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2.4L Crank Position

 
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Old 25 Oct 2014, 01:27 pm
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Default 2.4L Crank Position

Hi guys,

Long time reader, 1st post.

In the middle of the timing belt/water pump replacement on the wife's 2004.

The crank moved while I was removing/installing the timing gear. I've read the Haynes and searched the posts, but couldn't find the "oop's" section on the crank position.

Is it possible to be "180 degrees" out of position? If so, how do I determine TDC?

Any help appreciated.

Thanks!
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Old 25 Oct 2014, 01:44 pm
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Default Re: 2.4L Crank Position

The crank moving is ok, you just line the arrow on the Gear to the trailing tooth to the mark on the Oil pump housing.

Easy peasy
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Old 25 Oct 2014, 05:40 pm
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Default Re: 2.4L Crank Position

Pull number one spark plug out, insert a long extension in hole and slowly rotate crank until extension is all the way up (and not going back down) That is very close to top dead center (you would need a dial gauge to get it perfectly though). The crank sprocket should be lined up with pointer once it is top dead center
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Old 25 Oct 2014, 06:21 pm
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Default Re: 2.4L Crank Position

Quote:
Originally Posted by xwing777 View Post
Pull number one spark plug out, insert a long extension in hole and slowly rotate crank until extension is all the way up (and not going back down) That is very close to top dead center (you would need a dial gauge to get it perfectly though). The crank sprocket should be lined up with pointer once it is top dead center
You need the Mark on the oil pump housing to line up with the trailing edge of the tooth nearest the mark on the sprocket, or you will have one hell of a time hitting timing marks.
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Old 25 Oct 2014, 06:44 pm
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Default Re: 2.4L Crank Position

Quote:
Originally Posted by jabili1979 View Post
You need the Mark on the oil pump housing to line up with the trailing edge of the tooth nearest the mark on the sprocket, or you will have one hell of a time hitting timing marks.


Quote:
The crank sprocket should be lined up with pointer
Same thing i said but worded differently i guess
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Old 26 Oct 2014, 10:38 am
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Default Re: 2.4L Crank Position

Thanks guys!

I recall working on a Chevette "back in the day" and afterwards it wouldn't start because it was "180 out", but I guess that's what the crank sensor is for.

I was worried because the #1 piston reaches TDC on both the compression and exhaust stroke. I guess the computer will assign it and all will be good if the timing marks are good.

Going back in today on the timing marks as the first attempt failed yesterday.

Xwing you rock! Been reading the How To on your wife's 2006. Great stuff.

Thanks again!!
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Old 26 Oct 2014, 01:05 pm
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Default Re: 2.4L Crank Position

3wildboys, So the crankshaft is either on mark or off mark, its the camshaft timing that will line into the proper stroke, just follow the procedure in the book to the T.

Rotate the crankshaft clockwise till the mark on the gear lines up with the mark on the oil pump, THEN looking at the teeth on the gear rotate till the trailing edge of the tooth nearest the mark on the gear lines up with the mark on the oil pump.


Timing Marks <--- click me for wondrous glory
Timing Marks

Last edited by jabili1979; 26 Oct 2014 at 01:07 pm.
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