It was interesting to hear that even if the timing belt is a bit loose, the car will still run (poorly?) at higher RPMs. Enjoy the continued maintenance of the red car!
Yes, the belt is under the most load on startup. If it survives that event, it doesn't typically break at high RPMs. Any change in velocity (acceleration) will load or unload the belt though so driving style plays into how long these last. Things to look for are any missing teeth on the belt. This belt is double sided so the chances that a tooth gets broken off due to fatigue are high. Therefore, they recommend replacement every 30000 miles. I've driven it about 60+k miles, so its definitely getting to be time!
Found the Following Parts: DAYCO Part # 95293 Interference Engine / Effective Length 41.26" / Top Width 0.71" / Number of Teeth 110 Balance Shaft Belt; Interference Engine $26.79
DAYCO Part # 95107 Effective Length 43.86" / Top Width 0.75" / Number of Teeth 117 Engine Timing Belt (Only 10 Remaining) Water Pump Driven by Timing Belt, Interference Engine $9.04
Yes Virginia,belts do break at high RPM. I have done this and it was not fun. Do not take the maintenance on these belts lightly. As it was mentioned this is an interference engine and it is costly to replace valves and other goodies when the belt(s), breaks. The balance shaft belt can break and cause the camshaft belt to malfunction. I change the belts at minimum every two years. My 1987 924S (second one)has 70,000 original miles. If you're driving easy and in moderate weather start thinking about changing them at 30K. If you think about it all the time,change them!
It was interesting to hear that even if the timing belt is a bit loose, the car will still run (poorly?) at higher RPMs. Enjoy the continued maintenance of the red car!
ReplyDeleteYes, the belt is under the most load on startup. If it survives that event, it doesn't typically break at high RPMs. Any change in velocity (acceleration) will load or unload the belt though so driving style plays into how long these last. Things to look for are any missing teeth on the belt. This belt is double sided so the chances that a tooth gets broken off due to fatigue are high. Therefore, they recommend replacement every 30000 miles. I've driven it about 60+k miles, so its definitely getting to be time!
ReplyDeleteFound the Following Parts:
ReplyDeleteDAYCO Part # 95293 Interference Engine / Effective Length 41.26" / Top Width 0.71" / Number of Teeth 110
Balance Shaft Belt; Interference Engine
$26.79
DAYCO Part # 95107 Effective Length 43.86" / Top Width 0.75" / Number of Teeth 117 Engine Timing Belt (Only 10 Remaining)
Water Pump Driven by Timing Belt, Interference Engine
$9.04
Yes Virginia,belts do break at high RPM. I have done this and it was not fun. Do not take the maintenance on these belts lightly. As it was mentioned this is an interference engine and it is costly to replace valves and other goodies when the belt(s), breaks. The balance shaft belt can break and cause the camshaft belt to malfunction. I change the belts at minimum every two years. My 1987 924S (second one)has 70,000 original miles. If you're driving easy and in moderate weather start thinking about changing them at 30K. If you think about it all the time,change them!
ReplyDelete