Re: 23rd Series 356 Engine Noise

Posted by JD in KC On 2008/12/12 0:42:46

The saga ends.

First, thanks to O_D and PackardV8 for your input. It is really appreciated and it's now in my notebook for use when I tackle the '41 without benefit of a mechanic.

The problem was partly mine in being "penny wise but pound foolish". I went into this with only the goal of fixing the dreaded super loud TICK TICK TICK noise. I was very hesitant to replace any parts that didn't 'need' replacing because of budgetary concerns. As a result, old valve springs were put on new valves. This was the cause of all the problems. Using the old springs on the new valves caused them to hang open. I feel kinda foolish admitting we did anything as dumb as re-using the old springs but if it prevents anybody else from attempting the same thing then feeling foolish is ok.

Today we replaced all remaining old valves with shiny new ones, re-checked to ensure that the clearance on all valves was exactly the same and measured with the pistons at TDC. Installed 16 new springs and valve keepers designed for use with the new valves. Disassembled and cleaned all the hydraulic lifters one at a time as described in the manual. Basically, we did what O_D recommended and did a complete, proper valve job.

After we put the head back on for the 4th time... I sent a small prayer heavenward and stepped on the gas. The engine caught after one rotation and after the lifters pumped up it ran as smoothly as whipped butter.

All's well that ends well.