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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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10v or 20vViews : 1910 Replies : 6Users Viewing This Thread : |
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May 17th, 2002, 09:04 | #1 |
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10v or 20v
Hi everyone
I am about to buy an 850 2.5 CD but there is no reference to the amount of valves the engine has anywhere, this includes the V5 document. The seller doesn't know either but thinks it's 10 (possibly because he doesn't want to mis-represent the vehicle). Now under the bonnet there is a sticker that says DOHC, call me old fashioned but a double cam in my experience with engines (which is a little limited) usually drives 4 valves per cylinder, am I correct? Can anyone help Thank you Agent Orange |
May 17th, 2002, 09:11 | #2 |
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Last Online: Apr 24th, 2008 19:02
Join Date: Dec 2000
Location: Leicester
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RE: 10v or 20v
It's almost certainly a 10V - the 20V had a plug cover saying so, and the twin cam simply means one cam drving inlet valves and one driving exhaust valves.
To confirm this, give the VIN no to your Volvo dealer and they will find out. |
May 17th, 2002, 09:12 | #3 |
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RE: 10v or 20v
You are right that two cams are needed to drive 4 valves per cylinder, so it's more than likely a 20V.
My 850 actually has 20valve printed on the spark plug cover, but for some reason most of the ones I have seen just have DOHC ? Si |
May 17th, 2002, 11:15 | #4 |
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Last Online: Sep 23rd, 2008 23:28
Join Date: Jan 1970
Location: Kinross
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RE: 10v or 20v
Unless I'm very much mistaken, my 10V 2.5 is DOHC.
Very nice motor is it too. Alastair Lauener |
May 17th, 2002, 20:59 | #5 |
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RE: 10v or 20v
Thanks for your help.
Cheers Agent Orange |
May 18th, 2002, 09:50 | #6 |
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Last Online: Apr 10th, 2017 16:55
Join Date: Jan 1970
Location: South Kent Coast
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RE: 10v or 20v
Another check:
Look at the engine code on the cam belt cover B = Petrol 5 = cylinders 25 = 2.5 ltr 2 = valves per cylinder so B 5 25 2 = 2.5 Ltr 10V B 5 25 4 = 2.5 Ltr 20V B 5 23 4 T = 2.3 Ltr Turbo (T5) |
May 18th, 2002, 17:50 | #7 |
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RE: 10v or 20v
Great! thanks for your help it's a 10v Agent Orange |
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