Hi Brian,
Try the competition pushrods from Moss. They are made by Iskenderian and are at
least1/8" shorter than stock. They are also sealed at the ends and won't
collect oil like the spot welded ones. If the pushrods have pressed or
soldered in ends, chuck the rod in a lathe and cut out behind the end with a
parting tool. Cut just deep enough to go thru the tubing wall and take out 1/8"
or so of length. Press in the end down to the cut shoulder. If the end is
soldered, heat it with a torch when pressing.
Good luck,
Pete Fullam
Brian Sanborn wrote:
> Listers,
>
> Hit a big snag and need some serious help.
>
> I'm at a dead stop on the engine rebuild. I got the rocker shaft assembly
> all together so I can set the timing of the cam. You have to use that
> crazy procedure in the workshop manual. I installed the new push rods and
> the rockers..... and big trouble. The camshaft would not move at all
> after tightening down the rocker posts. I found that none of the exhaust
> valves had any play at all.
>
> It turns out that the machine shop guy installed the hardened seats in such
> a way that the top of the valve is now 1/16 inch higher that it use to
> be.... 1/16 higher that the intakes. This takes out ALL of the adjustment
> gap and actually pushes down on the valve a little with the cam in the
> completely closed position.
>
> I called BPNW to see if they had any shorter pushrods... no dice. He did
> have some advice..... his first thing is to complain to the machine shop
> owner..... but the damage is done. He suggest a couple of things.... I
> could grind 1/16 off the top of the exhaust valve stems, and/or grind some
> meat off the bottom of the adjuster end of the rocker to great some play...
> and/or shorten up the exhaust push rods by pulling the head off and cutting
> down the shaft and pressing the head back in.
>
> This has me really bummed. I thought that I was doing the right thing by
> having the valve inserts done. I have taken this week off to reassemble
> the car and now I am stalled. The machine shop guy is on vacation in
> Disneyland with his family and won't be back until Monday the 26th. But
> unless he rips out the exhaust seats and redoes them... if that's
> possible... I'm stuck. I could have my backup head done instead.... but
> that has other problems.
>
> Anybody seen this problem before? Any advice is welcome
>
> Brian Sanborn
> 62 TR4 CT16260L - Groton, MA
> sanborn@net1plus.com
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