Cooling Systems - Thermostats

140 Degree Brass Hi-flow Marine Thermostat
Your Price:
$39.99

120 Degree Brass Hi-flow Marine Thermostat

540-160110

120 Degree Brass Hi-flow Marine Thermostat

These hi-flow brass marine thermostats feature air relief ports. This enables relief of the steam pockets caused by cold water entering a heated engine block. Their hi-flow design helps to maintain a constant operating temperature. Don't trust your engine to anything less!


Polished Stainless Ford 429, 460 Thermostat Kit
Your Price:
$169.99

Polished Stainless Ford 429, 460 Thermostat Kit

540-160465

  • Fits Ford 429/460.
  • Made from Polished 316L Stainless Steel!
  • Designed for use on cold water source cooling systems.
  • Keeps engine temperature between 140 & 160 degrees.
  • Not recommended for supercharged or turbocharged engines, or sandy conditions.
  • Includes thermostat housing, 2 Tee fittings, a 160 degree thermostat, valve, seat, & spring.
  • Housing is 4 inches long x 3-1/8" wide x 3" tall.
  • Housing has four 1/2" NPT ports.
  • Tee fittings are 1/2" NPT x Two 5/8" hose on the run.
  • Includes bolts and gaskets.

Polished Stainless Thermostat Kit For 455 Olds
Your Price:
$139.99

Polished Stainless Thermostat Kit For 455 Olds

540-160210

  • Fits 455 Olds applications
  • Made from Polished 316L Stainless Steel!
  • Designed for use on cold water source cooling systems.
  • Keeps engine temperature between 140 & 160 degrees.
  • Not recommended for supercharged or turbocharged engines, or sandy conditions.
  • Includes thermostat housing, 2 Tee fittings, a 160 degree thermostat, valve, seat, & spring.
  • Housing is 4 inches long x 3-1/8" wide x 3" tall.
  • Housing has four 1/2" NPT ports.
  • Tee fittings are 1/2" NPT x Two 5/8" hose on the run.
  • Includes bolts and gaskets.

Polished Stainless Thermostat Kit For Chevy
Your Price:
$139.99

Polished Stainless Thermostat Kit For Chevy

540-160200

  • Fits most BBC, SBC applications
  • Made from Polished 316L Stainless Steel!
  • Designed for use on cold water source cooling systems.
  • Keeps engine temperature between 140 & 160 degrees.
  • Not recommended for supercharged or turbocharged engines, or sandy conditions.
  • Includes thermostat housing, 2 Tee fittings, a 160 degree thermostat, valve, seat, & spring.
  • Housing is 4 inches long x 3-1/8" wide x 3" tall.
  • Housing has four 1/2" NPT ports.
  • Tee fittings are 1/2" NPT x Two 5/8" hose on the run.
  • Includes bolts and gaskets.

120 Degree Brass Hi-Flow Marine Thermostat - For 496/525 Engines
Your Price:
$69.99

120 Degree Brass Hi-Flow Marine Thermostat - For 496/525 Engines

540-160112

120 Degree Brass Hi-Flow Marine Thermostat - For 496/525 Engines

These Hi-Flow brass marine thermostats feature air relief parts. This enables steam pockets caused by cold water entering a heated engine block. Their hi-flow design help to maintain the most constant temperature. Don’t trust your engine to anything less.


140 Degree Brass Hi-flow Marine Thermostat
Your Price:
$39.99

140 Degree Brass Hi-flow Marine Thermostat

540-160106

140 Degree Brass Hi-flow Marine Thermostat

These hi-flow brass marine thermostats feature air relief ports. This enables relief of the steam pockets caused by cold water entering a heated engine block. Their hi-flow design helps to maintain a constant operating temperature. Don't trust your engine to anything less!


160 Degree Brass Hi-flow Marine Thermostat
Your Price:
$29.99

160 Degree Brass Hi-flow Marine Thermostat

540-160101

160 Degree Brass Hi-flow Marine Thermostat

These hi-flow brass marine thermostats feature air relief ports. Thisenables relief of the steam pockets caused by cold water entering a heatedengine block. Their hi-flow design helps to maintain a constant operatingtemperature. Don't trust your engine to anything less!


