Iceman

I'm thinking about doing my own valve adjustment this weekend, but the only thing I'm not sure about is how to identify TDC. How exactly should the cam gears look like at this position. My old B -series engine had arrows on the gears which helped. What position (like on a clock) should be "up" arrow be pointed at TDC on the F20?

Also how should the gears look like after rotating the engine 1/4 turn, for adjusting # 2 and #4?

fly_S2K

First, I suggest you have a helms manual handy for this task. Second TDC, is represented when the 2 marks on the cam chain sprocket line up with the cylinder head. If you have the helms manual its on page 6-12. If I had a scanner I would scan the page in for ya, but I don't have one. I'm sure someone else could help ya.

-Johnny

Squeezer

the yellow marks on the cam sprokets will be level with the head and be pointing at each other.

S2KYSK

It doesn't really matter whether you know how to set TDC with cam sprocket. Look at the cam lobes themselves and if both intake and exhaust lobed at pointing up and forming ~90' angle on #1 cylinder thats TDC for #1 cylinder. I have adjusted my valves numerous times using this methodology.

Gernby

If your experience is with B-series heads, you should read this.

S2KYSK, I have adjusted my valves 4 times in the last year, and I am pretty sure the cam lobes will be pointing directly away from each other at TDC for that particular cylinder. I think the situation you describe will be BDC.

jdms2k.

How do you turn the crank, it might be a stupid question but I dont want to do it incorrectly.

I cant seem to find any post that says it.

Thanks.

Soul Coughing

you want your cam lobes to be at the 3 11 oclock position.

I set up TDC with the crank markings and cam gears for cylinder 1, do my adjusting, then rotate them to get to number 3 cylinder, then 4th, then 2nd...

What i have done recently, is i can do some exhaust and some intake on different cylinder when at TDC for number 1 cyclinder etc... It cuts down on the time it takes... for me at least!

chino101

Great article on adjusting valves on the S2000 and Prelude.

http://www.s2000.org/articles/valve_adjustment/

jdms2k.

I see what they are saying.

Im saying how do you crank the motor? By hand? or by the hex key? or by what?

Thanks.

chino101

The motor can be cranked by hand using a 19mm socket and ratchet.

Be sure to rotate in the correct direction (clockwise on the S2K I believe); rotating the engine in reverse can cause the timing belt/chain to skip teeth (heard this on NPR's Car Talk)

Remove the stock air box to gain access to the 19 mm crank bolt
Remove the spark plugs to make it easier to turn

And get the Honda S2000 factory shop manual

Good Luck !!!!1