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The better Viton Distributor O-ring by fierosound
Started on: 04-28-2013 10:47 AM
Replies: 6 (2336 views)
Last post by: dremu on 01-19-2021 02:03 PM
fierosound
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Report this Post04-28-2013 10:47 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
We know the distributor O-ring is a bad source of leaks as they harden with age and crack.
Unfortunately, when you ask for a Fiero distributor O-ring, you get the same crap Buna-N black O-ring.



What you want is the better tan colored Viton O-ring which stands up to engine heat better.
The problem is the parts guy can't find the thing "for the Fiero".

Later year V6 engines with DIS systems didn't have a distributor, but they still had a geared drive
in the distributor's place to drive the oil pump. These later applications have the Viton O-ring available.

What you need to ask for the the O-ring for the Oil Pump Drive Gear.
Sometimes they call it a Seal and maybe Oil Pump Gasket (see example)

This example is for a 2004 Grand AM with the 3.4L (3400) engine.

ACDELCO Part # 10477565 http://www.rockauto.com/cat...426698,parttype,5444

Fel-Pro Part # 704841 http://www.napaonline.com/C...FPG704841_0147537476

NAPA's Part # is 655-1294. http://www.napaonline.com/C...DP6551294_0374155317

I think you may find them in "Help" packages as well.
Dorman PN 90441 - Distributor O-Ring Assortment

For "insurance" I also use a Felpro distributor base gasket (thanks for the pic Schurkey)



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[This message has been edited by fierosound (edited 04-09-2022).]

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Report this Post04-28-2013 12:43 PM Click Here to See the Profile for hnthompsSend a Private Message to hnthompsEdit/Delete MessageReply w/QuoteDirect Link to This Post
Rodney Dickman also sells an improved distributor o ring. Once I replaced the factory o ring with Rdney's upgraded replacement, no more oil leakage at that location. This has been running for several years now so there is some long term experience.

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css9450
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Report this Post04-28-2013 06:55 PM Click Here to See the Profile for css9450Send a Private Message to css9450Edit/Delete MessageReply w/QuoteDirect Link to This Post
Cool picture. I've had to replace a couple of those back when I had my Beretta - that little stub is tough to get a grip on and pull out! At least with a distributor, there's a big metal piece to grab...
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eti engineer
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Report this Post11-11-2020 08:59 AM Click Here to See the Profile for eti engineerSend a Private Message to eti engineerEdit/Delete MessageReply w/QuoteDirect Link to This Post
Thanks, Fierosound. I never even thought about this but now I can fix it. I wish this was the only leak I have, but both valve cover gaskets are shot, and some of the hoses connected to the intake manifold are shot. I figured that since I am retired and need a winter project, why not pull the whole thing. Now I am looking into doing a mild build if such parts are available for the 2.8. If not, I will look into replacing the 2.8 with something that has a few more horses. Any recommendations are welcome. I am quite adept at car mods. I put a 280Z engine in a 530i. It wasn't bad at all.

If you or others suggest that maybe I should just swap out the engine and drop another larger one in the cradle, please do so and supply any info/hidden problems that can help me. Thanks...
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eti engineer
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Report this Post11-11-2020 09:01 AM Click Here to See the Profile for eti engineerSend a Private Message to eti engineerEdit/Delete MessageReply w/QuoteDirect Link to This Post

eti engineer

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Fierosound, BTW, I like the idea of the felt ring as insurance. Good idea!!!
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donuteater306
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Report this Post01-14-2021 11:28 PM Click Here to See the Profile for donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Looks like I'll be pulling my dist. out again to replace with better ring. lol.

One year ago, 02/2020, I replaced my dist. with a Delco reman. Came with the standard black ring. Last week, 3,200 miles later...oil leaking everywhere. Only replacement I could find was another black ring. ya, I'm not doing this again next year
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dremu
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Report this Post01-19-2021 02:03 PM Click Here to See the Profile for dremuSend a Private Message to dremuEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by donuteater306:

Looks like I'll be pulling my dist. out again to replace with better ring. lol.

One year ago, 02/2020, I replaced my dist. with a Delco reman. Came with the standard black ring. Last week, 3,200 miles later...oil leaking everywhere. Only replacement I could find was another black ring. ya, I'm not doing this again next year


As noted, *also* do the paper gasket under the dizzy. Besides a little extra sealing protection, IMO it shims the dizzy against the drive.

-- A
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