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Unread 07-17-2008, 12:58 PM   #1
Zazoos
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1992 YJ Wrangler 
 
Join Date: Jul 2007
Location: Longview, TX
Posts: 85
Cam Thrust Pin and Spring?

Hey Gang,

My Haynes manual shows a picture of a thrust pin and spring placed in the end of the cam gear bolt head. However, they only talk about the thrust pin in the 6 cylinder section. Does the 4 cylinder have a thrust pin and spring? What is the purpose of the thrust pin?

Thanks,
Zazoos

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Unread 07-17-2008, 01:16 PM   #2
pat8942
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1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Deming,New Mexico, New Mexico
Posts: 2,178
Only the 6cyl engines have the thrust pin and it's to keep the cam from walking forward.
The 2.5 has a chain tensioner and the chain stays tight so the cam can't move forward but the 6cyl doesn't have a tensioner so if the chain gets slack in it the cam can move forward and the pin and spring keep tension on the front of the cam to avoid this.
That's about the best I can explain it.
Quote:
Originally Posted by Zazoos View Post
Hey Gang,

My Haynes manual shows a picture of a thrust pin and spring placed in the end of the cam gear bolt head. However, they only talk about the thrust pin in the 6 cylinder section. Does the 4 cylinder have a thrust pin and spring? What is the purpose of the thrust pin?

Thanks,
Zazoos
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Unread 01-21-2010, 02:40 PM   #3
hotelconucc93
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2010 YJ Wrangler 
 
Join Date: Jun 2008
Location: Chesterfield, VA, VA
Posts: 753
With my 4.0, I6 242, how does one place the spring and pin and install the cover without it all falling apart?
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