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  • Users: dirk489
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  1. dirk489

    Cast iron-cast steel cyl. heads

    Why is cast steel not used for cylinder heads prone to cracking with cast iron?Most 1950-60 MG' cyl.heads I see have cracked. Is it a price question or a material one?
  2. dirk489

    GL5 oil

    I recently visited a restoration firm in Germany where I was shown a rea raxle with wormdrive where the bronze main gear was totally worn away. The restorer told me that after changing to GL5 oil the axle started whining and desintegrated within one hour. I know that some older EP oils had...
  3. dirk489

    Piston broken in half(top-bottom)

    I reconditioned a friend's engine which broke later on during running in.The piston broke just on the pin line,conrod bolts snapped clean off, smashed the whole block. My question is: is this always due to overreving or is there another possibility? Dirk/Antwerp
  4. dirk489

    Cylinder liners frozen with liquid nitrogen before putting in

    Hi all, I recently had an MGB block where one cyl. liner had to be replaced being scuffed. The machine shop always will rehone the next cylinder as well as pressing in the liner will bring deformations in the cylinder next to it. We discussed freezing the new liner in liquid nitrogen and...
  5. dirk489

    Coates CSRV

    How are You guys thinking about the Coates rotary valve system?
  6. dirk489

    30 degree valves

    Hi all, I have an old Italian motor bike with 30° valves. I always wondered why they did this(The Alfas have them as well) Is there any advantage? Or is it an adaptation for quick setting the valve/seat combination? Thanks, Dirk/Antwerp
  7. dirk489

    Sandcast aluminum sump

    Hi guys, I recently put a sandcast alu sump on my car; I was told not to sandblast it as debris could collect in the pores. Anyway,very quickly the inside of the engine was worn out. Would someone know the procedure to handle this? I am reluctant to just paint the inside with Glyptol paint as I...

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