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We ran it some more and paid close attention to what is going on.
When we run it next time I will check temp difference on core ... we did pull the core, clean it, seal it, reinstall etc not too long ago ... I also blew it out the other day but nothing impressive came out of it. The fan belt was adjusted to be a little tighter so it would be in spec according to the book and the airflow through the core seems substantially better after all of this. We also tested the thermostat and it was within spec. We did not open the airlock (I think if I recall it was in a tight spot up under the petcock / site glass for the pony motor) but I can do that ... does it need to be on to do this or can I keep it shutdown? We do still have a small radiator leak but we top off the fluid here and there ... someone suggested we use BARS flakes vs liquid to fix this.
Cycling the the hydro does help ... I haven't noticed any issues since topping it off ... the frustrating part is knowing when it is "full" and when it isn't as you can barely see down into that tank :/
it could still have some crud deep inside the cores which requires rodding to remove this must be done very gently or the core can become punctured.
if you can see the leak and access it the best is to flow a little solder over it fixing it pemanantly.
yes it can be bled without running the main but its best if you do have it idling as low as possible. yes the bleeder is on the pilot motor in a shit of a spot to get to on the pilot air cleaner side it screws into the top cover of the pilot motor. spray it liberally with penetrating fluid to free it up first. the best would be to replace the tap. work a bit of clear hose over the tap end so you can see any bubbles of air same idea as bleeding the brakes on the car. have the offsider slowly top off the rad until no more bubbles appear this may take a few goes to get all the air out.
the hydro oil should be visible in the bottom of the filler neck when running well thats how we did ours. after we re shafted the rams it took a few goes to get all the air out
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