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Old 09-23-2011, 02:13 PM   #1
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Default De-turboing the car - oil return plug size

Greetings. I'm de-turboing the wife's '95 with BEGI S-2 turbo and will need to plug the oil return line. The line I'm talking about is here:

https://www.miataturbo.net/attachmen...4&d=1219866128

I figure there are two easy ways to do it; by removing the feed fitting from the oil pan and replacing it with a plug, or with a cap over the fitting and leaving the fitting installed into the pan.

Without calling BEGI, does anyone know off-hand what size plug or cap I need, and were I might get one without too much trouble? Thanks

Jim
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Old 09-23-2011, 03:08 PM   #2
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i would keep the tap in the pan and just plug it. what size are the oil lines? look for the same size cap.
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Old 09-23-2011, 04:34 PM   #3
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Thanks for the reply Clos561.

I called BEGI and it turns out the fitting into the Miata pan is made with a 3/8-inch NPT thread. I'll pick up an aluminum 3/8-inch plug from Summit or JEGs, and I'll be good to go.
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Old 09-23-2011, 04:37 PM   #4
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Your can get a plug at any home depot for $4
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Old 09-23-2011, 06:31 PM   #5
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forgot to ask, why are you taking off the turbo?
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Old 09-23-2011, 07:22 PM   #6
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Selling the wife's car; she's got a bad shoulder and her shifting days are coming to a close; I see a E39 in her future.. I figure I'll get more by selling the turbo (BEGI S-2) and car (95 Miata) separately.
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Old 09-23-2011, 07:25 PM   #7
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Quote:
Originally Posted by rharris19 View Post
Your can get a plug at any home depot for $4
You beat me to it.

BTW, it's in the racing aisle.

C
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Old 09-23-2011, 09:12 PM   #8
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Just JB weld a quarter onto the hole
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Old 09-24-2011, 01:32 AM   #9
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Quote:
Originally Posted by rharris19 View Post
Your can get a plug at any home depot for $4
I was thinking an aluminum plug was the way to go because the pan is aluminum and compatible expansion rates will keep the plug where it belongs over the long haul. I'd be surprised if I found an aluminum plug at Home Depot, but you never know.
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Old 09-24-2011, 02:11 AM   #10
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Quote:
Originally Posted by Thucydides View Post
I was thinking an aluminum plug was the way to go because the pan is aluminum and compatible expansion rates will keep the plug where it belongs over the long haul. I'd be surprised if I found an aluminum plug at Home Depot, but you never know.
You won't find an aluminum plug at the hardware store, but ACE Hardware should have brass plugs.

The thermal expansion rate of brass is nearly identical to that of most aluminum alloys.
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Old 09-24-2011, 12:36 PM   #11
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Quote:
Originally Posted by Joe Perez View Post
You won't find an aluminum plug at the hardware store, but ACE Hardware should have brass plugs.

The thermal expansion rate of brass is nearly identical to that of most aluminum alloys.
Thanks Joe, that's good to know.
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Old 09-29-2011, 01:53 PM   #12
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How do I contact you? I don't see an email option on your profile. Looking for 2554 turbo and parts.

Last edited by Mathrips; 09-29-2011 at 03:21 PM.
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Old 10-05-2011, 12:12 AM   #13
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Quote:
Originally Posted by Mathrips View Post
How do I contact you? I don't see an email option on your profile. Looking for 2554 turbo and parts.
Sorry, I'm on vacation and haven't checked back here for a few days. I'll get a hold of you when I return next Tuesday.
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Old 10-05-2011, 12:20 PM   #14
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Pretty sure the plug I got at ACE for the same thing was aluminum (looked like it was cast). It was about $1.
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