Help! New Camshaft and it won't Start
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  1. #1
    Fellow Frogger! neil's Avatar
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    Default Help! New Camshaft and it won't Start

    Hi all

    Just trying to figure out it I have the Cam timing 108deg out!

    I have installed the new cam and it wont start.

    Can somebody tell me how I can tell if I'm 180deg out?

    Neil

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    205GTI/Mi16
    Tony Sprint Kart

  2. #2
    1000+ Posts PeterT's Avatar
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    If you had the cam timing out that much valves would be hitting pistons. Provided you've used the three dowels to lock the cams and crank, it's impossible to get wrong. You haven't changed anything on the flywheel end, so crank sensor should still be fine. I'd suspect the distributor/rotor button. Verify by putting a timing light on the coil. If there's nothing coming out of the coil you'll need to back track from there.

    '92 205 Mi16
    '90 Mi16x4

  3. #3
    Budding Architect ???? pugrambo's Avatar
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    Quote Originally Posted by neil
    Hi all

    Just trying to figure out it I have the Cam timing 108deg out!

    I have installed the new cam and it wont start.

    Can somebody tell me how I can tell if I'm 180deg out?

    Neil

    when you put it all together did you turn the motor over by hand to make sure everything was ok ?

    i'm not entirely sure but the starter would nearly stop spinning the motor if the valves hit on trying to start the car

    turn it over by hand to ensure the motor will go a full cycle then do a compression test and then check for spark and fuel
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  4. #4
    Fellow Frogger! neil's Avatar
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    Can you confirm that with the dowl in the crank all pistons are held half way up the bore?

    if I'm correct it is possible to install the cam shafts 180deg out?

    The engine spun freely by hand and I assume that I would know if valves hit pistons.

    The coil is providing good spark soI can rule that out.

    If by chance the crank angle sensor has gone how would I tell?

    Thanks Neil
    205GTI/Mi16
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  5. #5
    1000+ Posts HONG KONG PUGGY's Avatar
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    Default Distributor drive??

    Neil,
    Is there a seperate drive that has to be fitted to the camshaft for the distributor drive on this engine. I ask because Renault 16(807) type engines have a seperate toothed drive hat is fitted to into the block to drive the distributor, and if you did place this 180 degrees out it would all be out. The distributor drive on the se engines is also offset slightly and if you were able to force fit the distributor incorrectly it would be out 180 deg also. Just a couple of suggestions.
    Start at the simple things...are the leads placed in the correct order on the distributor cap?

    Good luck.
    Chris.
    P.S. Start at the simple things...are the leads placed in the correct order on the distributor cap?

  6. #6
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by neil
    Can you confirm that with the dowl in the crank all pistons are held half way up the bore?

    if I'm correct it is possible to install the cam shafts 180deg out?

    The engine spun freely by hand and I assume that I would know if valves hit pistons.

    The coil is providing good spark soI can rule that out.

    If by chance the crank angle sensor has gone how would I tell?

    Thanks Neil
    With the dowel in, locking the crank to the block, all the pistons are level, half up and half down. If the cam sprockets are dowelled to the block, then they are correctly timed with the crank. After removing the three pins, you should rotate the engine through 720 deg. and confirm that the pins can still be inserted. If so, it's timed correctly.

    You mentioned there is a spark at the coil. This confirms the crank sensor, ECU, igntion module and coil is working. Is there a spark at each plug though?

    Also, are the injectors working and is there fuel pressure?

    What is the compression in each cylinder?

    '92 205 Mi16
    '90 Mi16x4

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