Spark Plug Cover Bolt Thread Size Topic is solved

[cn90]

Haha, good joke.

All joking aside, the # of valves is in the VIN:

https://en.wikibooks.org/wiki/Vehicle_I ... /VIN_Codes



B5202S 10Valve
B5252S 10Valve
B5204S 20Valve
B5254S 20Valve
B5204T 20Valve
B5234T 20Valve
B5234T5 20Valve

[erikv11]

Haha, another good joke, i.e. no, not really. The number of valves is not in the VIN, it's not that simple.

The VIN can get you there, because with the VIN you can look up the engine code, and the engine code does include the number of valves.

That wiki link there also doesn't explain how the engine codes work, but it's like this: the number of valves per cylinder is in the fifth position of the engine code, so a VIN 57 car (6th and 7th characters of the VIN) decodes to engine code B5234T, which means

B = Benzene (i.e. gas, not diesel which would be D)
5 = 5 cylinders
23 = 2.3 liters
4 = 4 valves per cylinder
T = turbo

5 cylinders x 4 valves = 20 valves (but by now you just want to read the plastic cover, I know!)

For a North American P80 car, the specific links at Volvo are super convenient for decoding the VIN. For a 97 use http://new.volvocars.com/ownersdocs/199 ... n1997.html and just change the year in the URL for other years (http://new.volvocars.com/ownersdocs/199 ... n1996.html etc.)

[beigg]

it is NOT useless. How else would you know how many valves you've got

We all know it's roughly 19 1/2 valves, unless the parking brake doesn't work. Then it's less!

[m96ag]

it is NOT useless. How else would you know how many valves you've got

I still don't because the cover only says VOLVO on it. At least I can't forget what I'm working on

[98v70dad]

I like it until I have to take it off and put it back on. I've considered leaving it off more than once but I like it even though arguments could be made that its useless. Maybe next time I'll leave it off (but I like it).