Crankshaft front seal leak

1979Stang27 · 07-09-2006, 12:28 PM

I have a 79 5.0 mustang that has an oil leak on/near the timing cover. Can anyone tell me how hard it is to fix??? Thanks

84LX89GT · 07-16-2006, 05:40 PM

removing the timing cover is pretty easy, the hardest part is getting off the harmonic balancer bolt which is usually on there pretty tight.
if i remember correctly, you could take off the front cover and EASILY remove the front crank seal. it would also be a good time to replace any other seal/gasket in the area, as well as replace the timing chain.

good luck, it's not that bad of a job. you can even leave the water pump attached to the front cover.

84LX89GT · 07-16-2006, 05:41 PM

oh yeah, also i'd replace the oil pressure sending unit while you're at it. those tend to leak, and once they "go" you'll be driving and suddenly you won't be anymore and you'll be looking to pick up a new engine. I had one go out suddenly on a trip to oregon when i had a 95 jeep wrangler. Now i'm replacing those as a service item on any car I own because being stranded in the middle of nowhere SUCKS!<z>

07-09-2006, 12:28 PM	#1
1979Stang27 Registered Member Join Date: Jul 2006 Posts: 1	Crankshaft front seal leak I have a 79 5.0 mustang that has an oil leak on/near the timing cover. Can anyone tell me how hard it is to fix??? Thanks

07-16-2006, 05:40 PM	#2
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Re: Crankshaft front seal leak removing the timing cover is pretty easy, the hardest part is getting off the harmonic balancer bolt which is usually on there pretty tight. if i remember correctly, you could take off the front cover and EASILY remove the front crank seal. it would also be a good time to replace any other seal/gasket in the area, as well as replace the timing chain. good luck, it's not that bad of a job. you can even leave the water pump attached to the front cover. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

07-16-2006, 05:41 PM	#3
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Re: Crankshaft front seal leak oh yeah, also i'd replace the oil pressure sending unit while you're at it. those tend to leak, and once they "go" you'll be driving and suddenly you won't be anymore and you'll be looking to pick up a new engine. I had one go out suddenly on a trip to oregon when i had a 95 jeep wrangler. Now i'm replacing those as a service item on any car I own because being stranded in the middle of nowhere SUCKS!<z> __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

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