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For LS engines utilize front and rear seals with Teflon inner sealing lips. For proper seal function and longevity it is critical that the seals be aligned perfectly concentric to the front diameter on the balancer hub and rear sealing surface on.
Essential & ideal tools for engine builders & mechanic.
Pay Attention To: For the LS engine, the oil pan is a stressed member and adds to block rigidity. So it can't simply be slapped in place; along with the front and rear engine covers, it must be carefully aligned with the block.
For LS Oil Pan Alignment Tool with Mounting Screws
For LS Rear Main Seal Cover Alignment Tool
For LS Front Cover Alignment Tool
How to install the Front Cover (No seal installed in the Front cover):
David M Roberts
2025-09-05 10:25:27
I bought this tool set to set the front and rear covers on my 5.3 LS build. It was easy to use and centered the covers for proper installation. The pieces of this set are solidly made and should provide years of service.
Joseph
2025-08-15 16:39:45
Works great lining up oil pump so you don’t have leaks it’s a must. Keeps oil pan square to trans and front cover. Made well would recommend
Ty
2025-08-03 09:04:30
Made it fit great and squared it up well glad to have em
Customer
2025-07-12 16:50:06
Can’t believe they can sell this for the price. Well built from billet aluminum. Easy to use.
Sean
2025-05-30 10:29:55
The tools are nice. I have been build ls engines for years and wanted to try a metal set like these. I have the plastic ones and they are starting to show the use. These are a lot nicer when driving the seals in. I love the metal, very firm. But the oil pan jig works on the front of the engine only, need one that works on rear.
David Lindelien
2025-04-30 17:22:17
Used this while doing a cam on my 2012 sierra. I've driven it over 25k miles since and no leaks so far. Highly recommend
John
2025-04-12 13:41:41
I was unsure if this was really something that I needed until I used. This tool made installing my rear main seal a breeze. I used it to line up the rear cover first. Then I used it as a seal driver for the rear seal. I put a 2x2 on the seal installer and with one smack of the dead blow hammer, the seal was done.
william coiner
2025-04-06 14:01:19
did the job its intended for
Jim
2025-02-16 12:05:52
Used it to install the rear seal and worked very well. Don't pop out the plastic insert. It's used to align the seal. Put it (the seal) over the end of the crank and put your fingers at 10, 2, 4 and 8 o'clock and push the seal in. Use the tool to tap the seal in until it bottoms out. (service manual indicates the seal should be tapped in until it bottoms out).
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