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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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Stant 12452 - STN12452 Replacement Rubber Gasket

Stant 12452 Replacement Rubber Gasket - STN12452

List Price: $1.35
: $1.05
Stant STN12553 CHECK VALVE (PT255-3)

Check Valve PT255-3

List Price: $1.73
: $1.35
Stant 12703 - STN12703 ST270 Head Repair Kit

Stant 12703 Head Repair Kit use w/12270 Pressure Tester - STN12703

List Price: $2.95
: $2.30
Thexton THX101 ANTIFREEZE TESTER ETHYLENE GLYCOL POCKET TYPE

Cold-Chek® Anti-Freeze Coolant Tester

List Price: $6.99
: $4.67
Thexton THX102 Cold-Chek® Professional Anti-Freeze Coolant Tester

Thexton 102 Cold-Chek® Professional Anti-Freeze Coolant Tester - THX102

List Price: $8.59
: $5.70
K Tool International KTI70211 ANTIFREEZE TESTER

Antifreeze Tester

List Price: $8.18
: $5.84
Thexton THX100 ANTIFREEZE TESTER PROPYLENE GLYCOL POCKET TYPE

Cold-Chek® Propylene Glycol Anti-Freeze and Coolant Tester

List Price: $9.00
: $5.84
E-Z Red EZRS102 ANTI FREEZE HYDROMETER

Antifreeze Hydrometer

List Price: $9.98
: $7.01
Lisle Radiator Cap Wrench for GM LIS24700 Radiator Cap Wrench for GM

Lisle Radiator Cap Wrench for GM LIS24700

List Price: $9.29
: $7.59
Environmental Test System COO311519 TEST COOLANT STRIP 50/TUBE

CoolTrak® Coolant Test Strip - 50 Per Bottle

List Price: $12.00
: $8.30
ATD Tools Radiator Hose Pinch-Off Pliers ATD-5380 Radiator Hose Pinch-Off Pliers

ATD Tools Radiator Hose Pinch-Off Pliers ATD-5380

List Price: $13.39
: $8.73
Vim Products VIMV410 DRAIN PLUG SOC

"VW" Drain Plug Tool

List Price: $12.95
: $9.24
Thexton 485 - THX485 Radiator Petcock Socket Set

Thexton 485 Radiator Petcock Socket Set - THX485

List Price: $12.39
: $10.05
Thexton THX106 ANTIFREEZE TESTER ETHYLENE GLYCOL DISC TYPE

Cold-Chek® Disc-Type Anti-Freeze Tester

List Price: $14.69
: $12.04
Thexton THX107 ANTIFREEZE TESTER PROPYLENE GLYCOL DISC TYPE

Cold-Chek® Propylene Glycol Anti-Freeze and Coolant Tester

List Price: $14.69
: $12.04
K Tool International 71103  - KTI71103 2 Piece Flexible Line Clamp Set

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

List Price: $17.91
: $14.67
Schley Products, Inc SCH91900 RADIATOR DRAIN PLUG SOCKET

Radiator Drain Plug Socket

List Price: $19.95
: $16.34
Lisle 22500 - LIS22500 Extended Thermostat Gasket Remover

Lisle 22500 Extended Thermostat Gasket Remover - LIS22500

List Price: $23.49
: $19.04
Stant STN12704 HEAD REPLACEMENT FOR 12270 W/HOSE

Head Replacement for 12270 w/Hose

List Price: $27.99
: $21.83
Plews PLW75-025 RADIATOR FILLER 3 GAL. PLASTIC

3 Gallon Plastic Radiator Filler

List Price: $39.74
: $21.87
Stant STN12027 32MM ID FILLER ADAPTER(PTTA2

32mm ID Filler Adapter  PTTA2

List Price: $32.01
: $24.97
Assenmacher ASSFZ36 CAP ADAPTER 99 & NEWER

Radiator Cap Adapter

List Price: $37.94
: $25.73
Assenmacher ASSFZ22 RADIATOR ADAPTER VOLKSWAGEN

Volkswagen & Audi Radiator Adapter

List Price: $37.31
: $27.30
Assenmacher ASSFZ25 RADIATOR ADAPTER VOLVO

Volvo & Saab Radiator Adapter

List Price: $37.31
: $27.30
Stant 12701 - STA-12701 Update Kit for ST255 Pressure Tester

Stant 12701 Update Kit for ST255 Pressure Tester - STA-12701

List Price: $33.99
: $27.79
Lisle Water Pump Sprocket Holder for GM Ecotec LIS13800 Water Pump Tool for Ecotec

Lisle Water Pump Sprocket Holder for GM Ecotec LIS13800

List Price: $38.49
: $30.53
Stant STN12450 TRUCK RADIATOR ADPT KIT (PTA45

Truck Radiator Adapter Set

List Price: $45.87
: $31.58
OTC GM Water Pump Holding Tool OTC6616 Water Pump Holding Tool

OTC GM Water Pump Holding Tool OTC6616

List Price: $46.49
: $36.83
Assenmacher ASSFZ41 RADIATOR ADAPTER AUDI

Audi Radiator Adapter

List Price: $53.17
: $37.33
Assenmacher FZ 35 A - ASSFZ35A Cooling System Adapter

Assenmacher FZ 35 A Cooling System Adapter - ASSFZ35A

List Price: $53.18
: $37.33
Assenmacher ASSBMW345 RADIATOR PRESSURE ADAPTER BMW

BMW Radiator Pressure Adapter

List Price: $53.29
: $37.43
ATD Tools Hose Pinch-Off Pliers ATD-5465 Hose Pinch-Off Pliers

ATD Tools Hose Pinch-Off Pliers ATD-5465

List Price: $53.99
: $37.93
Assenmacher BMW Tank Adapter ASSBMW350 BMW Tank Adapter

Assenmacher BMW Tank Adapter ASSBMW350

List Price: $52.79
: $38.00
Assenmacher ASSFZ128 RADIATOR ADAPTER TOYOTA

Cooling System Adapter

List Price: $55.32
: $39.16
Assenmacher ASSFZ138 RADIATOR ADAPTER TOYOTA SUPRA

Cooling System Adapter

List Price: $55.32
: $39.16
Mityvac MV4560 - MITMV4560 Radiator / Cooling System Pressure Test Kit

Mityvac MV4560 Radiator/Cooling System Pressure Test Kit - MITMV4560

List Price: $64.60
: $45.95
Lisle Heater Hose Coupler Repair Kit LIS62450 Heater Hose Coupler Remover Kit

Lisle Heater Hose Coupler Repair Kit LIS62450

List Price: $56.99
: $46.20
ATD Tools Coolant Refractometer ATD-3705 Coolant Refractometer

ATD Tools Coolant Refractometer ATD-3705

List Price: $62.99
: $46.79
KD Tools KDT3950 2PC 6.0L POWERSTROKE FAN CLUTCH KIT

2 Piece 6.0L Powerstroke Fan Clutch Kit

List Price: $62.99
: $51.47
Robinair 75240 - ROB75240 Coolant and Battery Refractometer

Robinair 75240 Coolant and Battery Refractometer - ROB75240

List Price: $69.99
: $59.25
   
 

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.