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Rear Main write-up

LEB Ben

LEB Ben

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Anybody have a link or write-up to rear main seal replacement write-up for a 351M/400? Thanks.
 
smokey

smokey

Hitech hillbilly
Staff member
13,257
706
Garrett Co. Maryland
Chiltons/haynes instructions below.
1. remove oil pan
2. replace remain seal
reinstall oilpan

How I changed mine
Remove oilpan. You may have to loosen motor mounts and lift motor for oil pan to be removed.
remove rear cap tap out rear main seal( they actually make a puller for this but it isn't needed.)
replace bearing cap and re tighten to specs
install new pan gasket
tighten oil pan gasket to spec
re tighten motor mounts if engine was lifted.
Should be able to replace a rear main in these motors in about one hour if you don't rush it.
 
LEB Ben

LEB Ben

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Thanks fellas. That's the main reason I was asking, because some guys say you need to remove the engine, others don't...some guys say it's alot more complicated than others. But Randy's way is what I was planning on doing.


Thanks.
 
TexasRho83

TexasRho83

2,652
141
Carrollton, TX
I don't mess with rear main seals unless I absolutely have to... a few drops of oil don't bother me - keeps the rust away haha
 
LEB Ben

LEB Ben

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TexasRho83 said:
I don't mess with rear main seals unless I absolutely have to... a few drops of oil don't bother me - keeps the rust away haha
Click to expand...

Yeah a few drops don't bother me either, but when it turns into a 4-6" diameter puddle over night, then it starts to bug a guy.

Truckin4life said:
I know you have to pull the motor in my truck, dont no d*ick for Sh*t when it comes to gen 6's tough... :D
Click to expand...

HAHAHAAHAH...Don quick question, can't you just remove the cross member to drop the pan?
 
Truckin4life

Truckin4life

Texas Chapter Leader
9,037
287
San Antonio, Texas
I can actually pull the lower intake off to drop the pan enough to get it done, but once your that far, its motor mounts left so its easier to pull the engine and have it on a stand, as for the cross member, i dont belive so...
 
smokey

smokey

Hitech hillbilly
Staff member
13,257
706
Garrett Co. Maryland
If this is on the 77 or 79 the engine stays in.
I have replaced more than a few with out much trouble at all on the older ones.
Newer stuff I agree easier to pull the engine.
 
hollenjoe

hollenjoe

97
9
Its hard to do, but you defenitively can do it without lifting the engine, i have removed a couple of oilpans without doing so...
 
LEB Ben

LEB Ben

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Thanks for the input fellas. You're all a good confidence boost...except for Don.
 
Truckin4life

Truckin4life

Texas Chapter Leader
9,037
287
San Antonio, Texas
Im speaking from experience on my truck, rides today you have to have a masters in thinking like china men do...

Your truck, simple knowledge can get you very far...
 
LEB Ben

LEB Ben

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Truckin4life said:
Im speaking from experience on my truck, rides today you have to have a masters in thinking like china men do...

Your truck, simple knowledge can get you very far...
Click to expand...


China-Man thinking FTMFL. FYI, I was just busting you lady balls.
 
Truckin4life

Truckin4life

Texas Chapter Leader
9,037
287
San Antonio, Texas
Lady Balls FTMFL!!!!!!!!!!!
But i guess havin lady balls is better than havin athumb sized deck...
Thread cross referencing FTMFW!

(am i learning good jedi master?)
 
LEB Ben

LEB Ben

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I just swelled up with pride Don. You may have what it takes after all.
 
LEB Ben

LEB Ben

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