pressure testing

[super27]

evening all As I now have two 13bs on the bench with good compression, I was thinking about doing some sort of pressure check on the coolant system. Question is does any one know of any values for a pressure decay check ie psi drop over a given amount of time and what to pump it up to initialy. I have access to all the tools and equipment know to man so silly not to do it, at least it may prove the integrity of the water seals.
Also just just like to say what the hell was mazda thinking when they passed the wiring harness through the ABS support:Hammer

[m1tch]

evening all As I now have two 13bs on the bench with good compression, I was thinking about doing some sort of pressure check on the coolant system. Question is does any one know of any values for a pressure decay check ie psi drop over a given amount of time and what to pump it up to initialy. I have access to all the tools and equipment know to man so silly not to do it, at least it may prove the integrity of the water seals.
Also just just like to say what the hell was mazda thinking when they passed the wiring harness through the ABS support:Hammer

Hi mate, there is a cool video on pineapple racing, here it is:

http://www.rebuildingrotaryengines.com/videos/cooling-system-pressure-test-tool

Shows what you can do

[L18M]

bit of a lazy reply but there is a vid on pressure testing
hope it helps
http://www.rebuildingrotaryengines.com/

[Prof]

Mitch wins by a minute
 
I am rebuilding an engine and plan on using the pressure test thing I got when I did my central heating - going to 1 Bar of pressure and leave for half an hour and see if it goes down any...

[super27]

thanks guys going to have ago on my next shift off i will let you know my findings

[super27]

been playing with the pressure test rig at work this week, so far tested 2 ASTs both leaking around the cap at 1 psi new cap rated at 13 psi let go at 8 psi  HKS cap rated at 15 psi let go at 12 psi, standard intercooler let go at 5 psi, oil coolers took 25 psi then i got a bit nervy as I need them, the old 92 engine held 10 psi for 18 mins and dropped to 8 psi after an hour, the 95 engine held 10 psi for 1 hour(bit of luck as thats the one going back in) The intercooler was the intresting thing though hard to seal up for testing so not very conculsive. the rad caps on the other hand may make interesting reading for some