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Old 06-30-2019, 07:11 PM   #1
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Default 5.7 oil leak

1996 mercruiser 5.7.
Had new engine installed 2 years ago. Just the block, reused intake, heads etc
I have an oil leak what appears to possibly be by the harmonic balancer. Tough to tell since the belts are slinging the oil around.
Loosing about half a quart on half day trip so pretty good leak and want to take care of it.
Of course shop who did the engine replacement keeps blowing me off regardless of how hard I push back.
Question is this.
Can the harmonic balancer be pulled with engine in boat? Don’t have a lot of room in front of the pulley.
I read a dab of RTV on harmonic balancer woodruff key is often the leak.
Any advice on pinning down the location of leak or common areas to check appreciate.
I don’t think it’s the timing chain cover but haven’t ruled that out yet.
Mark
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Old 06-30-2019, 09:00 PM   #2
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Yes the balancer can be pulled without removing the engine and the front crank seal prayed out of the timing chain cove and replaced, however with that much oil leaking I would look at the front oil pan seal. Unfortunately the engine needs to come out to replace that
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Old 07-01-2019, 04:27 AM   #3
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Does not look like there is enough room to pull the balancer off as you will need room for the puller.
Don
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Old 07-01-2019, 11:54 AM   #4
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Quote:
Originally Posted by donald View Post
Does not look like there is enough room to pull the balancer off as you will need room for the puller.
Don
I think it can be done but will be tight. Remember the crank pulley has to come off the the puller bolts directly to the damper. He may need to remove the puller before being able to slide the damper out. The harder part is trying to replace the crank seal.
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