ap1 engine or ap2 ?
#21
Probably due to some abuse.. Mine has 119k miles and 240+ psi across all 4 cylinders.. Just make sure you never give it more than a 1/4 throttle untill its warmed up fully and you keep up with the maintenance next time. Check all the retainers too before you drop in the next one if you decide to go with an f20.
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