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Engine Help 850 T5

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Matt9711
Posts: 2
Joined: 16 June 2025
Year and Model: 850 1997
Location: UK

Engine Help 850 T5

Post by Matt9711 »

I have just had a full rebuild on my 1997 T5 engine. On the rocker cover there was an outlet or inlet that was sealed with some weird silicone, this has been removed and I can see there is a valve or similar that is supposed to be bolted in to this hole. I cannot find any info on what should be there. Don't be fooled by the 1997 model year as the engine has a new block which may be older or newer! The engine runs beautifully now but need to know what should be bolted on here. Any help is hugely appreciated and ideas of where to get the parts as well.

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BlackBart
Posts: 6506
Joined: 10 December 2016
Year and Model: 2004 XC70 BlackBetty
Location: Over the far far mountains
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Post by BlackBart »

Can you post a pic of the area? Someone here will know.
ex-1984 245T wagon
1994 850T5 wagon
2004 XC70 wagon BlackBetty

Matt9711
Posts: 2
Joined: 16 June 2025
Year and Model: 850 1997
Location: UK

Post by Matt9711 »

This is the hole
Attachments
IMG_2540.jpg

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jreed
Posts: 1619
Joined: 8 March 2009
Year and Model: '97 Volvo 855 GLT
Location: RTP, North Carolina
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Post by jreed »

There is some helpful information about the hole in this thread, including pictures / workarounds:

viewtopic.php?p=547832
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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