Installing Oil cooler on \"J\" Engine

This past weekend, I installed my new 1135 10.25 pistons and cyls onto my M2. Fired right up, and seems to be running well, though I've only done a few laps around the neighborhood so far (need to get it registered and insured before I do any serious road testing).

Now my thoughts are turning to possibly adding an oil cooler. I've done some reading on this site about oil coolers, and I wasn't able to find all the info I needed. So here's my question.

Where do I need to hook up the oil lines to the engine? On the "J" engine, it looks like there is a plug just below the cyls on the right side. I assume that is where I would attach one hose.

There appears to be another plug in the side of the oil pressure switch mount. Is that where I would attach the other hose?

Another question. How important is it to have a thermostat switch?

Are there any KZ models that came with oil coolers that would just bolt-on to my M frame? I see on the frame that there are mounting holes there. Anyone know if coolers from any other specific model have the same spacing?

Thanks.

HI, I too have an 82kz 1000j model been looking for fitting for a kz 1100 or a zn 1100 models that came with a cooler. they have an o-ring fitting for both on top of the block. anybody have some? please reply thanks .

HI, I too have an 82kz 1000j model been looking for fitting for a kz 1100 or a zn 1100 models that came with a cooler. they have an o-ring fitting for both on top of the block. anybody have some? please reply thanks .

wrong hole, get an oil cooler switch/fitting from any gpz1100 or the oilcooler cop bikes, basically any big thousand that came from the factory with it.

its the device next to the crancase vent, your oil pressure light connects to it, most gpz fittings do not have that sensor, any automotive oil guage will plug into that plug you are talking about on the right.

i bought a Nos oil cooler for a gpz and waited and waited untill a fitting poped up on ebay, it came all the way from austrailia, its a bolt on procedure with no hose making or tapping needed.

when looking on ebay try searching using the word "switch" as well, it may take a few weeks for one to pop up.

or try your local parts yard.

Skyman wrote:

This past weekend, I installed my new 1135 10.25 pistons and cyls onto my M2. Fired right up, and seems to be running well, though I've only done a few laps around the neighborhood so far (need to get it registered and insured before I do any serious road testing).

Now my thoughts are turning to possibly adding an oil cooler. I've done some reading on this site about oil coolers, and I wasn't able to find all the info I needed. So here's my question.

Where do I need to hook up the oil lines to the engine? On the "J" engine, it looks like there is a plug just below the cyls on the right side. I assume that is where I would attach one hose.

There appears to be another plug in the side of the oil pressure switch mount. Is that where I would attach the other hose?

Another question. How important is it to have a thermostat switch?

Are there any KZ models that came with oil coolers that would just bolt-on to my M frame? I see on the frame that there are mounting holes there. Anyone know if coolers from any other specific model have the same spacing?

Thanks.

This is a picture of a 1981 GPz1100 Oil Cooler bypass and should fit most any "J" model cases. The bypass does in fact come with the oil pressure switch from the factory and you can see the large threaded hole where it screws in.
You can use a stock GPz1100 cooler and lines or you can drill and tap for fittings as I have done.

You can see the pressure switch installed in this picture

Post edited by: tuxedotito, at: 2008/01/04 08:15

i got mine from these guys cost 100$ all in.

www.americanclassix.com/kawa_improvements.html

kzstreetfighter71 wrote:

i got mine from these guys cost 100$ all in.

www.americanclassix.com/kawa_improvements.html

Thanks. If I can't find a cheaper used GPz unit on Ebay, I may go with that option.

Skyman, don't know much about the 1000/1100's but is this kinda what you need?

Vintage KZ,Z1,900,1000 oil cooler fittings

Bluemeanie wrote:

Skyman, don't know much about the 1000/1100's but is this kinda what you need?

Vintage KZ,Z1,900,1000 oil cooler fittings

Yeah, I saw those too.

No, I think those are only for the older engine style, and they won't work on the "J". Thanks, though.