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Topic: tdc (Read 790 times) |
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bobo_490
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any body any idea of tdc marks on crank pully on a cosworth mine has three marks on it any idea
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grandadman
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Re: tdc
« Reply #1 on: Jul 20th, 2008, 12:21am » |
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I have exactly the same question   
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Simmo
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Re: tdc
« Reply #2 on: Jul 20th, 2008, 7:17am » |
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Does THIS help?.
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grandadman
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Re: tdc
« Reply #3 on: Jul 20th, 2008, 12:39pm » |
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Hi Simmo thanx for you help have a look at THIS
confused.com
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Simmo
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Re: tdc
« Reply #4 on: Jul 20th, 2008, 1:23pm » |
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Grandad. I have to confess all this is beyond me BUT have you noticed that in your link,if you move the cursor on to the pulley below the large black arrow, a 'pop up' says TDC?. It looks as though it is showing some sort of 'peg' in the block aligning with the left hand notch??.
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grandadman
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Re: tdc
« Reply #5 on: Jul 20th, 2008, 2:13pm » |
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Hiya. That is what I called the pic tdc it's an internet id of mine.
That peg is a static item attached to the block as a reference point to which one turns the engine to a point where there is 'perfect' alignment for tdc [I think for #1 cylinder I'm not sure about this bit] the problem is that we have three yes three variable notches on our pulley hence the question Why three
moreconfused.com
I have moved the pic to here
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grandadman
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Re: tdc
« Reply #6 on: Jul 20th, 2008, 10:08pm » |
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Sorted . the diagram is absolutely corect 
Testing; confirming tdc on cyl #1
unconfused.com 
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Simmo
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Re: tdc
« Reply #7 on: Jul 21st, 2008, 6:58am » |
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Well done Grandad !  . The other marks remind me of the days when you used a 'strobe' light to adjust the timing ie: the ignition point was so many degrees before TDC and you twisted the distributor to get it right!!. Only some of us will remember those days! 
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pete from Hull
Senior Member
Non Scorpio at the moment, but still interested...
Posts: 1365
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Re: tdc
« Reply #8 on: Jul 21st, 2008, 8:31am » |
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The first mark would be ?deg before TDC surely so second mark would be TDC and third one, I don't know... for luck maybe?
hth
Pete
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