If it pings under load with your tuning method you should retard the
ignition until it doesn't. Also check the centrifugal advance mechanism (I
have just put a set of curves on my web site - click 'Spanners' and
'Curves'). If the return springs are stretched, broken or misplaced you
will get maximum advance as far too low an rpm. Also check your vacuum
advance is returning freely.
PaulH.
http://freespace.virgin.net/paul.hunt1/
-----Original Message-----
From: BRUCE PHILLIPS <mgb1964@cois.on.ca>
To: mgs@autox.team.net <mgs@autox.team.net>
Date: 31 March 1999 00:46
Subject: Good Day , Bad Day
>
>To The Learned List
>
> Today was the first day of using the "B" as my daily driver for 2 months.
>Great day ,great weather and disappointment. After a shakedown last night
>on taking the car out of storage I was ready for the day. By the way the
>car is a 64 "B" 3 main engine. After attending the Rotary meeting at lunch
>I went to renew my plates for another year. On the way (2 miles), I heard a
>funny noise from the engine. The noise was like an octane knock and only
>was severe "under load". I got my plates , went back to work and puzzled
>over the noise. I couldn,t take it any more and left work to limp home and
>check things out. I suspected cylinder #3 and low and behold 25 lb's
>compression. Number two 150 lbs. Not going further I decided that the head
>had to come off. I was concerned what I would find ,but 1 1/2 hrs later the
>head is off. Relief is spelled "blown head gasket" between #3 and #4.
>
> I have a spare gasket set so that's not a problem. The motor does not have
>many miles on it and doesn't even have ridges at the top of the cylinders.
>My question is why did it blow ? There is no apparent warping or water
>leaks. Is this something that I replace and hope or is there a common
>cause. The internals and plugs look great. There was no overheating and 60
>lbs. of oil pressure. The one thing that I have done with these engines
>since I can remember is to advance them to the threshold of "ping". What I
>mean here is that the car does "ping" slightly going up hills and under
>load. Could this have caused the problem ?
> Any idea's great fully accepted before I re assemble on Friday.
>
>Thanks in Advance
>Bruce Phillips
>
>64 "B" roadster "headless"
>69 "GT" nearing end of restoration
>77 "B" roadster awaiting restoration
>
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