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Thread: mrpham's ITB MX-5

  1. #431
    Member mrpham's Avatar
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    Engine Rebuild Part 2 - http://omgpham.com/engine-rebuild-part-2

    I got my block back from Chilton Engineering this week. They are always my first choice when it comes with engine machining work, can't recommend them enough.



    David and his team carried out the following work:

    • Measure and hone cylinder bores
    • Deck the block
    • Remove and replace oil gallery plugs
    • Clean oil ways
    • Supply and fit welch plugs
    • Measure and cleaning of pistons
    • Remove balls in crankshaft and replace with screw in plugs
    • Crack detect crankshaft
    • Check and linish crankshaft
    • Block hot washed
    • Supply of new rings and bearings

    Like last time, the block was wire brushed to get any loose bits off. Fortunately, the block was acid/hot washed by the machine shop so didn't have to clean as much




    I found that one can of VHT Engine Primer was enough to paint my whole block, I went with gloss black.




    I also disassembled my oil pump to give it a once over and make sure everything was within tolerances.

  2. #432
    Member crbn's Avatar
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    mint interior
  3. #433
    Member mrpham's Avatar
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    Engine Rebuild Part 3 - http://omgpham.com/engine-rebuild-part-3

    Update time!

    After I gave the paint some time to dry, it was time to give the internals a wash down. For this I was advised to use dish washing liquid with water, once that was done everything was given a wipe with engine oil to prevent any surface oxidisation.




    The crank journals were given a good clean and main bearings installed.



    Before the crank can be installed, the clearances need to be checked using Plastigauge.



    Once you have the clearances checked and within recommended specifications, it's time to pull it apart, clean and than re-fit using assembly lube.




    In the next episode, I hope to have updates on the ring gaps and final assembly =).
  4. #434
    Member mrpham's Avatar
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    Engine Rebuild Part 4 - http://omgpham.com/engine-rebuild-part-4

    Over the last couple of days I've been able to install the pistons back into the block =)

    Because this rebuild is a learning process for me, I choose to re-use the old pistons. Everything is pretty much standard.



    Stock pistons being re-used as they all measured spot on.



    The oil expansion and both rail rings installed. Very easy to do , just make sure to use a lot of oil to lubricate everything.



    Upper and lower rings installed, again very easy to install. Just make sure you use a ring spreading tool. The rings need to be clocked into their correct orientation too. I'll try upload some images from the service manual a bit later on.




    Once rings are on, oil everything up again. Than it's time for the ring compressor to do it's thing. This part was a little nerve racking as a first time engine builder, but I'm confident it went well.



    AND DONE!!! For now...
  5. #435
    Member Jimmy_HR32's Avatar
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    This is a great read, well documented too and lots of pics.

    Keep it coming.
  6. #436
    Member mrpham's Avatar
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    Thanks man! Hopefully have more updates after I get back from holidays. I'm also helping a friend build his SR20DET MX-5 as well

    http://omgpham.com/sr20-mx-5-build-update
  7. #437
    Member mrpham's Avatar
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    A little down time while I wait for gaskets etc to arrive to complete the engine rebuild.

    Circuit Breakers - http://omgpham.com/circuit-breakers

    I recently ordered some blade style circuit breakers from Narva, actually got the idea from a site I visit frequently:

    https://www.rbracing-rsr.com/wiring_ecu.html



    Just installed them tonight, and I'll report back with how reliable they are. They're basically just like a regular fuses except you don't need to replace them. If a fuse blows, you just simply reset it after diagnosing the problem.

    Old fuses that will be replaced.



    New circuit breakers in, just waiting for the 5A one because it wasn't in stock.

  8. #438
    Member mrpham's Avatar
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    Receives some genuine Mazda parts to finish off my bottom end build

  9. #439
    Member mrpham's Avatar
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    Engine Build Part 5 - http://omgpham.com/engine-build-part-5

    Small updates are small.

    Had a day off this Sunday so I was able to install the oil pump, rear cover and both front/rear seals. The oil pump was packed with Vaseline, apparently it's an old trick that gives the pump oil pressure on first crank.



    If you plan on deleting the AC like I have, make sure you replace the long AC bracket bolt with a shorter M8x1.25 45mm bolt. It's one of the five bolts that hold the oil pump to the block! I bought mine from a local nut/bolt shop.



    I've also started masking up my sump, as I'm looking into getting it powder coated. Getting quotes tomorrow

  10. #440
    gmr
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    fav build love it

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