Semi Truck Engine Cooling

Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89493)
0
# mpn404091680
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89493) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$122.65
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89491)
0
# mpn404091679
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89491) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$101.42
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89482)
0
# mpn404091677
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine belt...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$121.42
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89469)
0
# mpn404091585
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89469) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$127.83
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89452)
0
# mpn404091584
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89452) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$141.37
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89448)
0
# mpn404091583
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89448) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$187.92
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89447)
0
# mpn404091582
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89447) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$172.12
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89446)
0
# mpn404091581
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89446) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$109.67
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89443)
0
# mpn404091580
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89443) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$128.97
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89440)
0
# mpn404091578
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine belt...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$179.74
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89431)
0
# mpn404091577
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89431) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$143.01
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89425)
0
# mpn404091576
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89425) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$121.75
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89497)
0
# mpn385429804
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89497) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$124.52
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89487)
0
# mpn385429800
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89487) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$132.16
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89485)
0
# mpn385429798
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89485) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$163.36
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89481)
0
# mpn385429795
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89481) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$129.56
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89480)
0
# mpn385429794
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89480) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$183.04
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89479)
0
# mpn385429793
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89479) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$125.62
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89474)
0
# mpn385429790
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89474) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$97.91
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89473)
0
# mpn385429789
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89473) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$94.03
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89460)
0
# mpn385429726
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89460) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$142.04
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89455)
0
# mpn385429721
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89455) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$109.28
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89445)
0
# mpn385429716
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89445) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$99.66
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89444)
0
# mpn385429715
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89444) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$109.13
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89441)
0
# mpn385429714
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89441) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$150.02
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89436)
0
# mpn385429710
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89436) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$151.37
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89419)
0
# mpn385429698
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89419) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$138.60
Dayco®No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89418)
0
# mpn385429697
No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89418) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$292.13
Dayco®No Slack™ Heavy Duty Mechanical Automatic Belt Tensioner Assembly (89490)
0
# mpn385429801
No Slack™ Heavy Duty Mechanical Automatic Belt Tensioner Assembly (89490) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$118.59
Dayco®No Slack™ Heavy Duty New Design Automatic Belt Tensioner Assembly (89484)
0
# mpn385429797
No Slack™ Heavy Duty New Design Automatic Belt Tensioner Assembly (89484) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on...
Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
$109.82

To run safely and efficiently, the operating temperature of your semi truck's engine must be maintained within a very narrow range. For this reason, your big rig is equipped with a radiator, radiator fan, water pump and other specific parts, which all together form a cooling system. Contrary to popular belief, a cooling system does not only prevent the engine from overheating, but also makes it possible to significantly improve its warm-up time, resulting in reduced fuel consumption. Take care of your cooling system and use only premium replacement and aftermarket semi truck engine cooling products we carry, and your engine will never get overheated.