Timing cover/seal leak - The 1947 - Present Chevrolet & GMC Truck Message Board Network

charlieatthedisco · 08-15-2013, 09:16 PM

Hello all, I have been tacking getting my grandfathers truck ('78 350 c10 Silverado) that has been sitting since '96 running. The good news is I got it running and it runs well. Of course as it starts running again prominent leaks from the old seals have formed. I am planning to change the oil pan/timing cover gaskets and possibly replace the crankshaft seal if that is necessary. Is there a write up for this? I know how to pull off the HB but do I have to take the fan off as well and water pump? I plan on doing this with the engine in the truck. Any pointers or a DIY list would be awesome.

By the way I should mention that the leak at the oilpan/timing cover is once every 20 seconds or so. Pretty bad or I would let it go.
Thanks
Charlie

79Betty · 08-15-2013, 11:45 PM

You will need to replace the crank seal. I'd replace the rear main seal and everything while it's down but that's me. It's not hard and yea u gotta pull the water pump. I did all this in my k10 and it was only a couple hours.
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08-15-2013, 09:16 PM	#1
charlieatthedisco Registered User Join Date: Jul 2013 Location: Santa Rosa, Ca Posts: 42	Timing cover/seal leak Hello all, I have been tacking getting my grandfathers truck ('78 350 c10 Silverado) that has been sitting since '96 running. The good news is I got it running and it runs well. Of course as it starts running again prominent leaks from the old seals have formed. I am planning to change the oil pan/timing cover gaskets and possibly replace the crankshaft seal if that is necessary. Is there a write up for this? I know how to pull off the HB but do I have to take the fan off as well and water pump? I plan on doing this with the engine in the truck. Any pointers or a DIY list would be awesome. By the way I should mention that the leak at the oilpan/timing cover is once every 20 seconds or so. Pretty bad or I would let it go. Thanks Charlie

08-15-2013, 11:45 PM	#2
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Timing cover/seal leak You will need to replace the crank seal. I'd replace the rear main seal and everything while it's down but that's me. It's not hard and yea u gotta pull the water pump. I did all this in my k10 and it was only a couple hours. Posted via Mobile Device __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10



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