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Model specific boards => Golf mk4 => Topic started by: rio_gti on 02 September 2014, 23:50

Title: Pressure testing
Post by: rio_gti on 02 September 2014, 23:50

Hey all!!! (Again!!!)

When doing a pressure test, if I block at the tb and pressurise from just after the turbo, it holds.
But, if I block the tb and pressurise from the tip, I get a gloopy bubbling sound from the back of the engine (sounds like its coming from in the sump  :undecided: )

Is this normal?

Title: Re: Pressure testing
Post by: Dalo Harkin on 03 September 2014, 12:38

you got a modern pic of the bay?

surely any bubbling would be the pressure making the oil in the sump bubble?

Title: Re: Pressure testing
Post by: rio_gti on 03 September 2014, 14:44

Well that's what I thought but is air meant to get it there via (I think) the turbo?

I'll get some pics soon!!!

Title: Re: Pressure testing
Post by: Tezmax on 21 September 2014, 17:46

Cut my pressure tester down to a reasonable size and plugged into tip and it held preesure until dip stick or oil filler cap was removed then i got the gurggle/bubbling sound. Blew some smoke through the system and came out oil filler cap only. Does this mean i have no vac leaks?

Title: Re: Pressure testing
Post by: rio_gti on 21 September 2014, 21:39

You still got the hockey puck etc all connected?

Title: Re: Pressure testing
Post by: Tezmax on 22 September 2014, 00:09

Yep, didn't disconnect anything else. Was hoping to find a leak somewhere but it doesn't appear to have one.  :angry:

Title: Re: Pressure testing
Post by: rio_gti on 22 September 2014, 08:12

Makes sense.... As my breathers are straight to atmosphere that's why my 'bubbling' is straight away, so if I were to block them both it should hold pressure in the block (didn't think this was any good to do  :undecided: )

Did you block the pipework at the tb?

Title: Re: Pressure testing
Post by: Tezmax on 22 September 2014, 17:42

Held pressure under my own breath and it blew back when releasing me gob :sick: Didn't connect my compressor with regulator yet as not totally confident in what i'm doing.

Left tb alone, i guess it would be in the closed position when engine not running but would that be air tight :undecided: I wouldn't of thought so

Finished product:

(http://i1264.photobucket.com/albums/jj499/Tezmax/20140922_174815.jpg) (http://s1264.photobucket.com/user/Tezmax/media/20140922_174815.jpg.html)