Discover the Secrets of Fixing a Radiator Cap That Refuses to Hold Pressure

When should I replace my radiator cap? What does the radiator cap really do anyway? These are common questions technicians will hear from ... The rubber just won't hold it anymore. If it's older than 5, grab a tester or replace it. Once they fully loose pressure than you are in real ... It's important to choose the right cap as the pressure will be individual to your system. ... Typically you won't need to replace a radiator cap ... So is this the cause of my overheating problem all this time. I guess every time I turn the car off it won't pull back coolant from the ... Don't the radiator caps hold the pressure? Maybe the cap is loose ... My problem is that I can drive my truck all day and it won't accumulate ... if your cap isn't holding pressure take off the cap (Make sure your engine is cooled and de-pressurized first!) and take a pair of needle nose ... Yes, the radiator cap needs to hold pressure or the coolant won't cool very well. ... r/MechanicAdvice - Need a quick fix on my coolant reservoir ... ... won't be long until those OE radiator caps are gone as well. ... When the radiator cap can't hold 18 lbs. of pressure the radiator ... When you remove the cap on the system, you're reducing the pressure immediately and your 220 degree coolant is allowed to boil all at once. All ... loose belt, loose hose clamp, strainer lid not tight.... If you still have the old cap and pressure tester, you can test the cap and see where ...