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Roadside Jerry
Roadside Jerry, Auto Mechanic
Category: Car
Satisfied Customers: 2948
Experience:  Auto Mehanic 39 years,30 with the NYPD Fleet Service Division
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What causes the coolant bottle to crack and leak coolant

Resolved Question:

2005 Land Rover Range Rover HSE with 81,570 miles.
Submitted: 8 years ago.
Category: Car
Expert:  Roadside Jerry replied 8 years ago.
Has the replacement bottle failed? Is the engine running hot?
Customer: replied 8 years ago.
The replacement bottle failed in the exact spot as the first but the enhine is not running hot.
Expert:  Roadside Jerry replied 8 years ago.
The two items that will need to be checked are the pressure cap,make sure it is releasing the prssure at the specified PSI as indicated on the cap. This needs to be tested with a radiator/pressue cap tester. The other thing to check,is the tank being stressed when it is mounted to the truck,causing it to crack in the same area.graphic
Customer: replied 8 years ago.
Not sure if I mentioned that the expansion tank is separate from the radiator and connected by 3 hoses and the tank itself is is what is leaking. Also not sure if the cap to the expansion tank (bottle) is pressurised
Expert:  Roadside Jerry replied 8 years ago.
Hi, the tank is under pressure the same as the rest of the cooling sytem, it is not just an overflow bottle as was used on older model cars. If the pressure is going to high,the tank can crack since it is the weakest part in the system.
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