Just bought a 2001 mazda mpv coolant fluid was low refilled it & disappeared (no leak under car, etc) car temp went up to H and the cel came on. turned car off found cracked hose by battery need diag

SOURCE: Mazda MPV Coolant Loss (but no overheat)

i had the same thing on my wifes 2000 mpv van...the ends of the radiator are made of some sort of composite type material....it had a slight crack in it....wasn't obvious until it got worse and started streaming water from it when warmed up....even after it cooled enough not to be spewing it was hard to actually see the crack though a few inches long....was hard to even see where the water and antifreeze mixture was coming from until i took out the radiator

SOURCE: 2001 porsche leaking radiator fluid.

check for imperfections in the welding on the radiator

SOURCE: mazda mpv 2002 coolant leaking somewhere. Filled

it also happen to me on a mazda mpv 2000 for years i was adding anitifreeze i found out that the water pump was leaking just do it yourself easy change just pay $60 dollars for it. underneath the car theres a plastic shield the antifreeze will drip and stay there thats why you didn't noticed the leak.

SOURCE: 2004 VW Bug leaking antifreeze. small puddles

the VW beetle has a plastic radiator, where the cap is if you look to the front of that it does a 90, it is cracked there. Here is the fun part, with a throx wrench ( I think it was a T-30) take apart the fenders and front bumper. At the auto parts store there is a plastic tank repair kit, the kit includes resign,fiber glass cloth, and a stick. You will need to rough up the crack as it is right where it angles and lay on the cloth and resign. Let it dry and it will not leak from there again. Good Luck Tim

Testimonial: "much more knowledge than the mechanic I took it to in the first place. Sounds like something my Dad and I can try to fix ourselves. quick response! "

Sean Piquet

• 1867 Answers
• Posted on Jan 19, 2011

SOURCE: my mazda mpv 2001 coolant leaking somewhere.

1. External Leaks
You need to get the vehicle to a mechanic to check all flexible coolant hoses, hose connections, around the exterior of the water pump and the entire radiator. To do properly the vehicle also needs to be on a hoist. If there is an external leak you should find coolant dripping from the front of the car while the engine is idling and the cooling system is fully pressurized. However it depends how bad the leak is and it's location.

2. Internal Leak

If coolant is leaking into the engine this is a serious problem and needs to be identified by a competent mechanic. For example, if you have a blown head gasket coolant will blow into the engine and contaminate the engine oil. If you check the oil in the engine's sump it should be completely free from coolant contamination.
You should also check the coolant in the radiator for any signs of oil contamination. If there is coolant in the oil then there will also likely be engine oil which has blown into the engines coolant passages and then mixed with the coolant.
IF you can find traces of coolant in your engine oil (or oil in the coolant) the likely problem will be a blown head gasket and the head on the engine will need to be removed and inspected .

Blown head gaskets are usually a result of an owner allowing the engine to overheat as a result of low coolant level, failed water pump or faulty thermostat. Overheating can also cause major damage to the head on the engine.