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Does anyone know if the engine mounts have to be undone for the cambelt to be changed on a 172 cup?
I had my cambelt changed last Friday and now get a harsh knocking noise when the wheels spin up in first and also a vibration when accelerating hard in second.
remove the engine cover.
undo the 4 bolts on the left hand mount
get a bar(big one)
jam it behind the back of the mount and rest it against the strut piller
****mind the AC pipes**** do not rest it against them
push the bar towars the rear of the car (moving the engine forward as far as it will possibly go)
nip all four bolts up nice and tight
remove the engine cover.
undo the 4 bolts on the left hand mount
get a bar(big one)
jam it behind the back of the mount and rest it against the strut piller
****mind the AC pipes**** do not rest it against them
push the bar towars the rear of the car (moving the engine forward as far as it will possibly go)
nip all four bolts up nice and tight
check underneath cus this happened on mine, when the engine had been lifted the cat had snagged on the heat sheild underneath the guy just poked it with a screwdriver and was fine, if nothins catchin then id recommend what ben_p said.
iv done what Ben said to do on my ar and it still knocks do you think i have to replace the engine moutns with new ones and that will sort it cuz maybe the moutn is worn out cheers