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How to tell? 1 or 2 pc rear main seal?
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Topic: How to tell? 1 or 2 pc rear main seal? (Read 45775 times)
MyOldScottsdale23
Newbie
Posts: 48
Newbie
How to tell? 1 or 2 pc rear main seal?
«
on:
January 15, 2012, 03:02:08 PM »
I have an 85 k-10 305. I have oil pan and pump off how do I tell if it has a 1 or 2 piece rear main seal?
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Blazin
Blazin new trails!
Global Moderator
Senior Member
Posts: 6130
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #1 on:
January 15, 2012, 03:51:46 PM »
The dipstick is on the left side of the engine for a two piece, and the right side of the engine for a one piece seal.
The one piece goes on over the back of the crank shaft to replace it.
The two piece you need to remove the rear main bearing cap to replace it.
«
Last Edit: January 15, 2012, 03:54:53 PM by Blazin
»
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MyOldScottsdale23
Newbie
Posts: 48
Newbie
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #2 on:
January 15, 2012, 09:19:09 PM »
Thanks, not the news I was wanting but thanks!
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Blazin
Blazin new trails!
Global Moderator
Senior Member
Posts: 6130
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #3 on:
January 16, 2012, 06:46:36 AM »
Well I am assuming that the fact it was leaking was not news you wanted to hear either?
Wich do you have? Two piece you can change at the stage your at right now. One piece you would need to remove the transmission.
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Lt.Del
Andy aka:SgtDel
Senior Member
Posts: 3864
DelbridgePhotography.com
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #4 on:
January 16, 2012, 02:45:06 PM »
if you have the pan off, pull the rear main and look at the seal. two halves = two piece. A once piece is one complete circle without breaks.
Blazin is correct about the oil dipstick. My two piece has a driver's side dipstick. Supposedly '86 started the one piece. However, there have been signs that some late '85s had the '86 engine design in them.
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MyOldScottsdale23
Newbie
Posts: 48
Newbie
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #5 on:
January 28, 2012, 01:30:24 PM »
Yes my 85 has the one piece and boy do I wish it would have been leaking a cpl weeks ago when I dropped the trans and rebuilt it. My luck!
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Senck243
Newbie
Posts: 95
How to tell? 1 or 2 pc rear main seal?
«
Reply #6 on:
June 30, 2012, 10:17:44 PM »
My 84 has the dipstick on the passenger side? That's a one piece correct ? 305 also
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1984 k10 305, sm465, np208
Blazin
Blazin new trails!
Global Moderator
Senior Member
Posts: 6130
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #7 on:
July 01, 2012, 09:46:29 AM »
Passengers side is a one piece seal.
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Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs
zieg85
Global Moderator
Senior Member
Posts: 7543
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #8 on:
July 01, 2012, 02:44:33 PM »
Good to know, this thread ought to go in the tech section for future reference...
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Carl
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/
Senck243
Newbie
Posts: 95
How to tell? 1 or 2 pc rear main seal?
«
Reply #9 on:
November 30, 2012, 02:16:08 PM »
Is this a one piece or two piece ? Is it possible someone replaced the pan to a newer pan
Sent from heck
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1984 k10 305, sm465, np208
Senck243
Newbie
Posts: 95
How to tell? 1 or 2 pc rear main seal?
«
Reply #10 on:
November 30, 2012, 04:08:09 PM »
After a bit of research I found out this is a two piece. Dipstick is on the passenger side 84 k10 305
Sent from heck
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1984 k10 305, sm465, np208
bake74
Senior Member
Posts: 5871
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #11 on:
November 30, 2012, 06:56:28 PM »
Have you replaced this yet ? Now I am wondering if it is a 1 PC or a 2 PC ?
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#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
74 k10, 77k10 Tom
Senck243
Newbie
Posts: 95
How to tell? 1 or 2 pc rear main seal?
«
Reply #12 on:
November 30, 2012, 07:28:24 PM »
Not yet but saw on another forum that it is a two piece
Sent from heck
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1984 k10 305, sm465, np208
bake74
Senior Member
Posts: 5871
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #13 on:
November 30, 2012, 07:33:38 PM »
Make sure you reply when you know for sure, I will be watching.
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#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
74 k10, 77k10 Tom
thirsty
Senior Member
Posts: 1289
Re: How to tell? 1 or 2 pc rear main seal?
«
Reply #14 on:
December 01, 2012, 06:09:15 AM »
Measure the flange on the end of the crankshaft. A two piece is larger. I can get you a measurement of a two piece to compare it.
See in this picture. The flexplate in the middle is off a one piece and the flywheel on the right is off a two piece.
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How to tell? 1 or 2 pc rear main seal?