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  1. #1
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default Tatra V8 engine tear down project

    Hello all, this is a start of a long project. I was looking for a small compact v8 engine for a project i have in mind and finally got myself a Tatra V8 engine. About 40cm in length and about 60cm wide all aluminum block, air cooled. 2.5 liter 100 HP. So after 4 months it has arrived and is complete. Have started to strip the motor down as you can see the distributor cap got smash up to pieces and the distributor got damage,so far can not see any other damage on the motor which is good as it was not pack into wooden shipping crate.

    !cid_AC600136-F528-4467-951E-DDFB14EC20B2.jpg!cid_B3D3C827-7421-4A94-A571-B9B8379A227A.jpg!cid_EEF9C17B-D487-48FA-8342-C5A410FCA420.jpg
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    Attached Images Attached Images

  2. #2
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Started to remove the left bank of cylinder heads, one of the cylinder had some crusty bits inside so far looks OK.
    Making progress on the tear down, had issues with one of the nuts on the exhaust manifold, after a couple of hours trying to unscrew it i just cut the nut with my die grinder and split the nut. I found one of the piston wrist pin C clips on each end are broken off, have to find a way to get the remaining C clips out.

    IMG_8734.jpgIMG_8750.jpgIMG_8753.jpgIMG_8754.jpg

  3. #3
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Got the rest of the pistons and cylinders out and remove all the camshaft tappets and housings, found three of the tappets broken and the rest of the tappets the faces are heavily pitted. What would cause some of those tappets to break Over rev, lack of oil. Cam shaft looks OK Maybe a polish will do Then i found the timing chain tensioner spring was broken and a lot of slop in the chain and it has been rubbing on the boss were the distributor shaft fits into.
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  4. #4
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    I got the crank out looks OK but will take it to a machine shop for them to check it out, white metal crank shaft bearings.

    IMG_8784.jpgIMG_8786.jpgIMG_8789.jpgIMG_8790.jpgIMG_8748.jpgIMG_8749.jpg

  5. #5
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Started to clean the block, best i take it to a machine shop and have it hot tank.
    Remove most of the studs from under the block and sides,front, then i notice this looks like JB weld it's at the bottom rear end of the block, clean a bit off with a wire wheel, looks like a crack but can not see it going right threw the block. I won't really know until i get the block clean at a machine shop.
    IMG_8795.jpgIMG_8796.jpgIMG_8801.jpgIMG_8804.jpgIMG_8811.jpg

  6. #6
    Join Date
    Mar 2014
    Location
    South of Adelaide
    Posts
    1,239

    Default

    Whats parts availability like for those engines?

  7. #7
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Finished making the metal fixture for the engine block and now can fit the block onto the engine stand. Got this idea from a chap in the UK who has rebuilt a couple of these engines, he has been helping me out with this project.
    Now cleaning has began and will take a while before i can start measuring and ordering parts for the rebuild.

    IMG_8812.jpgIMG_8813.jpgIMG_20220201_132121.jpgIMG_20220201_132138.jpg

  8. #8
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Quote Originally Posted by snapatap View Post
    Whats parts availability like for those engines?
    There are parts available, all comes down what parts you need. I may need to buy used parts and have them refurbish.

  9. #9
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

    Default

    I hope whatever you put this engine in is better looking than the car it came out of!
    Good luck with the rebuild.

    https://en.wikipedia.org/wiki/Tatra_603
    Chris

  10. #10
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Quote Originally Posted by jack620 View Post
    I hope whatever you put this engine in is better looking than the car it came out of!
    Good luck with the rebuild.

    https://en.wikipedia.org/wiki/Tatra_603
    Thanks, yep will be something like this

    V8-Alfred-01-hp.jpg

  11. #11
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,594

    Default

    Are you going to keep it stock or improve (like electronic ignition) as you go?

    Michael

  12. #12
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    I had a thought concerning that smashed dizzy cap. I would not expect there will be any spares waiting to be found in a disused European warehouse anywhere?

    Given that a bunch of our blokes build and operate 3D printers can thry tell us is it conceivable that a replacement cap could be duplicated on said 3D printer.?

    I suppose it is a matter of finding the correct filament material. I know the old time cap was likely to be bakelite, but surely there is some space age wonder material that could be used.

    If there was enough left of the pieces could they be glued together to form the model to measure from?

    Or is it a rush of excrement to the brain perhaps?

    3D printer blokes, is it possible?

    Or maybe go straight to electronic ignition.

    Grahame

  13. #13
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Quote Originally Posted by Michael G View Post
    Are you going to keep it stock or improve (like electronic ignition) as you go?

    Michael
    I think i will go for the MSD DIS direct ignition kit https://www.holley.com/products/igni...ss/parts/60151 May have to modify the pickup sensor on front of the crank shaft as the distributor will be in the way of the motor cycle frame. Couple of videos of what this chap has done. https://www.youtube.com/watch?v=3cdVsfirEzQ https://www.youtube.com/watch?v=gV0o...ndex=22&t=229s

  14. #14
    Join Date
    Oct 2016
    Location
    Melbourne
    Posts
    471

    Default

    Quote Originally Posted by Grahame Collins View Post
    I had a thought concerning that smashed dizzy cap. I would not expect there will be any spares waiting to be found in a disused European warehouse anywhere?

    Given that a bunch of our blokes build and operate 3D printers can thry tell us is it conceivable that a replacement cap could be duplicated on said 3D printer.?

    I suppose it is a matter of finding the correct filament material. I know the old time cap was likely to be bakelite, but surely there is some space age wonder material that could be used.

    If there was enough left of the pieces could they be glued together to form the model to measure from?

    Or is it a rush of excrement to the brain perhaps?

    3D printer blokes, is it possible?

    Or maybe go straight to electronic ignition.

    Grahame
    I can get a replacement dizzy cap. I think i might go with distributor set up for engine break in procedure first and then switch to o electronic ignition.

  15. #15
    Join Date
    Jan 2007
    Location
    Katoomba NSW
    Posts
    209

    Default

    The build you linked looks and sounds awesome. Looks a bit tricky to ride though.
    Keep us posted. I will be following your build.
    Do you have a base bike in mind?
    Built: a Bench,a Desk,an Archery Display,

    Those were the droids I was looking for.

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