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Engine Specific Info and Questions => IDI Engine => Topic started by: ein bora on January 27, 2010, 08:55:06 am

Title: 1.9 IDI, TDC - Question.
Post by: ein bora on January 27, 2010, 08:55:06 am: Just finished installing my rebuilt Giles pump after having some timing issues. My flywheel has two TDC timing marks. Oddly I can get the pump to run on both? Does anybody have any idea as to which one I should be using??

Thanks.
Title: Re: 1.9 IDI, TDC - Question.
Post by: Powered by Spearco on January 27, 2010, 10:59:47 am: From what I remember about the two marks is that one is a 6deg. before TDC and the other is the 0 for TDC. The 6deg. has a diamond shape notch, the 0 is dot.
Title: Re: 1.9 IDI, TDC - Question.
Post by: lovinthedeez on January 27, 2010, 12:55:28 pm: Quote from: Powered by Spearco on January 27, 2010, 10:59:47 am
From what I remember about the two marks is that one is a 6deg. before TDC and the other is the 0 for TDC. The 6deg. has a diamond shape notch, the 0 is dot.

nope. the diamond is the tdc and the 0 is the 6dbtdc
Title: Re: 1.9 IDI, TDC - Question.
Post by: burn_your_money on January 27, 2010, 06:38:12 pm: I think it depends on the style of flywheel you have. Most diesels have a diamond at TDC, although I have also seen a 0. Thumbs up for Germans.
Title: Re: 1.9 IDI, TDC - Question.
Post by: Powered by Spearco on January 27, 2010, 09:30:41 pm: Well if your looking at a flywheel that has two timing marks, then 0 would have to be TDC. If you still can't find a true TDC mark, the make a degree wheel of some sort a find it that way, I'm sure theres other ways of finding TDC .
Title: Re: 1.9 IDI, TDC - Question.
Post by: lovinthedeez on January 27, 2010, 09:57:17 pm: Quote from: Powered by Spearco on January 27, 2010, 09:30:41 pm
Well if your looking at a flywheel that has two timing marks, then 0 would have to be TDC. If you still can't find a true TDC mark, the make a degree wheel of some sort a find it that way, I'm sure theres other ways of finding TDC .

then why does the dimple (or 0) arrive before the diamond?
Title: Re: 1.9 IDI, TDC - Question.
Post by: Vincent Waldon on January 27, 2010, 10:29:47 pm: Perhaps someone's installed a gasser flywheel... they are marked like this:

(http://i197.photobucket.com/albums/aa85/vwaldon/flywheelmark_TDC.jpg)
Title: Re: 1.9 IDI, TDC - Question.
Post by: lovinthedeez on January 27, 2010, 11:07:38 pm: inserts foot into mouth :D