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Cooling System Diagnostics

If you need great cooling system parts or diagnostic tools, you’re on the right page. We also offer a large selection of stant radiator pressure tester adapters. We want to make sure that you have everything that you need to keep your vehicle running smoothly and safely.

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Replacement Rubber Gasket CHECK VALVE (PT255-3)
List Price: $1.35
: $1.08
List Price: $1.73
: $1.39
Stant 12452 - STN12452 Stant STN12553
Stant 12452 Replacement Rubber Gasket - STN12452 Check Valve PT255-3
ST270 Head Repair Kit ANTIFREEZE TESTER ETHYLENE GLYCOL POCKET TYPE
List Price: $2.95
: $2.37
List Price: $6.99
: $4.81
Stant 12703 - STN12703 Thexton THX101
Stant 12703 Head Repair Kit use w/12270 Pressure Tester - STN12703 Cold-Chek® Anti-Freeze Coolant Tester
Cold-Chek® Professional Anti-Freeze Coolant Tester ANTIFREEZE TESTER
List Price: $8.59
: $5.87
List Price: $8.18
: $6.01
Thexton THX102 K Tool International KTI70211
Thexton 102 Cold-Chek® Professional Anti-Freeze Coolant Tester - THX102
Antifreeze Tester
ANTIFREEZE TESTER PROPYLENE GLYCOL POCKET TYPE ANTI FREEZE HYDROMETER
List Price: $9.00
: $6.01
List Price: $9.78
: $6.93
Thexton THX100 E-Z Red EZRS102
Cold-Chek® Propylene Glycol Anti-Freeze and Coolant Tester Antifreeze Hydrometer
DRAIN PLUG SOC Radiator Cap Wrench for GM
List Price: $10.59
: $8.42
List Price: $10.45
: $8.45
Vim Products VIMV410 Lisle Radiator Cap Wrench for GM LIS24700
"VW" Drain Plug Tool Lisle Radiator Cap Wrench for GM LIS24700
TEST COOLANT STRIP 50/TUBE Radiator Hose Pinch-Off Pliers
List Price: $12.00
: $8.54
List Price: $12.99
: $8.99
Environmental Test System COO311519 ATD Tools Radiator Hose Pinch-Off Pliers ATD-5380
CoolTrak® Coolant Test Strip - 50 Per Bottle ATD Tools Radiator Hose Pinch-Off Pliers ATD-5380
Radiator Petcock Socket Set ANTIFREEZE TESTER ETHYLENE GLYCOL DISC TYPE
List Price: $15.99
: $10.83
List Price: $16.99
: $11.44
Thexton 485 - THX485 Thexton THX106
Thexton 485 Radiator Petcock Socket Set - THX485
Cold-Chek® Disc-Type Anti-Freeze Tester
ANTIFREEZE TESTER PROPYLENE GLYCOL DISC TYPE 2 Piece Flexible Line Clamp Set
List Price: $16.99
: $11.44
List Price: $17.91
: $15.11
Thexton THX107 K Tool International 71103  - KTI71103
Cold-Chek® Propylene Glycol Anti-Freeze and Coolant Tester

