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Thread: 186 in Series 2a timing issue

  1. 7th September 2014, 04:34 PM #1
    BenS2a
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    186 in Series 2a timing issue

    Hi all I have been slowly restoring and driving my 2A 109..(daily)
    It now has a series 3 diff, and shortly a fully rebuilt s3 gear box transfer and fairy overdrive.
    I recently had a full tune and service on the 186 that was already in when I purchased it, and it was discovered the timing was advanced about 20 degrees (off the charts according to my mechanic. He reset it to normal and after that the car was running nicely but had lost all power. Running hotter and wouldn't climb a hill anymore. I went back and we advanced it about 4 degrees and its much better but still not what it was in the hills.
    Mechanic is wondering if the engine may have had a gas cam installed in it?but it had plenty of power before the service. Do we keep advancing the timing to back where it was? Any ideas appreciated.
    The old girls done 3-4 trips from Adelaide to the lower glenelg river in Victoria with half a ton of firewood and never missed a beat. Just not sure what to do about this timing situation.
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  2. 7th September 2014, 05:11 PM #2
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    67hardtop
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    Check the harmonic balancer hasn't slipped giving u an incorrect reading. if it has, set the timing statically with a test light on the points after u have found TDC. Should be set at around 10deg before TDC

    Cheers Rod
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  3. 7th September 2014, 05:18 PM #3
    BenS2a
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    Thanks rod I'm pretty sure the harmonic balancer was checked and was fine. It's using more fuel now that the timing has been wound back and is running hotter also. I know that this is the opposite of what to expect.
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  4. 7th September 2014, 05:32 PM #4
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    Homestar
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    As already mentioned - has a static timing check been done? If it has and everything checks out, I'd put it back to where it was running happily. If it's not pinging when hot and under load, then I would just put it where it sounds and acts its best.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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  5. 7th September 2014, 06:45 PM #5
    Jordan
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    Cam timing gears incorrectly meshed?

    Jordan
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  6. 7th September 2014, 06:53 PM #6
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    Homestar
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    Quote Originally Posted by Jordan View Post
    Cam timing gears incorrectly meshed?

    Jordan
    Yeah, I had that though too, but couldn't quite work out if that would cause the symptoms being described - but I think you may be right.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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  7. 7th September 2014, 07:31 PM #7
    BenS2a
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    Quote Originally Posted by Jordan View Post
    Cam timing gears incorrectly meshed?

    Jordan
    I will look into this thanks Jordan.
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  8. 7th September 2014, 07:39 PM #8
    BenS2a
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    Sorry about my ignorance but checking if the cam timing gears are correctly meshed with no cam information from the 186 install in 1985 is going to mean pulling the engine apart?
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  9. 7th September 2014, 07:49 PM #9
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    scarry
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    Geez,a long time since i played with one of these,but i think it is off with the harmonic balancer,easy with pullers, and then take off the timing gear cover.Also easy to do.

    The cogs have markings on them so you can see if they are lined up correctly.

    As others have said,the main issue we used to have with them was the harmonic balancer slipping on the rubber,which upset setting the timing with a light.
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  10. 7th September 2014, 08:20 PM #10
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    Yes, as described. Off with the balancer and you can remove the timing cover without disturbing the sump if your careful,
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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