thermostat application

[quicksix]

Hey guys, longtime lurker, first time poster. I have a question about my engine, a72t spec in a factory 9146. recently gone through and runs great. I have checked my thermostat by boiling,operationally opens closes fine but I am getting oil spray on my rear window?? I checked all breather hoses, pressure switch, and thermostat. After cleaning everything off it appears my thermostat is the source of the spray. I have a late model tstat(74on) and want to drop it in and see if it eliminates the spray. The ports in the side of the late model are a bit bigger, but other than that is there a problem with putting the newer model t-stat in to see if that stops the spray?...what say the collective wisdom? thanks John

[356RS]

Is your O-Ring around the thermostat in good shape? Is it the correct size? Also your crank case breather hose connection at the case could be loose, the hose clamp?

[quicksix]

thanks for the reply Mark, yeah the o ring was the first thing I replaced, then took off the breather hoses and reconncected, making sure they were all tight. As far as being the right size, when I ordered it the parts guy looked it up, and when I put it on it seemed to fit good, although now that you mention it it was more cylindrical then the one I took off, I chalked it up to the old one flattening out after awhile. I am going to wrap all the breather hoses next, and possibly throw the other t-stat in there, Im just not sure about possible damage from having the wrong t-stat in the engine.

[aws]

The thermostats are all interchangable. The early stats were adjustable with a stud and nut but all are interchangeable.

aws

[quicksix]

Thanks AWS, will give it a try!