K Tool International 71103 2 Piece Flexible Line Clamp Set - KTI71103

RADIATOR DRAIN PLUG SOCKET Extended Thermostat Gasket Remover
List Price: $19.95
: $16.83
List Price: $24.45
: $18.42
Schley Products, Inc SCH91900 Lisle 22500 - LIS22500
Radiator Drain Plug Socket Lisle 22500 Extended Thermostat Gasket Remover - LIS22500
HEAD REPLACEMENT FOR 12270 W/HOSE RADIATOR FILLER 3 GAL. PLASTIC
List Price: $27.99
: $22.49
List Price: $39.74
: $22.52
Stant STN12704 Plews PLW75-025
Head Replacement for 12270 w/Hose 3 Gallon Plastic Radiator Filler
32MM ID FILLER ADAPTER(PTTA2 CAP ADAPTER 99 & NEWER
List Price: $32.01
: $25.71
List Price: $37.94
: $27.58
Stant STN12027 Assenmacher ASSFZ36
32mm ID Filler Adapter  PTTA2 Radiator Cap Adapter
Update Kit for ST255 Pressure Tester RADIATOR ADAPTER VOLKSWAGEN
List Price: $32.99
: $27.70
List Price: $36.94
: $27.82
Stant 12701 - STA-12701 Assenmacher ASSFZ22
Stant 12701 Update Kit for ST255 Pressure Tester - STA-12701
Volkswagen & Audi Radiator Adapter
RADIATOR ADAPTER VOLVO Water Pump Tool for Ecotec
List Price: $36.94
: $27.82
List Price: $39.95
: $30.35
Assenmacher ASSFZ25 Lisle Water Pump Sprocket Holder for GM Ecotec LIS13800
Volvo & Saab Radiator Adapter Lisle Water Pump Sprocket Holder for GM Ecotec LIS13800
TRUCK RADIATOR ADPT KIT (PTA45 Water Pump Holding Tool
List Price: $45.87
: $32.52
List Price: $50.95
: $37.10
Stant STN12450 OTC GM Water Pump Holding Tool OTC6616
Truck Radiator Adapter Set OTC GM Water Pump Holding Tool OTC6616
RADIATOR ADAPTER AUDI Cooling System Adapter
List Price: $52.64
: $38.07
List Price: $52.65
: $38.07
Assenmacher ASSFZ41 Assenmacher FZ 35 A - ASSFZ35A
Audi Radiator Adapter Assenmacher FZ 35 A Cooling System Adapter - ASSFZ35A
BMW Tank Adapter Hose Pinch-Off Pliers
List Price: $52.27
: $38.74
List Price: $52.95
: $39.07
Assenmacher BMW Tank Adapter ASSBMW350 ATD Tools Hose Pinch-Off Pliers ATD-5465
Assenmacher BMW Tank Adapter ASSBMW350 ATD Tools Hose Pinch-Off Pliers ATD-5465
RADIATOR PRESSURE ADAPTER BMW RADIATOR ADAPTER TOYOTA
List Price: $52.76
: $39.16
List Price: $54.77
: $39.95
Assenmacher ASSBMW345 Assenmacher ASSFZ128
BMW Radiator Pressure Adapter Cooling System Adapter
RADIATOR ADAPTER TOYOTA SUPRA Radiator / Cooling System Pressure Test Kit
List Price: $54.77
: $39.95
List Price: $64.60
: $47.32
Assenmacher ASSFZ138 Mityvac MV4560 - MITMV4560
Cooling System Adapter Mityvac MV4560 Radiator/Cooling System Pressure Test Kit - MITMV4560
Heater Hose Coupler Remover Kit Coolant Refractometer
List Price: $63.95
: $47.66
List Price: $62.95
: $48.19
Lisle Heater Hose Coupler Repair Kit LIS62450 ATD Tools Coolant Refractometer ATD-3705

Lisle Heater Hose Coupler Repair Kit LIS62450

ATD Tools Coolant Refractometer ATD-3705
2PC 6.0L POWERSTROKE FAN CLUTCH KIT Coolant and Battery Refractometer
List Price: $83.36
: $50.36
List Price: $73.95
: $60.19
KD Tools KDT3950 Robinair 75240 - ROB75240
2 Piece 6.0L Powerstroke Fan Clutch Kit Robinair 75240 Coolant and Battery Refractometer - ROB75240
   
 

We also offer the perfect selection of tools to use in your auto shop or garage. Our prices are affordable, and we offer one of the largest selections of auto items around. However, we never skimp on quality.

We carry great options from brands that are known for crafting top-quality and reliable items. We only bring you items from trusted brands, because we want you to be able to get pieces that will last you for as long as you need them. We make it easy for you to get all of the cooling system parts and other items that you need for your shop or home with one purchase. All you have to do is create an order online, and we will ship all of your items straight to your shop or home.

Whether you need a head repair kit, a check valve, an antifreeze hydrometer, a drain plug socket, or a petcock socket set, we will have some great options to meet your needs. Each of our items has a convenient description to help you understand its specifications.

If you feel overwhelmed by our inventory of cooling system parts and Stant radiator pressure tester adapters, or if you are not sure which items are right for your auto shop or home garage, let us help you. Our dedicated staff members are always happy to assist you in finding the perfect items for your needs. Simply come into one of our locations or give us a call. With our top-notch products, friendly service, and affordable prices, there is no reason not to make Best Buy Automotive your first choice for your auto needs.