RE: [Chrysler300] Soft Plugs Revisited -- Two Losses

["John L. Chesnutt" <chesnutt@xxxxxxxxxxxx>]

Hi Mike,
You may have a leaky head gasket. I would tighten the head bolts if that is
the problem. I had this problem in our 1957 300C. Twice, I lost a soft plug
in July 1959 on our honeymoon. The first time I was passing a car in
Northern California and the speedometer showed over 115 MPH. The next time
two weeks later I was in second gear passing a long line of cars t in excess
of 75 MPH west of Spokane, Washington. After these two events, I would lose
water from the radiator overflow pipe during warm up before the thermostat
opened. Seven of the eight cylinders were leaking. I had the original type
shim gaskets which I replace with Felpro gaskets. Of course, I have not
driven that fast since.

John Chesnutt, Portland, Oregon

-----Original Message-----
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Michael Reed
Sent: Sunday, May 23, 2010 2:35 AM
To: Chrysler 300 Club Intl.
Subject: [Chrysler300] Soft Plugs Revisited -- Two Losses

On its first drive this year, the "F" popped a soft plug (left head, front)
about 12 miles from town. On it's second drive yesterday, it lost another
(left head, rear). 

This time all 10 soft plugs will be replaced. What I wonder is -- is this a
coincidence? Or not... Two of them in two trips? While it isn't readily
conceivable to me -- could there an inordinate amount of pressure that is
causing them to pop out? 

I'd appreciate any and all thoughts from the membership...

Mike Reed in Lake Odessa, Michigan


[Non-text portions of this message have been removed]



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