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Unread 12-18-2010, 07:47 PM   #1
cgi2099
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1984 CJ7 
 
Join Date: Oct 2009
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Camshaft gear timing help!

Working on a 2002 Jeep Liberty V6 3.7 with blown heads, long story short i had the camshaft gears at top dead center with the V6 mark a 12 o'clock position and the crank lined up with the top dead center line. Pulled the heads replaced gaskets and had every thing ready to go back together and while i was at the parts store the guy i was working with turned the crank with the chains back on with everything still at top dead center the gears ready to go without the secondary chain idlers on, and some how the passengers side cam chain skipped a sprocket on the crank gear when he turned the crank and is not top dead any more but still lines up with the orange dot, what do i do to correct this problem. How do i make sure everything is top dead center after i figure out how to fix this problem.

I really need help with this one guys,
Josh

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Unread 12-19-2010, 12:04 PM   #2
richd
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2008 KK Liberty 
 
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Quote:
Originally Posted by cgi2099 View Post
Working on a 2002 Jeep Liberty V6 3.7 with blown heads, long story short i had the camshaft gears at top dead center with the V6 mark a 12 o'clock position and the crank lined up with the top dead center line. Pulled the heads replaced gaskets and had every thing ready to go back together and while i was at the parts store the guy i was working with turned the crank with the chains back on with everything still at top dead center the gears ready to go without the secondary chain idlers on, and some how the passengers side cam chain skipped a sprocket on the crank gear when he turned the crank and is not top dead any more but still lines up with the orange dot, what do i do to correct this problem. How do i make sure everything is top dead center after i figure out how to fix this problem.

I really need help with this one guys,
Josh
TDC is when the no.1 piston is at the top,and both valves are closed.
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Unread 12-19-2010, 05:44 PM   #3
cgi2099
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the chilton manual I'm using says that the drivers side should be closed and the passenger should be open, is that correct?
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Unread 12-19-2010, 06:11 PM   #4
richd
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Originally Posted by cgi2099 View Post
the chilton manual I'm using says that the drivers side should be closed and the passenger should be open, is that correct?
Just worry about the #1 cylinder,piston on top,both valves closed,and make sure your on the right stroke.When you think its at TDC,rock the engine just a little bit by hand,and the valves shouldnt move.
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Unread 12-19-2010, 06:29 PM   #5
cgi2099
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how do I know what stroke I'm on and how do I check to see if the number one cylinder is on top with the heads on?
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Unread 12-19-2010, 06:39 PM   #6
richd
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Originally Posted by cgi2099 View Post
how do I know what stroke I'm on and how do I check to see if the number one cylinder is on top with the heads on?
Youll have to take out the spark plug,and see if you see the piston.If you have the valve cover off,then you can see the valves.At work we had a whistle hooked up to a hose,and screwed in the plug hole,turn over engine,and when the whistle blew it was TDC.
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Unread 12-20-2010, 04:18 PM   #7
blk00rt
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i always put my finger over the spark plug hole and when the piston is at the top of the hole, your finger will be forced off the spark plug hole.
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