180 Degree Brass Hi-flow Marine Thermostat
Your Price:
$24.99

180 Degree Brass Hi-flow Marine Thermostat

540-160108

180 Degree Brass Hi-flow Marine Thermostat

These hi-flow brass marine thermostats feature air relief ports. Thisenables relief of the steam pockets caused by cold water entering a heatedengine block. Their hi-flow design helps to maintain a constant operatingtemperature. Don't trust your engine to anything less!


Thermostat
Your Price:
$13.99

Thermostat

676-18-3552

Additional Details:

  • Temperature Rating: 160°F
  • For: Fresh Water Cooling
  • Fits: 470/485 models (s/n 6218036 and below)

Use With:

Interchanges/Replaces

Crusader

  • 96358

GLM

  • 13050

Mallory

  • 9-43000

Mercruiser Stern Drive

  • 76270
  • 76270T

Thermostat
Your Price:
$14.99

Thermostat

676-18-3555

Additional Details:

  • Temperature Rating: 160°F
  • Fits: 1998 & newer GM V-6 & V-8 engines with closed cooling

Use With:

Interchanges/Replaces

GLM

  • 13040

Mallory

  • 9-43001
  • 9-43016

Mercruiser Stern Drive

  • 991551
  • 99155A1
  • 99155T2

Thermostat
Your Price:
$20.99

Thermostat

676-18-3649

Additional Details:

  • Temperature Rating: 160°
  • For: Fresh Water Cooling
  • Fits: 1987 & newer GM engines with standard cooling requiring a 160° thermostat

Use With:

Interchanges/Replaces

Crusader

  • 97895

GLM

  • 13100

Mallory

  • 9-43002

Mercruiser Stern Drive

  • 8052732
  • 8072522
  • 807252T2
  • 8M0091470
  • 8M0109441

Thermostat
Your Price:
$18.99

Thermostat

676-18-3550

Additional Details:

  • Temperature Rating: 140°F
  • Fits: MerCruiser 120/2.5L (s/n 2324347 & Up) w/cast iron exhaust manifolds
  • Fits: Mercruiser 140-3.0L (s/n 0L340999 & below) and 165

Use With:

Interchanges/Replaces

Chrysler/Force/US Marine

  • F84068
  • F84068-1
  • F84068-2
  • F85068-2

GLM

  • 13020

Mallory

  • 9-43020

Mercruiser Stern Drive

  • 59078
  • 59078A1
  • 59078B

Thermostat
Your Price:
$16.99

Thermostat

676-18-3554

Additional Details:

  • Temperature Rating: 160°

Use With:

Interchanges/Replaces

GLM

  • 13060

Mallory

  • 9-43021

OMC Inboard

  • 383307

OMC Stern Drive

  • 379754
  • 383307
  • 3852216
  • 3856961

Volvo Penta

  • 3856961

Thermostat
Your Price:
$19.99

Thermostat

676-18-3557

Additional Details:

  • Temperature Rating: 143°F (62° C)
  • Fits: MCM GM in-line 6 cyl.

Use With:

Interchanges/Replaces

Chrysler/Force/US Marine

  • F335068

GLM

  • 13080

Johnson/Evinrude Outboard

  • 382385
  • 396987

Mallory

  • 9-43024

Mercruiser Stern Drive

  • 47594

Volvo Penta

  • 21148403

Thermostat Kit
Your Price:
$21.99

Thermostat Kit

676-18-3676

Key Features:

  • For: 7.4L (1994-98), 8.2L (1998)

Additional Details:

  • Temperature Rating: 140° (60 C)
  • Thermostat: 0986506, 3853983

Interchanges/Replaces

Mallory

  • 9-43026

OMC Stern Drive

  • 3853983 + 312797 + 307239

Volvo Penta

  • 3853983 + 3852071 + 835417

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-7170Chrysler/Force/US Marine
  • 25-33504
GLM
  • 82200
Johnson/Evinrude Outboard
  • 307239
Mallory
  • 9-76502
Mercruiser Stern Drive
  • 25-33504
Mercury Marine
  • 25-33504
OMC Stern Drive
  • 307239
  • 3852071
Volvo Penta
  • 3852071
1O-Ring N/A
18-0398GLM
  • 35060
Mallory
  • 9-60009
Mercruiser Stern Drive
  • 27-33918
  • 27-8M2021920
OMC Stern Drive
  • 312797
  • 3852111
Volvo Penta
  • 3852111
  • 835417
  • 856347
1Thermostat Gasket N/A
NSSVolvo Penta
  • 3853983
1ThermostatNo ImageN/A

