Air leaks are part and parcel of 300zx ownership and ensuring all is ok is can be tricky, even with the right equipment.

 

The zed in the photo had several issues leading to real bad running both at tickover and on the road, the owner lives in Norway and had little choice but to pack it into a container and send it to us.

 

After all the other issues where dealt with, the final air leak that is shown in the following photo`s was loosing a surprising amount of boost given the pipe size.

 

 

 

 

 

 

 

 

The small pipe which is part of the boost solenoid assembly is not an uncommon one to come adrift but what a difference it made, boost leak checks in my opinion should be part of your normal servicing routine, beg, make or buy a boost tester flange and get a small compressor you will be surprised on even zeds which appear to be running ok can have leaks.

 

Jeff TT

Air leaks are part and parcel of 300zx ownership and ensuring all is ok is can be tricky, even with the right equipment.

 

The zed in the photo had several issues leading to real bad running both at tickover and on the road, the owner lives in Norway and had little choice but to pack it into a container and send it to us.

 

After all the other issues where dealt with, the final air leak that is shown in the following photo`s was loosing a surprising amount of boost given the pipe size.

 

 

 

 

 

 

 

 

The small pipe which is part of the boost solenoid assembly is not an uncommon one to come adrift but what a difference it made, boost leak checks in my opinion should be part of your normal servicing routine, beg, make or buy a boost tester flange and get a small compressor you will be surprised on even zeds which appear to be running ok can have leaks.

 

Jeff TT

 

another great post jeff:bow:

Jeff,

 

I see from your first picture that your using a tyre inflator to supply the compressed air through the intake system im assuming you regulate the pressure and its not the full line pressure from your compressor.

Jeff,

 

I see from your first picture that your using a tyre inflator to supply the compressed air through the intake system im assuming you regulate the pressure and its not the full line pressure from your compressor.

 

i think all you need is about 5-7 psi bud....thought ide hijack your question aimed at jeff incase you put 100psi in it and blow the pipes off;)

i think all you need is about 5-7 psi bud....thought ide hijack your question aimed at jeff incase you put 100psi in it and blow the pipes off;)

 

thought i'd just bring it up just incase you did :D

You dont need a huge amount of pressure to find the leaks, strangest ones I found were from the nuts holding down the balance bar, the studs go into the plenum and if like me you lost the posh domed nuts they leak round the threads.

 

Oh yea if any one has a few spare I still need to replace them

thought i'd just bring it up just incase you did :D

 

;)

fry1 i have some spare ss domed nuts if you need some.

 

Think you need 4 in all.

Yes if I dumped the 150psi in our compressor receiver into the intake in one go I think I would cetainly have a boost leak then :rofl:

 

Jeff TT

 

 

Jeff,

 

I see from your first picture that your using a tyre inflator to supply the compressed air through the intake system im assuming you regulate the pressure and its not the full line pressure from your compressor.

Yes if I dumped the 150psi in our compressor receiver into the intake in one go I think I would cetainly have a boost leak then :rofl:

 

Jeff TT

 

:rofl:

guide to boost leaks here if it helps folks

http://thumper300zx.com/z32/tech.htm

guide to boost leaks here if it helps folks

http://thumper300zx.com/z32/tech.htm

 

Good link mate:bow:

what happens if you put say.. 14psi into it?

what happens if you put say.. 14psi into it?

 

tricky tricky..licky licky:slap:

seriously lol... what 'could', 'will' happen?

seriously lol... what 'could', 'will' happen?

 

:rofl::rofl::rofl:you gorra be havin a girafe aint ya jooly

In your case Joel id imagine the wastegates would open and youd have a huge leak into the exhaust.Your only running stock boost on those tubbies ya tight wad.get some 555s and let them spool more :D

:rofl::rofl::rofl:you gorra be havin a girafe aint ya jooly

 

no lol... i had some mad impression that the crank case had the same pressures that i read on the oil pressure gauge :o iv since seen the error of my ways and will go and sit on the dumbass step!

In your case Joel id imagine the wastegates would open and youd have a huge leak into the exhaust.Your only running stock boost on those tubbies ya tight wad.get some 555s and let them spool more :D

 

must murder wife!

In your case Joel id imagine the wastegates would open and youd have a huge leak into the exhaust.Your only running stock boost on those tubbies ya tight wad.get some 555s and let them spool more :D

 

got a koyo and some greddy smic now too so she would be lapping up a bit of 555 @ 14psi action!

 

bugger... just realised the severity of this thread hijack! feel free to delete as necessary bri :wack:

We always test mine with 9psi max (0,6 bar in AUT),

Found many leaks first time, now that we changed tubs we

got anything tight.

 

By the way,- i test mine every 2-3months, takes only 5 minutes...

 

Also asked myself what happens if you push 15psi in?

Will it only blow off the small hoses or is there serious damage possible...?

As a newcomer to the Turbo world, where would you put the compressed air in?, Jeff was talking about a boost tester flange, is this a home made item?

 

Regards

 

rich

must murder wife!

 

:rofl::rofl::rofl:..just stich her mouth up and you still have the comfort of a wife who cant moan