Re: 23rd Series 356 Engine Noise

Posted by PackardV8 On 2008/12/12 23:26:45

Standard procedure is to first visualy inspect the springs, measure length. If suspect, then use a spring tester to test the springs.

Both Bob51 and Owen also cite critical issues to address as stated above.

John. There is no reason to replace springs if they are within spec. I'm currently running the factory original set in my 88 Ranger with 174K torturous miles (all driven by ME) which includes 1 episode of overheating. EVERYTHING else in the OHC head had to be replaced except the springs.
I have replaced springs AS NEEDED in probably less than 10% of the engines i've overhauled and then it was only maybe 5 or 6 springs in any one engine. I've never had one come back. ONE exception is EXTREMELY hot running engines such as m/c engines. About 20K miles will max out Chief springs . Sometimes 5 or 6K miles will weaken the springs. the big 2" valves don't help either but the Chief engine is an extreme case.

OHV and OHC engines the springs are rather ez to replace anyway without head removal. Flat heads can be a pain in the ass. I don't know about the Packard streight 8. Can the springs be removed without removing the head???