Which pulley bearing goes out first 5.7 Hemi ?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
Are the plastic idler pulley’s better than the stamped metal pulleys from the 3 Generation trucks ?
Same bearings I’m assuming.

FF779733-5F5F-44CD-8658-C79B9564BB04.jpeg679B33C3-200A-4352-8448-F4CF86E89AA5.jpeg
 

hemihustlin

Senior Member
Joined
Jul 23, 2013
Posts
1,553
Reaction score
915
Location
Montreal
Ram Year
2021
Engine
5.7 HEMI
I dont remember which idler went out first on my 06 ram hemi but I do remember the originals were metal and the replacements I bought at napa were plastic
also another time when I replaced the tensioner assembly I bought a continental branded version at Canadian tire (was the cheapest good quality one I could find at the time) and I noticed on the box it said made in Canada so I was quite happy
when I removed the original tensioner assembly it had the exact same markings and also said made in Canada so then I was super happy!
 
OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
I dont remember which idler went out first on my 06 ram hemi but I do remember the originals were metal and the replacements I bought at napa were plastic
also another time when I replaced the tensioner assembly I bought a continental branded version at Canadian tire (was the cheapest good quality one I could find at the time) and I noticed on the box it said made in Canada so I was quite happy
when I removed the original tensioner assembly it had the exact same markings and also said made in Canada so then I was super happy!
Can you post the part number you used ?
 

hemihustlin

Senior Member
Joined
Jul 23, 2013
Posts
1,553
Reaction score
915
Location
Montreal
Ram Year
2021
Engine
5.7 HEMI
OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
The pulleys that are plastic (nylon filled) have a factory sealed lip on one side and the bearing sits inside a formed ridge of about 1 or 2mm

This does not look as a ( pressed ) reusable but single use pulley but , the metal pulleys look to be reusable I’ll be able to justify my comparison when I can inspect a metal idler pulley this week.
 

crackerjack1957

Senior Member
Joined
Sep 26, 2015
Posts
2,042
Reaction score
2,439
Ram Year
2014 Sport 1500 CC 4x4
Engine
Hemi 5.7...65RFE...4.56
The pulleys that are plastic (nylon filled) have a factory sealed lip on one side and the bearing sits inside a formed ridge of about 1 or 2mm

This does not look as a ( pressed ) reusable but single use pulley but , the metal pulleys look to be reusable I’ll be able to justify my comparison when I can inspect a metal idler pulley this week.
**24 is only $12 so why not replace pulley vs bearing in metal pulley?
I posted both #'s because tensioner could be good but not pulley/bearing
 
OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
**24 is only $12 so why not replace pulley vs bearing in metal pulley?
I posted both #'s because tensioner could be good but not pulley/bearing
I’m not a advocate of disposable parts, with that being said I don’t think removing seals to re-grease bearings for critical belt driven components is prudent, but many people swear to it’s practically so personally it’s just a matter of preference.
I’d rather replace a shielded bearing with an upgrade than go with an economical solution… not exactly disposable because I’m reusing the pulley and in this instance I will soon know if a metal pulley is an upgrade from the current nylon plastic.
 
Last edited:

crackerjack1957

Senior Member
Joined
Sep 26, 2015
Posts
2,042
Reaction score
2,439
Ram Year
2014 Sport 1500 CC 4x4
Engine
Hemi 5.7...65RFE...4.56
I’m not a advocate of disposable parts, with that being said I don’t think removing seals to re-greasing bearings for critical belt driven components is prudent, but many people swear to it’s practically so personally it’s just a matter of preference.
I’d rather replace a shielded bearing with an upgrade than go with an economical solution… not exactly disposable because I’m reusing the pulley and in this instance I will soon know if a metal pulley is an upgrade from the current nylon plastic.


 
OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
Last edited:
OP
OP
Mister Luck

Mister Luck

cassis tutissima virtus
Joined
Aug 25, 2020
Posts
1,651
Reaction score
584
Location
WEST COAST
Ram Year
2016/2017
Engine
5.7 V8
I discovered why the later year tensioner pulleys have moulded fins…
6:10 / 27:16
…six minutes into the video
Ray removes pulley.
 
Top