I'm doing a plenum pull and coolant bypass on the Silver zed. I've changed heater hoses and bypassed the plenum, so I should be able to fill it up again. What's the easiest way to do a pressure test of the cooling system ? It seems logical to do it while the plenum is off with good access to all the remaining hoses.
Without a pressure tester, just 1/2 bar (aka 7 PSI) from an air compressor in through the overflow pipe on the neck of the radiator (with the cap on) will do the job. You'll know if the system has held pressure, as if you leave the cap on for 15 minutes and then pull it off, water will fly out under pressure. At least it will be cold though
So, the cap will limit the pressure to 7 PSI and there is no risk of overpressuring this way ? Or do I need to use a tyre gauge to get the right pressure ?
No, the cap can't limit pressure in this way, as the path for the pressure limit is into the over flow bottle. Just set your pressure on the air compressor to a few PSI (similar to doing a boost leak test). If you have not connected a hose correctly, or have a loose clamp, then it doesn't take much pressure at all to show a leak
oh thankyou :thumbup: thankyou :bow2: thankyou :thumbup: thankyou :bow2: thankyou:thumbup::thumbup: I you can't tell I've been needing to do this for sometime as I'm chasing an annoying little bugger of a leak...which I can now find with little expense. Oh Gregory, thaaaannnnkkkyoooooooouuuuuuuuuu (sung in a sorta opera style way)
ROFL We tested Magic Mike's this way on the pre-Cowra tech day plenum pull / coolant bypass. After 15 minutes of leaving it pressurised, we pulled the cap off, and cold coolant went 12 feet in the air, and we all got a cold shower . We considered that a success, all be it a messy one So, just a few PSI is needed :bash:
