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January 12, 2005
Hello all:
This Question is about my '68 Sprite "Rosa" - 1275cc
Is it possible that the timing chain jumps a teeth on any of the
sprockets when it gets worn?
I have my engine out of the car for an unrelated issue (replaced the
starter ring gear =96 different story) and noticed that the notch
in
the crankshaft pulley is about 15 deg past the TDC mark when the nr.
1 piston is at TDC. I checked the posiiton of the nr. 1 piston
visualy through the spark hole, and by using a wire and am quite sure
about this mis-indication.
The inlet valve for nr.1 cylinder (2nd valve from the front) opens at
about 6-7 deg BTDC =96 based on the observed TDC of the piston.
According to Haynes that should be 5 deg TDC.
The engine ran reasonably well before I took it out, only getting a
bit hot when climbing hills.
I guess I could find the answer by taking off the big
1-1/2"pulley
bolt and the timing cover and see for myself. However I prefer not to
do that right now, as I understand it takes quite some violence to
get the nut off (+new gaskets etc.) and another car needs to be fixed
first, so the Sprite needs to move.
Any thoughts or similar experience? Could I just mark the
"new"TDC on
the pulley and set the spark timing using that mark till I have time
to replace the chain? Or is that asking for trouble..?
Thanks much for your input.
Stephan =96 San Francisco
"legalalien97" < legalalien97@... > 35692
Posted on January 12, 2005 06:00 AM
Posted to category(s) Cooling System | Cylinder Head | Drive Train | Electrical System | Engine (external) | Engine (internal) | Ignition System | Interior | Lubrication System | Miscellaneous | Technical Info | Tuning
