Checking timing belt tension, hm....
Posted: Wed Nov 16, 2022 10:26 am
Previously on Chris' 928S we had a case where the timing belt tension light popped when letting off the gas at redline in third a month or two ago. Drove car home, things appeared OK, no more light. Needed to check tension on the 70k mile belt. (pump and belt replaced at 70k, 140k now, last retensioned 2 years ago)
Yesterday while driving and revving it up in first I saw the light come on again. Not a good sign, drove 1 mile home and parked. This morning at about 40f temps outside and a cold engine I took the timing cover off and did a check on the tension.
It looks about where it should be. Pointer varies between the center of the window and on the front edge of the window based on how I hold it against the timing belt cover wall, but it doesn't appear to be too slack. Would like to verify I'm measuring it right.
(Yes, #1 cam is at TDC mark along with the resonator/front of engine. Oddly enough though it does seem to be one tooth off when engine mark is at 0. This is not unusual (been like that before), but odd)
Yesterday while driving and revving it up in first I saw the light come on again. Not a good sign, drove 1 mile home and parked. This morning at about 40f temps outside and a cold engine I took the timing cover off and did a check on the tension.
It looks about where it should be. Pointer varies between the center of the window and on the front edge of the window based on how I hold it against the timing belt cover wall, but it doesn't appear to be too slack. Would like to verify I'm measuring it right.
(Yes, #1 cam is at TDC mark along with the resonator/front of engine. Oddly enough though it does seem to be one tooth off when engine mark is at 0. This is not unusual (been like that before), but odd)