05-04-2014, 07:31 AM
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#1
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,647
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Quote:
Originally Posted by Gilles
Jeff,
Ok, I spent all morning locating the flange seal, the cam seal plugs and the tool to lock the cams (kindly loaned by BYProdriver)
However, I DO NOT have the center bolt seal, is this seal a special one or can I get away with reusing the old seal along with some Locktite...? (I never heard of the 'green wicking' Locktite)
Another question is for the center bolt, do you simply bolt it in all the way and then use the nut to lock it in place..? Thank you!
Regards,
Gilles
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The factory center bolt has a recess machined into it that carries an O-ring oil seal, which is a common leak point.
Green wicking Loctite is a product designed to prevent oil from walking up threaded shafts and leaking, it is not a thread locker, but a thread seal:
Loctite Green Threadlockers|Thread Wicking of Pre-Assembled Fasteners - Henkel North America
The center bolt is part of the IMS bearing assembly, and in this photo you can also see the O-ring seal:
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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05-04-2014, 08:21 PM
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#2
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,992
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Quote:
Originally Posted by JFP in PA
The factory center bolt has a recess machined into it that carries an O-ring oil seal, which is a common leak point.
Green wicking Loctite is a product designed to prevent oil from walking up threaded shafts and leaking, it is not a thread locker, but a thread seal:
Loctite Green Threadlockers|Thread Wicking of Pre-Assembled Fasteners - Henkel North America
The center bolt is part of the IMS bearing assembly, and in this photo you can also see the O-ring seal:
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Jeff, thank you much for the picture it clearly shows the o-ring for the center bolt, however this O-ring seems to be on the 'engine side' of the bearing, which is a side that I will not have access because my bearing cannot be removed.
On the later engines (the ones you cannot remove the bearing) does the center bolt have the O-ring on the 'transmission side' of the bearing, meaning that I will be able to replace by removing the IMS cover?
If so, would you recommend installing a Viton seal (green color, high temp), since according to the dealer they do not offer a seal for the center bolt (or the center bolt itself) unless you buy the entire cover assembly @ only $140... 
Sorry for asking so many questions... thank you for your support!
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05-05-2014, 02:22 AM
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#3
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,647
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Quote:
Originally Posted by Gilles
Jeff, thank you much for the picture it clearly shows the o-ring for the center bolt, however this O-ring seems to be on the 'engine side' of the bearing, which is a side that I will not have access because my bearing cannot be removed.
On the later engines (the ones you cannot remove the bearing) does the center bolt have the O-ring on the 'transmission side' of the bearing, meaning that I will be able to replace by removing the IMS cover?
If so, would you recommend installing a Viton seal (green color, high temp), since according to the dealer they do not offer a seal for the center bolt (or the center bolt itself) unless you buy the entire cover assembly @ only $140...
Sorry for asking so many questions... thank you for your support!
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All OEM IMS have the O-ring in the transmission side of the bearing, so it will be out in the open when the cover is removed. Viton will be fine.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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05-05-2014, 04:19 AM
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#4
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,992
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Center bolt seal
Quote:
Originally Posted by JFP in PA
All OEM IMS have the O-ring in the transmission side of the bearing, so it will be out in the open when the cover is removed. Viton will be fine.
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JFP,
Thank you for clarifying the location of the seal..!
Regards,
Gilles
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05-08-2014, 11:18 PM
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#5
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,992
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cam position at TDC..?
Sorry but I have more questions...
My car has a BBI underdrive pulley that does not have a timing mark...
and I am trying to lock the crank at TDC.
Can I lock the crank at TDC based on the position of the cams ..?
Somehow I cannot download the picture better go to bed and try again in the morning :-(
Last edited by Gilles; 05-08-2014 at 11:21 PM.
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05-09-2014, 04:57 AM
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#6
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,647
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Quote:
Originally Posted by Gilles
Sorry but I have more questions...
My car has a BBI underdrive pulley that does not have a timing mark...
and I am trying to lock the crank at TDC.
Can I lock the crank at TDC based on the position of the cams ..?
Somehow I cannot download the picture better go to bed and try again in the morning :-(
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The purpose of locking the crank at TDC is to prevent the crank assembly from moving while releasing the cam drives. You should not be attempting this without the pin locking the crank at TDC as locking the cams will not stop the crank from rotating, even if it means temporarily putting the stock pulley back on the engine.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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05-09-2014, 08:25 AM
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#7
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,992
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Quote:
Originally Posted by JFP in PA
The purpose of locking the crank at TDC is to prevent the crank assembly from moving while releasing the cam drives. You should not be attempting this without the pin locking the crank at TDC as locking the cams will not stop the crank from rotating, even if it means temporarily putting the stock pulley back on the engine.
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Hello Jeff,
I am sorry when I posted the message it was way past my bead time... LOL
Yes, I WILL be locking the crank at TDC (at the flywheel side of the engine), the question is can I determine TDC by the position of the cams since my underdrive pulley does not have a mark on it.
Sorry for the crummy picture
Last edited by Gilles; 05-09-2014 at 08:31 AM.
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