One Cooling-System Cart, Three Jobs: Pressure Test, Vacuum Hold, Refill
Separate three related jobs—cold pressure testing, vacuum holding and vacuum refill—before choosing one kit or cart.
Tag AUTOOL SC301
How to Use the AUTOOL SC301 Cooling System Tester and Filler
The AUTOOL SC301 is a 2-in-1 automotive cooling system tester and coolant vacuum filler for cooling system vacuuming, coolant filling, and pressure leak detection. It uses vacuum extraction and pressure-holding detection to help users check cooling system sealing, remove air…
BMW 528 B48 Coolant Loss: Oil Filter Housing and Pipe Connector Repair
A BMW 528 with a B48 engine and 130,000 km repeatedly requested coolant but left no obvious puddle. Pressure loss and dried coolant traces led beneath the intake area to two confirmed leak points: the oil-filter-housing interface and a cracked cylinder-block coolant-pipe connector. Both were repaired before vacuum filling, bleeding, a 20 km road test, and a dry recheck; the page/video model-year conflict is disclosed rather than resolved by guesswork.
2020 Mercedes GLE 350 Coolant Loss: Side-Pipe Replacement Case
Pink residue on a 2020 GLE 350 led to a leaking molded side pipe near the turbocharger. The applicable stainless-steel replacement passed the reported 15-minute sealing check.
2015 Mercedes C180 Coolant Loss: Thermostat-Housing Leak Repair Case
A W205 C180 had repeated coolant warnings, a parking stain and coolant odor. Fresh leakage at the thermostat-housing seam confirmed the fault before assembly replacement and verification.
2014 BMW 525Li Overheating: Corroded Water-Pump Connector and Heater-Valve Leak
A 220,000 km BMW 525Li had intermittent overheating. Diagnosis found a coolant-damaged water-pump connector and a second heater-valve leak; both repairs passed a 20 km road test.
2017 Mercedes GLC 300 M274: Belt-Drive Repair and Preventive Thermostat Case
A 140,000 km GLC 300 had cold-start rustling, a cracked belt, weak tensioner action and rough pulleys. The drive was repaired; thermostat work was recorded separately as preventive maintenance.
2019 Mercedes E300 Red Coolant Warning: Cracked Bypass Pipe Repair Case
A 2019 E300 with 120,000 km displayed a red stop-engine coolant warning. Pink residue led to a cracked bypass pipe; replacement, bleeding and a 30 km road test completed the repair.
Coolant Leak Near the Water Pump? Diagnose Before Replacement
Coolant near a water pump does not prove pump failure. Use a cold inspection, bounded vacuum-hold test, repair boundary, vacuum fill and verification.