Motorcycle Repair: SHOVELHEAD OIL TANK PRESSURE, oil temp guage, vent line

Question

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Followup To

Question - ok...i did what yuo asked...yes i have good oil flow when bike is running from return..when i like the bike warm up and put my hand over tank..yes there is pressure..not enough to blow my hand off..but definalty pressure there

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Followup To

Question -
HI..I HAVE A 73 SHOVEL, THE OIL TEMP GUAGE IN THE TANK HAS POPED OUT OF THE TANK TWICE SO FAT THIS SESASON...1ST TIME I THOUGHT MAYBE MY LEG HIT IT. SO I PUT ANITHER IN..THEN MY LEG STARTED GET HOT AGAIN..AND YES...OIL ALL OVER..I CHECKED THE VENT LINE..ALL CLEAR..WHAT COULD THIS HIGH PRESSURE IN THE TANK BE CAUSING THE PLUG TO COME OUT?

Answer -
Check all the lines going to the oil tank and from the inner primary.
Good luck and happy riding
Mike
I CHECK ALL LINES..AND ITS A OPEN BELT DRIVE ANY MORE IDEAS

Answer -
Do a couple of things for me. First, start the bike and looking in the tank, make sure you have an oil flow. you should see it moving.
Next, let the bike warm up and remove the oil cap and put your hand over it. is there pressure trying to push your hand off?
mike  

Answer
You should have a little pressure on the tank, its from the vent. The pressure to the tank comes from the up an down movement of the pistons. The only thing that would pressurise the tank you be somthing plugged inside the motor.
Start the bike and let it sit and keep reving it up. If you are getting to much pressure the oil cap will pop off very soon. If it doenst then it might be just vibrating out
Good luck and happy riding
Mike