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IDI Engine
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Boost relief valve? What and where is it??
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Topic: Boost relief valve? What and where is it?? (Read 2910 times)
October 09, 2004, 07:29:29 am
Topherdiesel
Junior
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132
Boost relief valve? What and where is it??
«
on:
October 09, 2004, 07:29:29 am »
Just as the topic says, whats this where is it, whats it do???
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Reply #1
October 09, 2004, 10:12:56 am
VWRacer
Veteran
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649
Boost relief valve? What and where is it??
«
Reply #1 on:
October 09, 2004, 10:12:56 am »
The BOV is mounted to the intake manifold, and bleeds excess boost back into the compressor intake hose. In the photo below I have removed the BOV, but you can see where it mounts at the end of the intake manifold (right in photo).
In this photo, you can see where I have plugged the BOV by adding a plastic cap from a spray can. This cheaply and eaily totally defeats the BOV. [CAUTION: Defeating the BOV can lead to overboost condition and severe engine damage. Proceed at your own risk!]
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Stan
C-Sports Racer
Reply #2
October 09, 2004, 09:27:15 pm
Chouby
Newbie
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2
Boost relief valve? What and where is it??
«
Reply #2 on:
October 09, 2004, 09:27:15 pm »
you can made easily... just take out the little pipe into the intake (after air cleaner) and put a pepsi... or 7up... i don't care.. and put it in and tight it with what you take to tight any other hose..
I've got the word on my lips but .. it stay there.. lol!! :lol:
Good luck..
Chouby
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Reply #3
November 02, 2004, 04:34:25 am
web
Junior
Offline
56
Boost relief valve? What and where is it??
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Reply #3 on:
November 02, 2004, 04:34:25 am »
Is it really an overboost vent valve or perhaps just a bypass valve to suck in air when the turbo is not running? I guess I should take it out and see for myself. BOV's as such are not exactly common (or even used at all) on diesels... and the hose to the intake tube tore off on mine so I have a good reason to mess with it
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Current car: '92 Fiat Croma TDID, similar to VW TDI only completely mechanical DI - with VE-style pump.
Previous car: '84 mk2 diesel, w/1.6TD swap ('86 hyd engine), 9mm plunger, KKK K24.
Reply #4
November 02, 2004, 07:13:49 am
AntonUK
Guest
Boost relief valve? What and where is it??
«
Reply #4 on:
November 02, 2004, 07:13:49 am »
Its really more for protection, incase wastegate fails and turbo overboosts etc
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Reply #5
November 04, 2004, 01:44:03 am
vwmike
Authorized Vendor
Veteran
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1158
Boost relief valve? What and where is it??
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Reply #5 on:
November 04, 2004, 01:44:03 am »
Why not just tap a freeze plug into the hole? Or if you want a temporary fix, put a rubber plug on the outside of the valve? I would worry about that cap falling into the intake and/or melting.
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Reply #6
November 04, 2004, 08:04:22 am
web
Junior
Offline
56
Boost relief valve? What and where is it??
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Reply #6 on:
November 04, 2004, 08:04:22 am »
Reading the archives I just saw a pic where someone had made up a blockoff plate and installed it using the stock clamp and RTV. I thought that was a pretty neat solution. Don't remember who though.
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Current car: '92 Fiat Croma TDID, similar to VW TDI only completely mechanical DI - with VE-style pump.
Previous car: '84 mk2 diesel, w/1.6TD swap ('86 hyd engine), 9mm plunger, KKK K24.
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VWDiesel.net The IDI, TDI, and mTDI source.
»
Engine Specific Info and Questions
»
IDI Engine
(Moderators:
malone
,
burn_your_money
,
Vincent Waldon
,
theman53
) »
Boost relief valve? What and where is it??