Thermostat Kit
Your Price:
$20.99

Thermostat Kit

676-18-3677

Additional Details:

  • Temperature Rating: 160°F (71°C)

Interchanges/Replaces

Mallory

  • 9-43028

Volvo Penta

  • 3856961 + 835417 + 3852071

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-7170Chrysler/Force/US Marine
  • 25-33504
GLM
  • 82200
Johnson/Evinrude Outboard
  • 307239
Mallory
  • 9-76502
Mercruiser Stern Drive
  • 25-33504
Mercury Marine
  • 25-33504
OMC Stern Drive
  • 307239
  • 3852071
Volvo Penta
  • 3852071
1O-Ring N/A
18-0398GLM
  • 35060
Mallory
  • 9-60009
Mercruiser Stern Drive
  • 27-33918
  • 27-8M2021920
OMC Stern Drive
  • 312797
  • 3852111
Volvo Penta
  • 3852111
  • 835417
  • 856347
1Thermostat Gasket N/A
18-3554GLM
  • 13060
Mallory
  • 9-43021
OMC Inboard
  • 383307
OMC Stern Drive
  • 379754
  • 383307
  • 3852216
  • 3856961
Volvo Penta
  • 3856961
1Thermostat N/A

Thermostat Kit
Your Price:
$15.99

Thermostat Kit

676-18-3668

Additional Details:

  • Temperature Rating: 142°F
  • Fits: 1983 & newer GM V-6 & V-8 engines with standard cooling

Interchanges/Replaces

GLM

  • 13390

Mallory

  • 9-43150

Mercruiser Stern Drive

  • 807252Q4
  • 807252T4
  • 807252T7

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2552GLM
  • 31670
Mallory
  • 9-60008
Mercruiser Stern Drive
  • 27-331791
  • 27-331792
  • 27-33179B2
1Thermostat Cover Gasket N/A
18-2553GLM
  • 31460
Mallory
  • 9-60005
Mercruiser Stern Drive
  • 27-47510
  • 27-47510Q
Osco
  • 47510
1Thermostat Cover Gasket N/A
18-2554GLM
  • 31630
Mallory
  • 9-60006
Mercruiser Stern Drive
  • 27-41812
  • 27-41812B
  • 27-41812Q
  • 27-90556
Osco
  • 41812
1Thermostat Cover Gasket N/A
18-2917GLM
  • 31560
GM
  • 3701777
Mallory
  • 9-60007
  • 9-60007-10
Mercruiser Stern Drive
  • 27-33179
  • 27-53045
  • 27-530451
  • 27-53045B1
  • F10077105
  • FI1101276
  • FI1101291
  • FI5000096
OMC Inboard
  • 3701777
OMC Stern Drive
  • 3701777
1Thermostat Gasket N/A
18-3551Chrysler Inboard
  • 4142885
Crusader
  • 96319
GLM
  • 13030
Mallory
  • 9-43013
Mercruiser Stern Drive
  • 32728
  • 35884
  • 59137
  • 59137A1
  • 67464
  • 8052731
  • 8072521
  • 807252T1
  • 8M0089715
Osco
  • 143-DEG
Pleasurecraft
  • RO26002E
1Thermostat N/A
18-7173Chrysler/Force/US Marine
  • 25-30224
GLM
  • 82250
Johnson/Evinrude Outboard
  • 310327
Mallory
  • 9-76501
Mercruiser Stern Drive
  • 25-30224
  • 25-30224Q
Mercury Marine
  • 25-27018
  • 25-30224
  • 25-30224Q
OMC Stern Drive
  • 310327
1O-Ring N/A

Thermostat Kit
Your Price:
$21.99

Thermostat Kit

676-18-3646

Key Features:

  • 140°F

Additional Details:

