Hey.

 

I've made my own boost leak tester for my PD130 which looks like this:

 

 

 

 

 

When i've been performing the test i've been putting my hand over the oil breather connector which is making a complete seal as the pressure is building up. 

 

However it appears the system won't hold pressure over 10 psi, it's leaking from somewhere but it's not obvious and I can't hear it due to my compressor making such a racket. I was wondering if I have to blank anything else off like the inlet pipe where it goes onto the EGR?

 

I've read on the forums that with diesels you don't have to blank this bit off as the valves overlap and air won't escape however is this right?! I've sprayed my connectors with soapy water and no bubbles appear but I havent had chance to do the intercooler yet.

 

Any advice on how to perform the test? Thanks!

Edited 9 October, 201312 yr by Dann2707

That's interesting. What have you used to connect the can to the intake pipe?

I bought a cheap universal cone filter from eBay ages ago and the rubber adapter came with it and luckily it fit on the can absolutely perfectly

unless you have taken the camshaft out there going to be at least one valve open mate you need to blank the boost pipe off at the manifold/egr to pressurise the pipework, or take the cam out lol

I thought that, its impossible to have all 4 valves shut at once, but then I think surely if one valve is open the exhaust will be shut still holding in pressure? Unless i'm completely wrong (been a long day) haha

Yea kinda but here will be some lost past the rings etc too have you tried holding the anti shudder valve closed while testing it?

Even if though you'll have open intake valves your piston rings should make a good enough seal not to lose pressure, you shouldn't need anymore than 10 psi to find a leak. Your system is basically the same as what I've used for HGV/PSV intercooler leaks.

I managed 18 psi doing the same thing but I turned over the engine a few times first

Yea kinda but here will be some lost past the rings etc too have you tried holding the anti shudder valve closed while testing it?

 

I haven't actually mate! Would that make a perfect seal? 

 

I might take it all off Friday and really get to the bottom of this. I've seen a pic where the air duct that attaches to the intercooler rubs on the alu and causes leaks. Will inspect it and report back!

I think the weak points are bottom pipe to intercooler and turbo outlet pipe.

My turbo outlet pipe where it connects to the turbo itself is sealing beautifully I think but the other end is a different story

It's all scratched and the lug looks worn?!