LS Rear Main Seal Replacement (4.8L 5.3L 5.7L 6.0L 6.2L 7.0L)

[@Boosted370]

You don't need that tool for the rear main. I install seal into the cover loosely, install cover with bolts then press it on by hand then torque the bolts down. No leaks and I'm pushing close to 800whp in my 91 z28

[@3rdGenGuy]

it's fun and games until you do a 30min track session and a misaligned seal goes BY BY. 1/4 mile pulls and burnouts don't put an engine under nearly as much stress as running all-out for 30min.

[@RejectReality97]

​@@3rdGenGuyWhen did he say he doesn't track the car 😂 assume much

[@notchbackgta]

@@Boosted370 exactly. Thank you

[@MillenialWhiteGuy]

cant wait to see how you do the pvc system

[@Nestos209]

Ppl commenting “tool is not necessary”. You know what else is not necessary? Cheaping out on a $15-20 tool for a 4-7 hour job.

[@joaoescudo1561]

What do you torque it to?

[@3rdGenGuy]

the m8 bolts are 18lb-ft about 8lbft for the m6 long bolts.

[@joaoescudo1561]

@@3rdGenGuy thanks

[@BeansAndHermie]

Great video ... did you do this just to show us you have a tsp cam ;)

[@QNMSyclone]

Amazing!!

[@Reefyeigt]

What’s the new insta ?

[@3rdGenGuy]

not new, but @3rdgenguy

[@doolallyproductions7234]

You have a LS1? I thought you had a LS3

[@3rdGenGuy]

I wish ha ha 100hp difference between those forsure

[@dipitmexico4456]

hi, where I can buy that aligment tool?

[@3rdGenGuy]

they sell em on their website, but they also sell em on amazon. USA product www.saccitycorvette.com/AlignItTools.html

[@larryw5429]

Wasn't this a rebuilt engine?

[@MillenialWhiteGuy]

he was pretty sure with the way his pvc system was set up that it was causing to much crankcase pressure and it blew his seal out.

[@3rdGenGuy]

junkyard LS1 with questionable miles. my PCV routing was wrong so I think crankcase pressure was getting way to high.

[@droneflyer3231]

i didn't see u thighing the 2 long oil pan bolts

[@3rdGenGuy]

torque them after the cover bolts are torqued.

[@HypocriticYT]

Can a bad OVC valve make a new main seal plate leak? This is what I’m being told 😮seems far fetched

[@3rdGenGuy]

crankcase pressure can make a main seal leak.

[@jasondearduff8274]

It's going to leak again. The problem is the trust surface on ls engines is weak and this is what causes this leak

[@3rdGenGuy]

never heard a soul ever mention the crank thrust spec for causing a leak

[@kennydemartini2169]

@@3rdGenGuy Never heard of it either, and I've been doing this for forty years. The thrust bearing would almost have to be missing for the crank to walk that far. I've seen Windsor Fords and big block Chrysler's eat thrust bearings and journals.

[@halfspecgarage9169]

Use a sharpy and tool isn’t needed

[@3rdGenGuy]

why risk a job that takes 4-6 hours to do? tool guarantees the main seal will last and not leak.

[@notchbackgta]

The tool really isn't necessary

[@3rdGenGuy]

I talked to an engine builder that probably builds 10x LS 427s a week, and he said that tool is ABSOLUTKLY necessary. although the OEM tool is steel.

[@notchbackgta]

@@3rdGenGuy you install the seal before putting on the engine, the seal self centers on the crank. It's really not necessary at all

[@3rdGenGuy]

well no, the OEM GM repair guide is the method I used.

[@kennydemartini2169]

@@notchbackgta torquing the rear cover can cause the plate to move off center. Torquing the cover before the two pan bolts can cause it to be off center. The alignment tool is a must!

[@notchbackgta]

@@kennydemartini2169 no, it's not 🤦

[@hectormenchaca1253]

Part number for the seal kit please thanks

[@3rdGenGuy]

it's shown at 0:59