  • Fits: 1982 & older Ford & GM V-8 engines w/standard cooling & 1996 & older hi-performance models
  • Fits: engines with closed cooling

Interchanges/Replaces

GLM

  • 13380

Mallory

  • 9-43151

Mercruiser Stern Drive

  • 807252Q3
  • 807252T6

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2553GLM
  • 31460
Mallory
  • 9-60005
Mercruiser Stern Drive
  • 27-47510
  • 27-47510Q
Osco
  • 47510
1Thermostat Cover Gasket N/A
18-2834Barr
  • MC472760208
GLM
  • 31620
Mallory
  • 9-60011
Mercruiser Stern Drive
  • 27-60208
1Thermostat Cover Gasket N/A
18-2844Barr
  • MC472748818
GLM
  • 31510
Mallory
  • 9-60010
Mercruiser Stern Drive
  • 27-48818
  • 27-488181
  • 27-48818Q01
1Thermostat Gasket N/A
18-2917GLM
  • 31560
GM
  • 3701777
Mallory
  • 9-60007
  • 9-60007-10
Mercruiser Stern Drive
  • 27-33179
  • 27-53045
  • 27-530451
  • 27-53045B1
  • F10077105
  • FI1101276
  • FI1101291
  • FI5000096
OMC Inboard
  • 3701777
OMC Stern Drive
  • 3701777
1Thermostat Gasket N/A
18-3551Chrysler Inboard
  • 4142885
Crusader
  • 96319
GLM
  • 13030
Mallory
  • 9-43013
Mercruiser Stern Drive
  • 32728
  • 35884
  • 59137
  • 59137A1
  • 67464
  • 8052731
  • 8072521
  • 807252T1
  • 8M0089715
Osco
  • 143-DEG
Pleasurecraft
  • RO26002E
1Thermostat N/A

Thermostat Kit
Your Price:
$16.99

Thermostat Kit

676-18-3651

Additional Details:

  • Temperature Rating: 142°F

Interchanges/Replaces

GLM

  • 13380

Mallory

  • 9-43152

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2553GLM
  • 31460
Mallory
  • 9-60005
Mercruiser Stern Drive
  • 27-47510
  • 27-47510Q
Osco
  • 47510
1Thermostat Cover Gasket N/A
18-2554GLM
  • 31630
Mallory
  • 9-60006
Mercruiser Stern Drive
  • 27-41812
  • 27-41812B
  • 27-41812Q
  • 27-90556
Osco
  • 41812
1Thermostat Cover Gasket N/A
18-2834Barr
  • MC472760208
GLM
  • 31620
Mallory
  • 9-60011
Mercruiser Stern Drive
  • 27-60208
1Thermostat Cover Gasket N/A
18-2844Barr
  • MC472748818
GLM
  • 31510
Mallory
  • 9-60010
Mercruiser Stern Drive
  • 27-48818
  • 27-488181
  • 27-48818Q01
1Thermostat Gasket N/A
18-3551Chrysler Inboard
  • 4142885
Crusader
  • 96319
GLM
  • 13030
Mallory
  • 9-43013
Mercruiser Stern Drive
  • 32728
  • 35884
  • 59137
  • 59137A1
  • 67464
  • 8052731
  • 8072521
  • 807252T1
  • 8M0089715
Osco
  • 143-DEG
Pleasurecraft
  • RO26002E
1Thermostat N/A

Thermostat Kit
Your Price:
$17.99

Thermostat Kit

676-18-3650

Additional Details:

  • Temperature Rating: 140° F
  • Fits: 1998 & older MCM GM in-line 4 & 6 cyl. engines

Interchanges/Replaces

GLM

  • 13370

Mallory

  • 9-43153

Mercruiser Stern Drive

  • 59078T3

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2831Barr
  • MC472747590
GLM
  • 31430
Mallory
  • 9-60012
Mercruiser Stern Drive
  • 27-47590
  • 27-475901
  • 27-47590B1
1Thermostat Cover Gasket N/A
18-3550Chrysler/Force/US Marine
  • F84068
  • F84068-1
  • F84068-2
  • F85068-2
GLM
  • 13020
Mallory
  • 9-43020
Mercruiser Stern Drive
  • 59078
  • 59078A1
  • 59078B
1Thermostat N/A