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04-15-2007, 11:59 PM | #1 |
Mustang Rookie
Join Date: Apr 2005
Location: Lexington Kentucky
Posts: 98
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Rear Main Seal Advice
I'm building a street/strip 347 from a production 302 roller block with a Coast High Performance kit. I'm thinking the block is a later 5.0 piece, so it should get a 1 piece seal, right? I'm just wondering what brand and material is the rear main seal you guys use or recommend.
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1989 Mustang GT aka Hailey http://www.cardomain.com/ride/822269 |
04-16-2007, 04:30 PM | #2 |
Registered Member
Join Date: Apr 2001
Location: Gallatin, Tn
Posts: 1,326
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Re: Rear Main Seal Advice
Fel-pro and Mr gasket sell both the 2 pieces and 1 pieces just to name a couple.
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04-17-2007, 07:27 AM | #3 |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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Re: Rear Main Seal Advice
If it's a later block, it's gonna be a 1 piece which seals WAY better. It's metal coated in a rubber polymer, typical round seal. Spring goes towards the oil. USMC nailed it, go FelPro or Mr. Gasket. You can get a FelPro at your local Autozone, Advance, etc etc. If you do find out you need a 2 piece, DO NOT put the gaps in line with the block/oil pan flange. Rotate it almost 45* so the seams are up in the block, and down in the oil pan.
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... |
04-17-2007, 11:39 AM | #4 |
Mustang Rookie
Join Date: Apr 2005
Location: Lexington Kentucky
Posts: 98
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Re: Rear Main Seal Advice
I also hear NAPA Teflon rear seals are good, but I think the two you fellers listed sounds like more reputable names. Thanks for the help.
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1989 Mustang GT aka Hailey http://www.cardomain.com/ride/822269 |
04-23-2007, 09:52 AM | #5 |
Registered Member
Join Date: Jun 2001
Location: Lynwood, CA, U.S.A.
Posts: 82
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Re: Rear Main Seal Advice
Did you really mean 45*, Jester? If it is, that's a bit of advice I've been wanting to hear. I've replaced the main seal twice in the last year, and the leak doesn't seem to go away. I don't line up the two pieces witht he flange, but I only offset it between 10*-15*. If that's the case, I may need to go under the car again, because I just did that deal 4 weeks ago, and it seems I have the drip still.
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65 Mustang Coupe...Comp Cams 262 Xtreme Energy, T-5 conversion, Romac Balancer, 620 Front Springs-4.5 Mid-eye rear springs.......work in progress Last edited by sleeperstang; 04-23-2007 at 11:40 PM.. |
04-24-2007, 02:59 PM | #6 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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Re: Rear Main Seal Advice
Everytime someone tells me that their rear main seal is leaking I find a valve cover leak.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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