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Recent content by dirk489

  1. dirk489

    Hydraulic lifter wear

    I had beautiful dendrides formed on some followers with a new cam. It appeared to be a hardening problem with the cam.
  2. dirk489

    Cast iron-cast steel cyl. heads

    Thanks guys! So it looks like cost being the main reason beside more difficult to cast.
  3. 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?
  4. dirk489

    GL5 oil

    It was a prewar axle,but cannot remember which car. I think Your comment is right! Thanks!
  5. dirk489

    GL5 oil

    Thanks for answers! What I saw was just the remains of the gears,happened some time ago. They are reputed mechanical restorers and the only thing I can think off is that the vegetarian oil that remained coagulated with the new GL5 oil. They do not mix. The only reason I now for not using GL5 has...
  6. 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...
  7. dirk489

    Piston broken in half(top-bottom)

    To :gruntguru: the rebuild with Arias pistons is what I did recently. The failure history of the Original engines is interesting: All the engines I took apart (about 10) with the Original H/C pistons showed seizure marks on the sides. When it became apparent at the factory,after the American...
  8. dirk489

    Piston broken in half(top-bottom)

    Engine was rebuilt with Arias pistons and indeed rev limiter!It was difficult to find decent rod bolts as not covered by ARP(Too long) Dirk
  9. dirk489

    Piston broken in half(top-bottom)

    Well,the proposed project wasn't taken up by one of the students. Pity, as the lecturer found it interesting.He will keep the parts ,maybe later on someone will take it up. Thanks all for the interesting comments. Dirk
  10. dirk489

    Piston broken in half(top-bottom)

    To Panther 140:the rod and piston are at the University as a project,will get results in april/may. Investigation of the other rods showed that the thread was torn out partially on several of them. That can only happen when a very heavy pulling load was applied,which makes the overevving...
  11. dirk489

    Removal of ethanol from gasoline

    Have a look at this, just stumbled on it: www.ethanil.co.uk Dirk
  12. dirk489

    Piston broken in half(top-bottom)

    The reasoning is right,with the exception that the bolts were new and engine only did 50 miles in total. I would not expect fatigue marks on an engine which is basically still running in?I gave the rod to the University lab and they will examine it next term. Will keep You posted then. Dirk
  13. dirk489

    Piston broken in half(top-bottom)

    To FredRosse:I mentioned 45 ,lubed as given by manufacturer of rods,and I think ARP as well.I have a racer with Cunningham rods,same spec. Dirk
  14. dirk489

    Piston broken in half(top-bottom)

    Both pistons cast.The 9000 one I did myself.... Thought I was in 4th gear but was in 3rd.With the longer and lighter rods the engine is much smoother.I noticed something was wrong when I saw the rev needle pass the ignition light......After that it was silence. The first engine was in 1st...
  15. dirk489

    Piston broken in half(top-bottom)

    Hi all, Dicer: 20/50 oil,no trace of the wrist pin. Might have thrown out with the debris of the underside of the piston. I have some pictures of a similar engine desaster,also on cyL nr.2. Rods are Phoenix,bolts ARP 2000 at 45 lbs.ft. Pistons were a lot lighter(Triumph Bonneville Powermax)...
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