Serpentine Belt Tensioner - Watch Out For This

ron.dittmer

Member
Joined
Dec 21, 2009
Messages
59
Reaction score
19
Location
Dundee, IL
Just letting you know that a friend of mine works on a lot of Chrysler 3.7L engines including the Liberty. He says the serpentine belt tensioner spring (not the pulley itself) seems to be consistently breaking at around 60,000 miles. He suggests to replace it at 50,000 miles.

With 56,000 miles on our 2006 Liberty 3.7L, I replaced my belt tensioner as a precaution. It turns out one of the two pulleys on it was about to fail anyway. I bought the replacement at Autozone of which the one pulley was the wrong diameter. He got another pulley of the right diameter off the shelf and all was well.

I replaced the serpentine belt too.

The tensioner assembly looks like this. One pulley is stationary, the other pivots off the spring.
You must be registered for see images
 

nchorselover55

Full Access Member
Joined
Jan 31, 2008
Messages
120
Reaction score
0
Location
Cedar Point, NC
Sure hope mine keeps holding up... have 101k and still on original belt and tensioner. Manual calls for replacing belt at 120k.
 

Slugger103

Member
KJ Supporting Member
Joined
Sep 16, 2020
Messages
66
Reaction score
64
Location
SC
Mine is all original at 207K, so I guess I got lucky. However it is one of the parts I'm changing this week seeing how I needed to do the belt anyway. New one already sitting on my bench awaiting install.
 

tommudd

Moderator
Staff member
Moderator
Joined
Jul 14, 2005
Messages
19,773
Reaction score
1,305
Location
Southeastern Ohio
Mine is all original at 207K, so I guess I got lucky. However it is one of the parts I'm changing this week seeing how I needed to do the belt anyway. New one already sitting on my bench awaiting install.
stock one yet at 207,000 miles WOW
In that many miles I changed the ones on my 04 at least 4 times
 

Members online

No members online now.
Top