12A S3 Engine Re Build

Rotary Engine Chat......Got A Problem With Your Rotary Engine.... Need Help...?
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DKWW2000
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Location: English Riviera - South Devon

12A S3 Engine Re Build

Post by DKWW2000 » Mon Feb 06, 2017 8:06 pm

I have taken apart a S3 NA engine with the intention of re-building.
I have found the Housings/Irons/Bearings & Shaft were all Scrap :o :o
I intend to make a build thread but will also need to ask a lot of what will seem like stupid questions. If anyone has any advice please shout because I do not know what I do not know :oops:
I already have 2 serviceable Housings/Rotors/New Apex Seals & have recently acquired rear & central irons & E shaft + Torringtons/New gaskets/Seals.
Q1.
I have put new bearings in the Stat gears but do not know if/how if I need to make sure they are honed/matched to the shaft?
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

TOOL
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Joined: Thu Sep 01, 2011 10:30 am
Location: Var, France (ex NZ, ex UK)

Re: 12A S3 Engine Re Build

Post by TOOL » Tue Feb 07, 2017 12:41 am

Measure your eshaft externally.

Measure your bearing internally.

Work out the difference and see if it meets spec.
Back in sunny France

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DKWW2000
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Re: 12A S3 Engine Re Build

Post by DKWW2000 » Sun Feb 19, 2017 4:59 pm

Thanks for that Andy.

Next problem is one of my Housings has a raised lumpy hole, the other is flat.
How is the best way of making it flat, cut with a Dremmel and flatten with a punch?
Also what is best to fill the hole with? Exhaust paste/Fire Gum or some other filler?

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RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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gt_james
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Location: Pershore, Worcester UK

Re: 12A S3 Engine Re Build

Post by gt_james » Sun Feb 19, 2017 5:48 pm

maybe I'm imagining it but the exhaust ports look different shapes? can you post a pic of the inside surface? I'm not sure about the lump in the sleeve though, maybe take it out?

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DKWW2000
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Re: 12A S3 Engine Re Build

Post by DKWW2000 » Sun Feb 19, 2017 5:57 pm

gt_james wrote:maybe I'm imagining it but the exhaust ports look different shapes? can you post a pic of the inside surface? I'm not sure about the lump in the sleeve though, maybe take it out?
Both ports are same size & in same position inside - "maybe take it out?" do you mean the sleeve?
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

KiwiDave
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Location: Feltham, Southwest London

Re: 12A S3 Engine Re Build

Post by KiwiDave » Sun Feb 19, 2017 11:59 pm

I believe that the sleeves are emissions related, as are the small ports underneath. So for UK purposes, they are not strictly necessary and even less so if you've removed the rats nest vacuum rubbish.

Mister TOOL will most probably have the answer as to leaving it be or whatever th:
1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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DKWW2000
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Location: English Riviera - South Devon

Re: 12A S3 Engine Re Build

Post by DKWW2000 » Thu Feb 23, 2017 3:22 pm

Exhaust port now sorted:-

Removed this by drilling out both Pinch Pins in side of housing:-

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Replaced with a standard from a shot housing:-

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Housings, Irons & Cover now nearly ready to start rebuild of spare engine rdg rdg rdg :-

Image
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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A7RXY
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Location: Upminster, Essex UK

Re: 12A S3 Engine Re Build

Post by A7RXY » Thu Feb 23, 2017 4:25 pm

Pete that looks fantastic, you can do one for me next ...... Only joking

KiwiDave
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Re: 12A S3 Engine Re Build

Post by KiwiDave » Thu Feb 23, 2017 4:58 pm

rbld rdg th: sya
1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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DKWW2000
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Re: 12A S3 Engine Re Build

Post by DKWW2000 » Thu Feb 23, 2017 5:17 pm

A7RXY wrote:Pete that looks fantastic, you can do one for me next ...... Only joking
At the moment it is like a lot of Cars & MCs that get taken to shows - there are No working parts inside :o
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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