Rear Main Seal OEM or Felpro

diezelraccoon said:

Would this tool work?

https://www.amazon.com/Rear-Cover-Alignment-Installer-Engines/dp/B096SCC23W/ref=asc_df_B096SCC23W/?tag=hyprod-20&linkCode=df0&hvadid=692875362841&hvpos=&hvnetw=g&hvrand=16953590016547390382&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9027054&hvtargid=pla-2281435180778&psc=1&mcid=e16be472489d3af48cb1b4a06d21b0fc&hvocijid=16953590016547390382-B096SCC23W-&hvexpln=73

Click to expand...

strutaeng said:

Yes. Or you could get this which has both rear and front and the oil pan alignment bar, in case you ever have to do those.

LS Rear Main Seal Alignment Tool,Front Cover Alignment Tools & Oil Pan Front Cover Alignment Tool Kit for GM LS Engine 4.8 5.3 5.7 6.0 LS1 LS2 LS3 LS6 L99 LS4 LS9 LSA LQ4 LQ9 L76 L92 https://a.co/d/f4aKZpM

Click to expand...

diezelraccoon said:

Oil pan alignment bar? I’ve thought of replacing the oil pan seal while doing this but you have to align the oil pan?

Click to expand...

strutaeng said:

If you ever rebuild an engine on the engine stand, to align the front main cover, that's when you use that alignment bar (oil pan hasn't been installed yet.) And there's a similar aluminum machined piece that centers the front cover, similar to the rear.

So to only replace the oil pan, no, you don't need that bar.

There's a PDF floating around on the specifications on rebuilding these engines, so you can see the process. Let me find the link and I'll post it here later...

Edit: Here you go:

https://www.performancetrucks.net/f...652081-07-2500hd-classic-build-6.0-manual.pdf

It's for a 6.0, but really doesn't matter on procedures. Could be 4.8, 5.3, 6.0, 6.2.

Click to expand...

diezelraccoon said:

For the rear main seal and gasket, would you recommend OEM or Felpro? I’m seeing a lot of folks use Felpro and say it’s better.

Click to expand...

diezelraccoon said:

For the rear main seal and gasket, would you recommend OEM or Felpro? I’m seeing a lot of folks use Felpro and say it’s better.

Click to expand...

frank1 said:

That's like asking if one prefers blonde over red heads. I use both, whatever is available.

Click to expand...

diezelraccoon said:

For my 03 Tahoe 2wd with the 5.3 I’m a bit conflicted on what brand I should get for the rear main seal and retainer gasket. I tend to want to stick OEM especially in a job this big but others are telling me Felpro brand is just as good if not better. I’ve got a local parts place here selling both for $42.99.

What do y’all recommend?

Click to expand...

bluenova1971 said:

Have you tried Blue Devil Rear Main Sealer? Worked for me.

Click to expand...

diezelraccoon said:

For my 03 Tahoe 2wd with the 5.3 I’m a bit conflicted on what brand I should get for the rear main seal and retainer gasket. I tend to want to stick OEM especially in a job this big but others are telling me Felpro brand is just as good if not better. I’ve got a local parts place here selling both for $42.99.

What do y’all recommend?

Click to expand...