about the quality, I can't find my digital camera, but at only 3/4 of an inch thick, it was easy to just scan it, ha ha! Cheers, Terry.
Click to expand...


Terry,
Cooler looks good. Question about the 3/8" barbs: do you also use 3/8" barbs on the oil cooler adapter? I assume so but the fittings on the adapter photos look smaller than that. Hard to tell though from a photo.
 
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