Oil Cooler By Pass

[Guest]

Saw this on ebay .. how does it work ?

Does it have a thermostat in it or what ?

[Nessism]

Yup, thermostat. Oil is routed though the cooler once a certain temp. is reached - not sure what the set point is.

[mriddle]

Couldn't see any adjustment on it ..

Thanks

[srsupertrap]

The BP-180 thermostat opens at @ 180F. I believe it was designed to be non-servicable, not saying you couldn't open it up though. It was probably a press fit with a O-ring on that one side.

[mriddle]

Makes all kinds of sense.

The BP-180 thermostat opens at @ 180F. I believe it was designed to be non-servicable, not saying you couldn't open it up though. It was probably a press fit with a O-ring on that one side.

[Griffin]

So does this device also act as a check valve when no oil is flowing through it? I'm asking because I just bought a Lockhart oil cooler with this exact same thermostat in the lines, and was just curious.

[srsupertrap]

Sort of, I imagine the design utilizes a bi-metalliac spring in the housing that pushes a slide port to let oil flow to the cooler above 180F. Below that temp the oil port is closed and merely routes your oil back to the oil pressure housing. So unlike a check valve the BP-180 won't hold the oil in the oil lines or oil cooler after you stop the engine. The oil will drain back to the lowest point.

The Lockhart thermostats are kinda rare but I did quick serach on FleaBay and found this item which may be of interest to someone with a oil cooler on their GS and would like to add a thermostat. Just hide it under the tank so no one sees it

http://cgi.ebay.com/ebaymotors/Harley-Oil-Cooler-Thermostat_W0QQcmdZViewItemQQcategoryZ35572QQihZ004QQitemZ140301543471QQrdZ1QQsspagenameZWDVW

[Griffin]

Sort of, I imagine the design utilizes a bi-metalliac spring in the housing that pushes a slide port to let oil flow to the cooler above 180F. Below that temp the oil port is closed and merely routes your oil back to the oil pressure housing. So unlike a check valve the BP-180 won't hold the oil in the oil lines or oil cooler after you stop the engine. The oil will drain back to the lowest point.

The Lockhart thermostats are kinda rare but I did quick serach on FleaBay and found this item which may be of interest to someone with a oil cooler on their GS and would like to add a thermostat. Just hide it under the tank so no one sees it

http://cgi.ebay.com/ebaymotors/Harle...spagenameZWDVW

Nothing a little shot of black paint wouldn't cure.

[80GS1000]

You can also get a remote oil thermostat from Perma-Cool. Works on the same principle as the ones above, just that they have either NPT threads so you can use them with stainless lines. Perma-Cool is about $40. Mocal also makes nice thermostats but they're at least twice as expensive as the Perma-cool.

http://store.summitracing.com/egnsearch.asp?N=700+115+304354&D=304354

Also www.anplumbing.com for Earl's lines and fittings.