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1994 Volvo 850 EGR cleaning

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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1994 Volvo 850 EGR cleaning

Post by mmd94 » Fri Mar 07, 2014 1:02 pm

Hello, I was recently replacing my PCV system. upon doing this I noticed A LOT of carbon build up. The EGR being the worst. The ports had no airflow at all, and the build up was hard to break through. Probably gonna be easy to remedy, but I cant seem to remove the pipe from the valve. Can someone help?

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Ozark Lee

Re: 1994 Volvo 850 EGR cleaning

Post by Ozark Lee » Fri Mar 07, 2014 1:58 pm

Getting the valve off is always a bear. I have found the path of least resistance to be to remove the valve from the intake manifold by removing the two small bolts (hand cramp alert) that bolt the valve on from below. Once the intake manifold is use long wrenches to loosen the pipe. I'm not so sure I didn't use a big pipe wrench the last time I did it but that was a few years ago.

The main thing to get clean is the hole through the bottom of the intake manifold itself. For the valve, you can usually just use brake cleaner on it while it is in place and get it clean enough.


'94 850 N/A 5 speed
'96 Platinum Edition Turbo
'99 V70XC - Nautic Blue
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

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Re: 1994 Volvo 850 EGR cleaning

Post by rspi » Fri Mar 07, 2014 3:02 pm

I have a video on YouTube about it. You can go to YouTube and type in "Volvo 850 EGR Cleaning".

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'98 S70 GLT, Lil' Red 25/32 mpg
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Re: 1994 Volvo 850 EGR cleaning

Post by Paul-93-850 » Wed Jun 13, 2018 5:29 pm

After cleaning how do you know if it is still functional? Is there any kind of test?

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Re: 1994 Volvo 850 EGR cleaning

Post by lcc014 » Wed Jun 13, 2018 5:47 pm

Vacuum test if you have mightVac to make sure valve inside EGR is still in working condition.

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