Can the front crank seal be replaced without pulling off the timing cover? Every video I have seen does it in conjunction with replacing oil pump or timing chain. This is for my 2005 GMC Sierra with a 5.3. I don't want to pull the cover but if I have to I will change the Oil Pump and chain. Also, If I do change the pump, will I have to drop the pan? Looking for a quick fix since this is my DD.
LS front crank seal replacement
- Thread starter Cajun83HO
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To change the pump you have to lower the pan. Not fully remove, but its gotta come down an inch to remove the pickup tube bolt that goes into the pump.
How many miles does it have? LS oil pumps are semi known for wearing out over time and loosing pressure. My 04 rainier 5.3 has 256K and has been on a steady pressure decline for about 30K miles and I suspect needs a pump.
Basically if you are pulling the balancer and its got over 200K throwing a pump in it isn't a bad idea if you are planning to run it for another 50K or so.
If you have 150Kish I wouldn't pull the cover, you can do it in the truck.
How many miles does it have? LS oil pumps are semi known for wearing out over time and loosing pressure. My 04 rainier 5.3 has 256K and has been on a steady pressure decline for about 30K miles and I suspect needs a pump.
Basically if you are pulling the balancer and its got over 200K throwing a pump in it isn't a bad idea if you are planning to run it for another 50K or so.
If you have 150Kish I wouldn't pull the cover, you can do it in the truck.
210,000 miles. Oil pressure may be getting lower than it used to be. Hard to tell over such a long time. OP is about 35-40 at about 1500 rpms. I'm the original owner and I never plan to get ride of her. Plan to let my son drive it back and forth to college after I buy a friends truck this summer.
So you you believe the seal could be replaced in the truck without removing the front cover? Good to know but I think I will follow your lead and replace the pump too.
Another option, I have a 4.8 that was a pull out of a wreck. Was for a project that i sold. Might swap it for a while that way I can see what the condition of the 4.8 is.
Another option, I have a 4.8 that was a pull out of a wreck. Was for a project that i sold. Might swap it for a while that way I can see what the condition of the 4.8 is.
It's easier to pull the cover for the crank seal, tap out from the cover from behind and use the big socket trick to reseat it. I suppose you could do it on the motor though, don't see any reason not to.
I just did a front seal on the 6.0 while still in my truck, no big deal except for getting the balancer bolt off and back on. (250 ft lbs. really?!)
If you you do pull the cover you will need an alignment tool to center the crank seal properly.
If you you do pull the cover you will need an alignment tool to center the crank seal properly.
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