Rear main (crankshaft) seal question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MattPSU · 05-09-2016, 09:54 AM

The 5.3L in my C10 has developed an oil leak that seems to be the rear main seal. I need to swap out the torque converter, so now's the time to change out the rear main seal while I've got it that far apart.

My question is, do you need a tool to align everything or not? I keep seeing videos of people using an alignment tool, but I can't find them for sale/rent anywhere.

Also - should I replace just that seal or should I also replace the rear cover seal too?

Any other suggestions/tips/input?

Thanks - Matt

BR3W CITY · 05-09-2016, 12:40 PM

This is the guy that makes the kits on LS1tech. I don't think you can rent them.

www.saccitycorvette.com

MattPSU · 05-10-2016, 11:12 PM

Quote:

Originally Posted by BR3W CITY

This is the guy that makes the kits on LS1tech. I don't think you can rent them.

www.saccitycorvette.com

Thanks BR3W. Do I need to use a tool? Or can I install it without it?

Matt

ls1nova71 · 05-10-2016, 11:53 PM

As long as you don't take the rear cover off, you won't need the alignment tool. If you do take the rear cover off then the tool is needed to align it up since it has no aligning tabs made onto it. The tool does make it easier to install the new seal though.

MattPSU · 05-13-2016, 11:29 AM

Quote:

Originally Posted by ls1nova71

As long as you don't take the rear cover off, you won't need the alignment tool. If you do take the rear cover off then the tool is needed to align it up since it has no aligning tabs made onto it. The tool does make it easier to install the new seal though.

Thanks! That confirms that I thought. I appreciate it sir!

05-09-2016, 09:54 AM	#1
MattPSU Registered User Join Date: Nov 2011 Location: Lyman, SC Posts: 734	Rear main (crankshaft) seal question The 5.3L in my C10 has developed an oil leak that seems to be the rear main seal. I need to swap out the torque converter, so now's the time to change out the rear main seal while I've got it that far apart. My question is, do you need a tool to align everything or not? I keep seeing videos of people using an alignment tool, but I can't find them for sale/rent anywhere. Also - should I replace just that seal or should I also replace the rear cover seal too? Any other suggestions/tips/input? Thanks - Matt __________________ Matt Criswell - Lyman, SC 1972 Chevy Cheyenne SWB - Build: Porterbuilt State 1 Front & Rear, Bolt in Notch, McGaughys 2.5 Drop Spindles, Boyd Welding Fuel Tank UPSTATE SC GM TRUCK CLUB: FACEBOOK WEBSITE

05-09-2016, 12:40 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Rear main (crankshaft) seal question This is the guy that makes the kits on LS1tech. I don't think you can rent them. www.saccitycorvette.com __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

05-10-2016, 11:53 PM	#4
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: Rear main (crankshaft) seal question As long as you don't take the rear cover off, you won't need the alignment tool. If you do take the rear cover off then the tool is needed to align it up since it has no aligning tabs made onto it. The tool does make it easier to install the new seal though. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html Last edited by ls1nova71; 05-11-2016 at 12:03 AM.



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