12A bridgeported engine

For Sale

Engine - Complete

Feb 21, 2026, 06:26 PM | Replies: 6 | Views: 373
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
  • Engine - Complete - 12A bridgeported engine - Used - All Years  All Models - Menlo Park, CA 94025, United States
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  • Price
    $2,000
    • OBO
  • Location Menlo Park, CA, 94025, USA
  • Condition Used
Description:

I have for sale a complete 12A engine that has been bridgeported. Engine was removed and disassembled for a rear coolant seal failure and most parts have been run through an ultrasonic cleaner,

This listing is an engine core thats been bridgeported that needs a new seal and gasket kit to be built
2 12A rotors with new rotor bearings installed
2 stationary gears with new stationary gear bearings installed
2 rotor hosuings
rear iron
front iron
middle iron
front cover
oil pan and strainer
water pump housing and pulley
distributor
used metal oil control rings
tension bolts
oil pressure sender
beehive oil cooler and pedestal
brand new front and rear main seal
all parts in front stack except needle/thrust bearings and spacer
rear flywheel (a bit rusted but should still be useable)

looking for $2k obo for everything as one and would like to not part out at this time

and for an additional $600 I have a set of used one piece carbon apex seals that meet mazda spec to be used again

I also have if the buyer wants a good carb and intake manifold as well as a rebuilt OMP


 

Last edited by yoi193; Feb 21, 2026 at 06:40 PM. Reply
Old Feb 22, 2026 | 01:51 PM
  #2  
TOOSHORT_88's Avatar
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Do you know who did the “ Bridgeport”
those rotor housing…. How did they perform b4 tearing down the engine
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Old Feb 22, 2026 | 03:49 PM
  #3  
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I have a whole engine build thread from the previous owners of the engine that did the Bridgeport. Engine performed well for 24 hour of lemons endurance racing before it was sold to another owner who overheated the engine with bad radiator fans which caused the rear iron coolant seal failure. I’ll post the thread to the build of the engine later today
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Old Feb 22, 2026 | 05:48 PM
  #4  
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https://speedchimpracing.blogspot.co.../part-10a.html

Build thread of the engine on the previous owners blog
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Old Mar 7, 2026 | 10:53 AM
  #5  
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Price drop to $1500, if it doesn’t sell here I may just part it out
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Old Mar 7, 2026 | 12:18 PM
  #6  
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In this particular engine.
where are the pictures of the Bridgeport?
What is the measurement of step wear ?
have u measured the eccentric shaft runout?

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Old Mar 7, 2026 | 12:59 PM
  #7  
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Originally Posted by TOOSHORT_88
In this particular engine.
where are the pictures of the Bridgeport?
What is the measurement of step wear ?
have u measured the eccentric shaft runout?
damn, didn’t realize they were missing.

step wear is minimal but I don’t have a number measurement. I don’t think it catches fingernail. I’ll have to lookup how to measure e-shaft runout


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