what is the proper and best way to flush an oil cooler? and how often shoudl this be done?

 

if the oil and oil filter is regularly changed, there should be little need to flush one out.

If you think there is a need you may wish to remove the thermostat bolt/valve on it and check if there is any sludge. A lack of sludge would indicate no need to flush the cooler.

 

alright, and now assuming that i do need to flush it (and i do not knwo for sure yet) how would i got about that?

 

i took the thermostat out and ran cleaner through it as best i could w/ mine. i think the piston in the thermostat has to be rigged or something to actually do a good "flush"
someone on here said airplane shops know how to clean them properly

 

I send mine t a FAA certified repair facility and have the flush performed. It is Hot flushed for 24 hours in flushing solution (I believe Vetrol) and then the fins are straightened and the unit is pressure tested, The final step is the unit is alonized to prevent corrosion.

 

Damn, how expensive is that??

 

125-175. You waanna play, you gotta pay. I posted pics of it a while back

 

https://www.rx7club.com/forum/showth...ighlight=flush

This thread has pics in it