Buzzing Solenoid

Purdydog · May 6th, 2018, 10:34

Hi all.

Stopped car this morning and this solenoid buzzed for 2-3mins after switching engine off.
[IMG]850 solenoid https://imgur.com/gallery/2ys2kVq[/IMG]
Not a clue what it is so a few questions:-
What is it, what does it do and is the buzzing a problem, it seems intermittent?

Thanks in advance....

Baffler · May 6th, 2018, 17:52

That'll be your EGR converter (vacuum solenoid) which controls the opening of the EGR valve. It's normal for it to cycle, usually whilst driving, and you don't hear it due to engine noise. To lower the buzzing noise you can pop off the top rubber hose and get a shot of PTFE spray oil in there to help lubricate the plunger.

Purdydog · May 7th, 2018, 06:42

Thanks Liam,

That makes sense.
Coincidentally I've just ordered an Egr blanking plate, once fitted would it be ok to disable the solenoid?

Barry

May 6th, 2018, 10:34	#1
Purdydog Yorkshire Exile Last Online: Nov 5th, 2019 13:18 Join Date: Nov 2010 Location: Exeter, Devon	Buzzing Solenoid Hi all. Stopped car this morning and this solenoid buzzed for 2-3mins after switching engine off. [IMG]850 solenoid https://imgur.com/gallery/2ys2kVq[/IMG] Not a clue what it is so a few questions:- What is it, what does it do and is the buzzing a problem, it seems intermittent? Thanks in advance.... __________________ 1999 Volvo V70 SE 2.4 non turbo Petrol - manual gearbox... 208k miles & counting....Deceased - the dreaded ETM.... 1996 850 tdi glt 132k

May 6th, 2018, 17:52	#2
Baffler Premier Member Last Online: Yesterday 19:44 Join Date: Dec 2002 Location: Co. Limerick, Ireland	That'll be your EGR converter (vacuum solenoid) which controls the opening of the EGR valve. It's normal for it to cycle, usually whilst driving, and you don't hear it due to engine noise. To lower the buzzing noise you can pop off the top rubber hose and get a shot of PTFE spray oil in there to help lubricate the plunger. __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

May 7th, 2018, 06:42	#3
Purdydog Yorkshire Exile Last Online: Nov 5th, 2019 13:18 Join Date: Nov 2010 Location: Exeter, Devon	Thanks Liam, That makes sense. Coincidentally I've just ordered an Egr blanking plate, once fitted would it be ok to disable the solenoid? Barry __________________ 1999 Volvo V70 SE 2.4 non turbo Petrol - manual gearbox... 208k miles & counting....Deceased - the dreaded ETM.... 1996 850 tdi glt 132k

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