Question for the hnoda guys. I have a 89 si and I have oil in the spark plug tubes. I have replaced the rubber on the valve cover it steal leaks. I'm sure there is seals under the rocker arms. I was wondering is it a pain in the a^% to change them?

 

Need to change the 4 rubber rings also, if you didn't.

 

I know I have changed those and it steal leaks.

 

Make sure you're not overtightening the valve cover fasteners or the seals will get deformed and not seal properly. That's the only place you can leak oil from into the plug tubes, so you need to figure out why they aren't sealing. Nothing else under the valve cover matters at all, you can't get oil in the plug tubes if the plug tube seals are doing their job properly.

 

not exactly if the o-rings (seals) under the rocker arms goes bad an oil leak can seap through. How difficult it is to replace its? not that bad. just remove your valve cover, put the motor in TDC (top dead center), lossen the bolts holding the rockers (set them aside), replace oring, reverse order going back in. just make sure you torque the bolts with the proper torque spec and don't forget to do valve lash (adjustment). also consider that your car is old the orings under the rocker arms might be or staring to deteorate.

 

How does that make oil magically appear outside the valve cover in the plug tubes? You'd still need the tube seals to go bad in order for that to happen, because that's the only way outside in that area..

Nevermind, I forgot the extra set of O-rings. That's what I get for never touching a D series with a 10 foot pole. Which engines have the extra set of seals? I know the D15, and some of the Accord engines do, none of the B series do from what I remember..

 

yup, to answer your question imagine that the spark plug hole is made up of two halfs. one half of it is part of the rockerarm and the other part is the head inbetween is the rocker arm seals. this explain the seaping or leaking that i was talking about. not being an ass but pointing out my point.

 

Is that single cam only for the extra set of seals? I don't remember DOHC having an extra set, but it's been a long time.

 

Could I getaway with just taking off one rocker arm and leaving the timingbelt on and just replace that one seal.