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Thread: Stupid mistakes, mmm.

  1. #1
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    Stupid mistakes, mmm.

    Well, learnt a valuable lesson last night -engine spins clockwise if you're looking at it from the front.
    I did read that it spins anticlockwise, and the fan seemed to confirm this, so I dialed in the can wrong didn't I....
    Needless to say it wouldn't start.

    So with some help we had the cam redialed back in in under 2 hours; so today I'll bolt it all up again.

    Elementary dear Watson, elementary.

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    Nothing broken (except maybe some ego) put it down to R & D or just pretend it didn't happen

    Gary

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    Yes, r and d, thats it. As it was about 110 advanced I was simply trying to get the torque curve to peak at 9000 rpm...
    Oh well, starting it tomorrow.

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    Well, got it all back together and it starts, but only runs for a few seconds. Throttle or no throttle doesn't make any difference.

    When its winding over I get a pop-pop...pop-pop. Which I though might be two cylinders not firing. The coil pack positive feed has perfect continuity, as is the ecu feed to three of the coils. But it is difficult to test as my test probes are quite large.

    I'll try on lpg tomorrow to rule out injector issues.

    What I'm wondering is, should it fire up on 6 cylinders, does an engine that's misfiring make a light popping sound as its winding over and, could it be anything else?

    All else is good though, motor sounds good, and got oil pressure.

  5. #5
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    Sounds like a cylinder or two are firing when they shouldn't!

    I would double-check the plug leads are in the correct order.

    Failing that I am at a loss. Give me a carby motor and ill go to town on it, injection is something I'm not quite all-over yet.

    Cheers
    Keithy

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    Quote Originally Posted by benji View Post
    Well, learnt a valuable lesson last night -engine spins clockwise if you're looking at it from the front.
    I did read that it spins anticlockwise, and the fan seemed to confirm this, so I dialed in the can wrong didn't I.....
    The fan rotates in the opposite direction to the engine. Note the fan belt path - under the engine pulley (ribbed side) and UNDER the fan pulley (flat side).



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    Lol, yes, I won't forget that one now.

    Got it going this arvo, two leads were wrong and had the lpg wiring around the wrong way, turning off the injectors (managed to test the other coil and it's fine).

    Now i've got 1 lifter that has bleed down. All were completely silent when I started it, and after 4 minutes it started to go down. After the cam run in it feels completely empty, and I can press the pushrod down against the internal spring of the lifter 15mm or so. All the other lifters are fine.

  8. #8
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    Bugger! It's a pain of a job for just one lifter!

    How does the engine sound/feel?

    Did you end up getting the torque cam you spoke of in your last thread?

    Cheers
    Keithy

  9. #9
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    Yeh I did get the cam, the 5240-110 - can't wait to see how it goes, the better half is buying me a tin of tinea cream - although I think itchy feet is a syndrome...

    The data sheet that come with it said 1.2246mm lift at TDC, though the closest chain tooth was 1.116mm - which I don't think is to much of an issue.

    The engine sounds a LOT quieter than before and solid, though it is lumpy because of the cam, but should smooth out a lot as the ecu re-leans. I should probably re-set the adaptive values... the idle is still perfectly fine though. I took a few acurate L/100k measurements before hand, and a few spots around town where I could get to 60kph by; so it should be interesting.

    Throttle responce is so much better too, though I think that's a result of getting the injectors cleaned.

    Talking to dad just before he said sometimes the lifters get an air lock in them, and they need to go through a few heating and cooling cycles to bleed it out. I'm honestly not fussed about changing a lifter though, half a days work.

    Fun times ahead, can't wait.

  10. #10
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    Sounds good mate! Your old boy could well be right. If they haven't been pre-pumped quite right they get air locks. Plenty of times I've helped out the old Holden lads when rebuilding their train-like red motors. Sometimes you get lucky and the air lock disappears, other times it could just be a dodgy lifter.

    I'm interested to hear your feedback on the cam! If mine ever gets to rebuild stage I'm either going to stroke it and put a nice torquey cam in, or ill go straight to the LS1/2 with a good bottom end cam or stroker kit. Ultimately I'd love a diesel conversion but they all seem to cost more...

    Good work mate!
    Keithy

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