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YOUR RESEARCHCoolant leak, then not... what the?
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Replace cap
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Leading evidence: 'Replace cap' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill markers' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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I had similar symptoms before I replaced my tank(with a slight crack).
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20 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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So I got home from the gym, found a drip drip leak of coolant on the left hand side near the rear tyre, quite a puddle.
I open the coolant res cap, hear a whoosh, coolant level is ok. I start the car up again, and there is no leak?
I drive to work, and there is no leak?
Im assuming the cap is buggered? I have a 2001 model.
Replace with the newest cap. If that doesn't work, I'd suggest you have a cracked coolant tank. I had similar symptoms before I replaced my tank(with a slight crack).
If the cap has an earlier part # (-00 or -01) replace the cap with a newer one with a part # of -02 or -04 IIRC.
My WAG is the coolant tank has a crack.
Do a pressure test. A hot one.
Drive the car around town to get the engine up to temp. Leave the A/C off. But you want to drive the car enough the radiator fans come on.
Back at your driveway with the car positioned for easy access by a flat bed tow truck operator raise engine rpms to say 1500 and hold
until the radiator fans come on.
Then shut off the engine.
Get out of the car and wait.
When the hot coolant comes gushing out of the bottom of the coolant tank call the tow truck company and have the car taken to a shop for a new coolant tank. Be sure the new cap is moved from the old tank to the new one.
hard to call that just the surface, rubber hoses are a consumable item... the reason? Rubber continually cures, based on temperature or pressure, so it just harder and less flexible.
The pressure test would have revealed any lose clamps I would think... its a real mystery! No issues with the water pump, its leaking around the coolant tank...
It's not uncommon to have the tank with cracks that leak only when hot. Oh, if the leak is slow, the coolant may drip onto the hot exhaust and get evaporated without a trace too.
Yes which would be because of the expansion with heat, which is replicated with pressure... they tested it for ages at the garage, I dont have a compressor at home, bugger it.
My coolant tank cracked high up where you couldn't see it until the tank was removed......and it only leaked when the engine / coolant was hot.
Once the tank was out of the car, the coolant resedue was clear to see, but the crack wasn't.
