I'm loosing count of how many timing belt jobs I've done, just in last 2 years. In 17 years of working on 100 series, I've never replaced cam or cranks seals.
I've seen 1 VVT that is a possible weeper on RH cam seal. But were watch and waiting until next timing belt job. I've one other I suspect, may have seal leaks. It has used HM (high mileage) oil, and now all seals leak. Other than that I never see cam or crank seals leak. More likely to leak if replaced.
What I do see leak and all to often is the tensor idler pulley bolt thread.
Here's one I'm working om now. One would think crank and possible cam seals. But they are dry. The FSM clearly states seal the threads on this bolt. Unfortunately Dealerships and INDY don't read the FSM in most cases, they're concern is with beating book time!
At first glance you'll see grim from oil in circled area. With pulley and crank sprocket on, one would assume crank and cam seals.
Close examination of crank seal shows it is dry.
Here's is actually (oil leak) weeper
I've seen 1 VVT that is a possible weeper on RH cam seal. But were watch and waiting until next timing belt job. I've one other I suspect, may have seal leaks. It has used HM (high mileage) oil, and now all seals leak. Other than that I never see cam or crank seals leak. More likely to leak if replaced.
What I do see leak and all to often is the tensor idler pulley bolt thread.
Here's one I'm working om now. One would think crank and possible cam seals. But they are dry. The FSM clearly states seal the threads on this bolt. Unfortunately Dealerships and INDY don't read the FSM in most cases, they're concern is with beating book time!
At first glance you'll see grim from oil in circled area. With pulley and crank sprocket on, one would assume crank and cam seals.
Close examination of crank seal shows it is dry.
Here's is actually (oil leak) weeper
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