 Old Mechanic's Trick???, Packing main seals with grease |
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| BMartin914 |
 Aug 31 2005, 12:53 PM
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#1
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|||  Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest  |
Does anyone pack their main (front, rear, etc.) seals with grease to help with the sealing process?
I have gotten conflicting opinions on whether or not to pack the cavity of seals with a high temperature grease before installing. Does this help? Is it unnecessary? Just looking for some opinions. TIA. |
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| MartyYeoman |
Aug 31 2005, 12:59 PM
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#2
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Senior Member Group: Members Posts: 1,525 Joined: 19-June 03 From: San Ramon, CA Member No.: 839 Region Association: Northern California 
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A good coat of 140 weight gear oil works good for me.
Some rubbers do not like grease. They react (swell) over time. Gear oil can't do any harm. |
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| Sammy |
Aug 31 2005, 01:01 PM
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#3
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. Group: Members Posts: 1,190 Joined: 21-January 03 From: Orange, Ca Member No.: 178 |
Yes. Do it. Not really a pack, but a wipe should be enough.
Seals don't like to run dry. The lips burn and the shaft gets scarred if they run dry. Then they leak. The only exception to this is if you have a neoprene or natural rubber seal designed to seal water. They don't like grease. |
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| BMartin914 |
Aug 31 2005, 01:17 PM
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#4
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||| Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest |
I ask because I recently installed a front main seal and coated the outside surface (toward impeller hub) and inside surface (that contacts the hub) with grease for help on startup. I have since been told that I should have literally filled the backside cavity with grease. It supposedly expands as the engine heats, thus providing a better seal.
I for one do not think it is necessary, but thought I'd see what others had done in the past. |
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| phantom914 |
Aug 31 2005, 01:19 PM
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#5
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non-914-owner non-club member Group: Benefactors Posts: 1,013 Joined: 24-February 04 From: Covina,CA(North ofWest Covina) Member No.: 1,708  |
The grease will just ooze out when it heats, it won't help seal. Just grease the part that contacts the shaft. As the grease wears off, engine oil will provide the lubrication. The grease is for break-in. Trust Sammy. They named a seal after him. Andrew |
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| Allan |
Aug 31 2005, 03:44 PM
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#6
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Lubed mine up with gear oil. No leaky...
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| Gint |
Aug 31 2005, 09:47 PM
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#7
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Mike Ginter Group: Admin Posts: 16,093 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
You absolutely want to lube every oil seal. I can't speak to grease vs. oil, and I don't knwo that it would make a whole lot ofdifference anyway, but lube them for sure so that they don't scar the sealing surface on startup. Sammy knows best.
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