Hi there, My sohc engine has a little valve sound, and a friend of mine said to me that they need to be adjusted...

I was just wondering how hard is it to do this ?

I searched google and found a how to adjust valves for a dohc vtec. He used a valve adjusting tool made by honda that has a little screw driver and a socket (all together)...

Does anyone has a how to for a sohc engine ?

 

I've adjusted valves for a Honda SOHC engine before. But I don't remember the exact order in which you should do it. I do know that you should start with the camgear pointing up, and then you adjust the valves that doesn't have the lob pushing down against it. When, you're done with that, you turn the crankshaft to point the camgear to the left. And then adjust the next valves. You basically turn the camgear so that the mark is starting at TDC, then left, then BDC, and then right. But I'm not so sure which valves you adjust first. Hope this helps a lil bit.

 

it has to be done by firing order.
i did it on a d16y5.

 

same as dohc. fiering order is the same, so is the adjustment for the valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onefstek &raquo;</TD></TR><TR><TD CLASS="quote">same as dohc. fiering order is the same, so is the adjustment for the valves. </TD></TR></TABLE>

 

Crank @ TDC, cam gears straight up, adjust #1. Spin crank 180 deg. counter clockwise, adjust #3. Spin crank 180 #4. Spin crank 180 #2.

 

How much torque do I need to put on them ? Do I need to tight them up all the way I can ?

 

once youve loosened the nuts on the valves the screw in top needs to be tightened until the valve barely grabs the valve feeler gauge then you tighten the nut back up repeat until you need to go onto the next cylinder, now i suggest you find a friend with patience to help cause its easier to have someone sit in front of the car and use the feeler gauge and the other to use the screwdriver to tighten the screw until they say when. also one of you can keep getting down in the wheel well to turn the crank pulley 17mm socket just leave the ratchet on it until you finish... oh and make sure no matter what that BEFORE YOU START THE CAR YOU REMOVE THE RATCHET FROM THE CRANK !!!!! hope this helped a bit good luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sc4dr &raquo;</TD></TR><TR><TD CLASS="quote">Crank @ TDC, cam gears straight up, adjust #1. Spin crank 180 deg. counter clockwise, adjust #3. Spin crank 180 #4. Spin crank 180 #2.</TD></TR></TABLE>

I belive that you are trying to say 90* NOT 180*.

 

They dont have to be adjusted in firing order, but each piston has to be at top dead center on the compression stroke.

It is really easy to do a valve adjustment on the SOHC engines with a wrench, a screwdriver, and a set of feeler guages.

As far as torque spec on the nuts, I cant remember them, but the last time I did a valve adjustment, I just tightened them down with my torque-wrist to the same amount as they were when I loosened them.

Really, for a street engine, the only time I use a torque wrench is for head/rod/and mains. Everything else is torque-wrist or German-wrench (Gutentite)

However, and I am totally serious about this, the engine must be cold when doing a valve adjustment. This is a must!

 

Actually, it is 180 degrees cuz the ratio of the crank to the cam is 2:1.

 

I think he thought I was talking about the cam sprockets 180 deg. because when the crank spins 180 degrees, the cams spin 90 degrees.......whatever

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pakipr &raquo;</TD></TR><TR><TD CLASS="quote">I searched google and found a how to adjust valves for a dohc vtec. He used a valve adjusting tool made by honda that has a little screw driver and a socket (all together)...</TD></TR></TABLE>DOHC VTEC engines have the adjustment nuts down in a hole, so they're difficult to reach without the tool. Your SOHC adjusters should be ok with a normal screwdriver & wrench.

One other thing... Honda normally specifies the clearance between the camshaft & follower for DOHC engines. But for their SOHC engines they usually specify the clearance between the follower & the top of the valve stem. Make sure the spec. is clear about where to measure it.