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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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2.3 T5 Engine compression PSIViews : 8477 Replies : 15Users Viewing This Thread : |
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#1 |
Junior Member
Last Online: May 30th, 2012 20:41
Join Date: Apr 2007
Location: huddersfield
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Hi there just a quick one can anyone tell me what the 2.3 T5 engine compression should be in psi ?
Thanks in advance
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Volvo 850 T5 GLT Mods so far -Polybush top engine mounting, SamcoTurbo hoses, Bailey dump valve Forge blanking plate, Tinted windows |
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#2 |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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round about 180 psi i would think but the more important thing is the DIFFERENCES in readings between cylinders ... and when doing the compression test the engine must be warm and throttle held fully open ...
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#3 | |
S60 R
Last Online: Aug 2nd, 2019 11:43
Join Date: Oct 2004
Location: United Kingdom
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http://www.centauro-owners.com/articles/psibar.html |
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#4 |
Junior Member
Last Online: May 30th, 2012 20:41
Join Date: Apr 2007
Location: huddersfield
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thanks for your replys ! Just a bit paranoid seen as my engine has been collected today and the bloke said hes remembered all cylinders were 150psi... he said this as if it was a good thing and i should be impressed !
![]() Its gunna have to go in anyway as i need a car. If its pants ill just rebuild the old engine and hope this lump lasts till i can afford the rebuild.
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Volvo 850 T5 GLT Mods so far -Polybush top engine mounting, SamcoTurbo hoses, Bailey dump valve Forge blanking plate, Tinted windows |
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#5 | |
S60 R
Last Online: Aug 2nd, 2019 11:43
Join Date: Oct 2004
Location: United Kingdom
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#6 |
Premier Member
Last Online: Apr 19th, 2024 12:58
Join Date: Dec 2009
Location: Harwich
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Hi peeps,
I have a Thread in Compression tester gauge and i would like to carry out a compression test on my 850 t5 lump. How do i carry out the test? should i remove one plug and crank it over 4-5 turns? on the starter? or will this give wrong readings? Any help much apreciated.
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HLM304, Forge unos 17.5psi at 3.8 bar, 18t, Me7 Manifold, Blues, Walbro, De-cat, Ported n Polished Head, 3" Dp stainlesss exhaust, Carbon Air intake, Polly Bushed thoughout. |
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#7 |
Premier Member
Last Online: Apr 19th, 2024 12:58
Join Date: Dec 2009
Location: Harwich
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HLM304, Forge unos 17.5psi at 3.8 bar, 18t, Me7 Manifold, Blues, Walbro, De-cat, Ported n Polished Head, 3" Dp stainlesss exhaust, Carbon Air intake, Polly Bushed thoughout. |
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#8 | |
Experienced Member
Last Online: Today 14:28
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#9 | |
Junior Member
Last Online: Oct 29th, 2015 20:51
Join Date: Jan 2013
Location: essex
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#10 |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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Your pressure is pretty healthy and with the large inlet manifold volume it probably wont make a lot od difference , but it is normal praqctice to open the throttle so you get a full charge of air into the cylinder to compress . If you crank it with throttle shut incoming air is restricted so pressure will be less .
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