3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Gino's Garage Parts

Old 01-12-2019, 07:52 AM
Registered User
Thread Starter
AUGIE DOG's Avatar
Join Date: Oct 2006
Location: APEX,NC
Posts: 465
Received 0 Likes on 0 Posts
Gino's Garage Parts

I need a new thermostat on my 07 5.9 and have been told multiple times DO NOT USE AFTER MARKET THERMOSTAT! Well Geno's has a Gates t-stat for $16+ but it's not an OEM Cummins part. Has anyone used this t-stat and is it equal to OEM?
AUGIE DOG is offline  
Old 01-12-2019, 03:08 PM
Registered User
NJTman's Avatar
Join Date: Dec 2010
Location: Land of the Toxic Avenger
Posts: 6,115
Received 1,249 Likes on 857 Posts
I wouldn't use an aftermarket t stat. In the first gen series 5.9, The Cummins t stat is redesigned with two poppet valves in it because of cavitation and air bound issues. Check with Cummins regarding the 3rd gen having the same issue,or not.

It lasts years longer than the chino market ones.

Edit: they're called jiggle pins, not poppet valves.
NJTman is offline  
Old 01-12-2019, 05:24 PM
Registered User
Spooler's Avatar
Join Date: Jan 2006
Location: Claxton, GA
Posts: 5,898
Likes: 0
Received 4 Likes on 3 Posts
Stick with the Cummins one.
Spooler is offline  
Old 01-13-2019, 10:22 AM
Registered User
KATOOM's Avatar
Join Date: Jan 2003
Location: The "real" Northern CA
Posts: 4,035
Received 61 Likes on 54 Posts
This is a well discussed topic... Some say the only thermostat worth having is the OEM one. Some say that they're not worth the high price for OEM and the cheaper parts store versions work fine. That said, I have a NAPA thermostat. Its been in there so long that I cant remember what brand it was either. But I do know that it works perfect and has the jiggle pins...and thats the part you want to be sure of. The Cummins engine needs those jiggle pins.
Other than that, Geno's Garage is a great company and they stand behind their products. If I had to replace my thermostat again I would not have a problem trying their much less expensive thermostat, or simply getting one from NAPA again. Its up to you...
KATOOM is offline  
Related Topics
Thread Starter
Last Post
General Diesel Discussion
12-26-2015 09:36 AM
11-10-2009 08:03 PM
1st Gen. Ram - All Topics
12-15-2008 02:23 PM
10-17-2008 08:15 PM
Performance and Accessories 2nd gen only
07-19-2005 08:13 PM

Thread Tools
Search this Thread
Quick Reply: Gino's Garage Parts

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.