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  • Donating Members
  • Member For: 16y 2m 28d
  • Gender: Male
  • Location: VIC

This is very common when a valve has hit a piston - from my experience you can bend a valve and it not show the usual signs as spring pressure seats the valve good enough to mask the problem - and in time the valve will fail from fatigue its like bending a metal backwards an forwards till it breaks. Note my experience is with larger valves and spring seat pressure - The valve guide might give you the answer to what has been going on with the valve

  • Dropping a turd
  • Gold Donating Members
  • Member For: 17y 7m 14d
  • Gender: Male
  • Location: Perth

If any of the other valves show cracking, Ford should be liable. You need to strip the head and fluro mag part or dye pen all the valves. Seeing you are in Perth why dont you call me and I will organise it 0411733583

Edited by arronm
  • Donating Members
  • Member For: 14y 5m 22d
  • Gender: Male
  • Location: Parramatta, NSW

That's one definitely ruined engine. On a stock car, how does this sort of thing happen? blueprint said the chain guide broke a couple of years ago but I've only seen pics like that on tuned cars and normally 350+ cars.

  • Member
  • Member For: 19y 14d
  • Gender: Male
  • Location: @ my laptop

we have seen many chain guide issues that have caused the cams to jump up to 3 teeth and not have any valve issues, saw 1 BA that had jumped maybe 15 teeth and bent all the exhaust valves

Edited by ratter
  • Donating Members
  • Member For: 17y 3m 7d
  • Gender: Male
  • Location: Wanneroo

This is all true and from my understanding the cams need to be overly advanced for the intake valves to hit the pistons, but that being said it has happened. When the chain jumped it was just after it changed from first to second, after it happened I lost all power quickly came to a stop and the motor was still just running but it sounded awful something like putting something in the spokes of your bike. I mentioned this to the head mech and he said it was because it was overly advanced and it was dieseling. I didn't believe what he said but had no choice

  • Member
  • Member For: 19y 14d
  • Gender: Male
  • Location: @ my laptop

we recently had a FG that had jumped 2 or 3 teeth (can't remember off the top of my head) and was very noisy and was 100% ok after rectifying it, none of the others have been noisy though.

good luck with ford though

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