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Rear oil seal...silicone or not?

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2wrench

2wrench

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Pic of my real oil seal. Cleaned the hardware; pressed in
the seal per Bently Manual with grease. Wiping, cleaning;
seal pushes either in or out rather easily.

P1010001-24.jpg


This leaves me concerned. I do not want any leaks after
installation or I'll have to pull the engine again, probably.

So, I was thinking of putting a little silicone around the
rear oil gasket. Is this all right? It is not in the
text of the Bently Manual to do so. Will this do more
harm than good?

If yes, will this silicone in the picture suffice?

If no to silicone, does heat make this seal expand and
seal?

Thanks
 
Took another look at this. Removed excess grease.
Very thin amount of grease left in place. Pressed
in the real oil seal. I like it. Won't go with
silicone on the rubber of the rear oil seal,
as it is not mentioned to do so in Bently Manual.

Excessive grease....not good, in my opinion, (slips around).

Very thin amount works, in my opinion.

Tapped it into place with a 1 X 6 using the flat/wide
face on he rubber.
 
That was the proper way, Den. Ya did good. :wink:
 
Anyone try sealing the rear seal with hylomar? Wondering if that might reduce any leakage?

I'm trying hylomar for the first time on everything. That stuff is sticky!
 
Did everyone remember the copper sealing washer on the top center bolt?
 
Paul,
Pure dumb luck on my part. I mentioned on the Mail List or in a Forum that I was doing the rear seal and someone reminded me about the copper washer. I grabbed the baggy labeled Rear Seal Parts....and there was a copper washer. I hadn't even noticed it when I removed the bolt.
RearSealCopperWasher.jpg
 
Yup, got the washer, thanks!

I did use hylomar on the oil seal. *Looks* good anyway!

Any torque specs for those seven rear oil seal bolts?
 
N/M

I was running with spit torque specs.
 
Bobby: Nice pic and great "arrow" indicator, there.
Mine are a little scruffy.

You're looking good. I'm kinda surprised this
thread was revived.
 
I chimed in on it because I didn't want to see you put it back together without the copper washer sealing that center bolt.
 
Anyone know specifically what the torque specs are for seven bolts securing the rear oil seal housing?
 
The TR6 manual says 22 ft.lbs for the rear engine plate.
 
Re: Rear oil Iseal...silicone or not?

Brosky said:
The TR6 manual says 22 ft.lbs for the rear engine plate.
Click to expand...

Sorry, Paul. I think the rear engine plate is a different part.
He's asking about the rear oil seal housing. Now that's my name
or description; but the Bently might call it something else.

What is the size of those seven bolts?
 
MTribe said:
Anyone know specifically what the torque specs are for seven bolts securing the rear oil seal housing?
Click to expand...
z

I'm trying to remember. I think the bolt sizes were dispositive
of what the Bently Manual actually called them. Tell me the bolt
sizes and it might help.
 
Re: Rear oil Iseal...silicone or not?

2W,

Looks like it could be my big mistake.

According to the TRF Blue Book catalog, those are part #HB810:
HDW BOLT,5/16" UNF X 1-1/4" Bolt

I just found that in the TR6 Manual, the Crankshaft Sealing Plate (which is in the front, "aka the saddle block" and is also aluminum) uses 5/16" UNF bolts and they are at 14 ft.lbs.

22ft.lbs. does seem a bit high for aluminum to steel, because nearly all of the other steel to steel 5/16" are at 22.
 
Re: Rear oil Iseal...silicone or not?

Tribe: This is my (our) dilema. This darned part is
referred to in a couple ways: Crankshaft rear oil seal..
(Crankshaft threw my research off); rear oil seal;
and, in the Bently, I narrowed it down to one of two...
sorry, not what you want to hear.

There it is referred to as either a "Crankshaft cover to
block," or

"Crankshaft sealing block attachment."

I will give the specs for each and tell you what I did.
I remember this dilema.

Crankshaft cover to block: 5/16 inch; 15 to 20 lbs torque

Crankshaft sealing block attachment: 5/16 inch; 10 to 14
lbs torque

I concluded it was one of these two; therefore, I split
the baby, slightly fudged and torqued mine at 15 lbs torque.
The seal looked and felt good; not too much, not too
little....

Brosky, whom I greatly respect, has identified these
little devils as being 5/16, so that part fits.

I'd go with 15 pounds and I'm pretty sure that's exactly
what I did.

Whew......

(Disclaimer: I ain't no authority, I just read like the
dickens. Following my suggestions is done at your own
risk.)

Best to ya,
 
Re: Rear oil Iseal...silicone or not?

2W,

It do believe that this is NOT the crankshaft sealing block, because that is in the front, also known as the Saddle Block, so I think that you will be safe with the 15, but maybe you might want to move up closer to the 20. JMHO.
 
Re: Rear oil Iseal...silicone or not?

Okay, Paul. I think you're correct that it is not
the crankshaft sealing block nor the saddle block.

This is nagging me cause 20 pounds just sounds too much.
I have to recant in error both on its title and its
pound torque.

I do believe it is referred to as the: rear oil gallery.

The rear oil gallery seal, per the Bently Manual,
is only torqued to 5 to 8 pounds.

Also, as I mentioned previously that size matters....these bolts, per the Bently, are only 1/8 in in their size...not
5/16.

I repeat as before: The size will be dispositive.
If your bolts are 5/16 that hold that rear oil seal
on, then I apologize and I will hush on this issue.
If, however, they are 1/8 inch, then they are the
referred to rear oil gallery bolts and torque to between
5 to 8 pounds.

I will have to take pics of docs to support my opinion.
 
Re: Rear oil Iseal...silicone or not?

This is important to all of us to get the correct
info. Overly torqued or under torqued, either way,
certainly could cause an undesired leak.

Please read:

001-1-1.jpg
 
Re: Rear oil Iseal...silicone or not?

The last paragraph in pink on the right-hand column reads:

"The rear oil seal housing has one further important
but oft-omitted detail you will be glad you remembered.
The top bolt only must have a copper washer under its
head to prevent oil leaking from the rear oil gallery."

That is an exact quote. I am sorry if it is difficult
to read.

Therefore, we have reference to this part as both a rear
oil seal and in the next breath it describes the special
bolt which must be paid attention to that has the copper
washer which prevents leaking from the rear oil gallery.

So, rear oil seal and rear oil gallery are used as
synonyms...they mean the same thing.

Now I refer you to the Bently repair manual that
refereces torque settings:

0012.jpg
 
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