Dave
Block casting number should read C5AE-6015E - 298 block; 6029
probably 6C29 is the casting date - March 29 1966.
6C31C is the assembly date - March 31 1966, the C is most likely the
inspector's mark.
True, if the cam gear fails the engine will just shut off with no
harm done to a stock engine. The cam gear in all Mk II engines is a nylon
covered aluminum gear. The nylon will crack, chip then fail at some point.
You might be able to look at the cam gear through the fuel pump block plate
area on the timing cover with a fiber optics scope.
I would change out the timing set to ensure trouble free driving in
the future.
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of david gilmore
Sent: Tuesday, November 20, 2012 8:48 PM
To: tigers@autox.team.net
Subject: [Tigers] 67 MKII timing chain/gear question
My 67 MKII has around 85,000 miles on the original 289 engine which has
never been opened up according to the previous 3 owners. Car runs great
with no issues. My concern and perhaps the concern of other owners is,
should I replace the the timing chain/gears as routine maintenance? A
friend with lots of 289 engine experience said the engine is likely of the
"non-interference" type and not to do a chain/gear change since even if the
fiber cam gear (or
possibly steel gear) breaks no engine damage would occur. (If it works
don't mess with it basically). I would prefer not to change anything if it
is not required. I think some of these engines had fiber gears and others
had steel. I would welcome the educated suggestions of you guys obviously.
Can anyone tell me if my engine has fiber or steel timing gear from the info
listed below? Should I mess with it or just leave it alone? I probably
drive less than a thousand gentle miles
a year. Thanks for the forum and thanks for the input!
engine info:block (under starter) 6029, and under that 0 or a G and
3-AF6015E, build date stamped by water pump on block is 6C31C.
Thank you,
Dave Gilmore
Leawood, Ks
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