Oil leak timing cover 3.0

Jmunk

Petty Officer 1st Class
Joined
Jan 31, 2007
Messages
283
I took my boat out today for a run to see if the carb I rebuilt was good to go. After running the boat for 30min I found oil in the bilge. The oil was dripping from the timing cover which had some rust. I did a search and apparently it's common for these to rust out due to leaking circulating pump. Can the timing cover be replaced with the engine in the boat, or does it have to come out ? I don't have a hoist that goes high enough to pull the motor myself, and I would imagine that a marina would charge a good amount to change the cover.
 

Bryan76

Seaman
Joined
Apr 16, 2011
Messages
67
Re: Oil leak timing cover 3.0

Yes on my 4.3 did it in boat pull wpump and balancer off remove hoses out of way and i had to loosen the oil pan to get mine change due to tabs on my cover not a hard job the gasket set is like 5.00 also
 

Fishermark

Vice Admiral
Joined
Oct 19, 2003
Messages
5,617
Re: Oil leak timing cover 3.0

You will be EXTREMELY lucky if the oil pan doesn't leak after trying to change the timing cover without pulling the engine. Try buying a cheap hoist or come along and finding a big tree branch! ;)
 

Jmunk

Petty Officer 1st Class
Joined
Jan 31, 2007
Messages
283
Re: Oil leak timing cover 3.0

I got the mount off and harmonic balancer. The timing cover is shot, looks like the circulating pump was leaking onto it. I'm going to try my luck with changing it without pulling the motor. I'm going to order a new cover and cir water pump and see what happens.
 

Jmunk

Petty Officer 1st Class
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Jan 31, 2007
Messages
283
Re: Oil leak timing cover 3.0

Anyone have a link or picture of the tool to install the harmonic balancer?
 

Fishermark

Vice Admiral
Joined
Oct 19, 2003
Messages
5,617
Re: Oil leak timing cover 3.0

Not to beat a dead horse - but if the timing cover is shot - how does the oil pan snout look? Rusted up too? A lot of work will be done unnecessarily if you end up having to pull then engine anyway. Just sayin....
 

Jmunk

Petty Officer 1st Class
Joined
Jan 31, 2007
Messages
283
Re: Oil leak timing cover 3.0

Got the parts in the mail and got the old cover off which had numerous pin holes in it where it rusted through. After I loosened up all the bolts on the cover before pulling it off the motor I cut the oil pan gasket flush with each side of the block. Oil pan was fine with no rust on it. I put the new timing cover and water pump on. I put a bead of The Right Stuff RTV on the front rail of the oil pan and set the timing cover on. I have cut the oil pan gasket numerous times in the same fashion with cars and never had a problem with RTV when the timing cover gasket kit didn't include the partial gasket. I ran it for 10 min and no leaks. Worst part of the job was reinstalling the harmonic balancer. My crank didn't have any threads in the crank snout, my deadblow hammer did the trick after I heated the pulley up in the oven.

I would do this job the same fashion again without pulling the motor. I myself would tell anyone with room to work to do the same as I did with cutting the oil pan gasket flush with the block before tugging on the old cover. If your oil pan gasket is bad from the get go them you have no choice but to pull the motor. My oil pan gasket was rubber, and my personal experience with rubber oil pan gaskets is they rarely ever fail. I usually keep a can of The Right Stuff, it's the best RTV that I have used and I've been on the same can for about 2 years so, no I don't go crazy with the stuff

I got the timing cover, water pump and gaskets from E Basic Power in NC. Best prices I found for quality pieces. They shipped the timing cover bare metal, I hit it with a coat of black engine enamel paint the night before I installed it.
 
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