Question about 2000 Oldsmobile Alero

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My radiator hose is very hard and hisses when i shut the car off. I just replaced the hose, put a new clamp on it, It was running hot so I replaced the thermostat. The temperature is fine now but the

The hose is extra hard and when i open the overflow radiator it goes down. I replaced the thermostat..can it be that the mechanic didnt do it right...he was very messy..It was burped but does it need to be burped again?

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  • Alicia Clayton Feb 16, 2012

    Thank you!!! I will try that!!!

  • 2strokeJim
    2strokeJim Feb 16, 2012

    make sure you use the correct coolant and is a 50/50 mix

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  • Master
  • 577 Answers

Yup , best thing to do is fill jug, run till warm, shut off and let cool and **** coolant from jug and start up and do again, overnight works best, just make sure jug has enough in it to draw back into system with out running out cause then you wil still have air in system

Posted on Feb 16, 2012

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Now my 2001 PT Cruiser is making a hissing sound. yesterday I replaced the air intake hose and the air filter. when facing the vehicle with the hood up it is coming from your left side. any ideas?


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How do replace radiator hose


As car repairs go, a radiator hose is one of the easier jobs.

Get a replacement hose.

Wait for the engine to be cold.

Loosen the hose clamps at each end of the hose.

Use a heavy screwdriver if needed to loosen the hose from the radiator and engine. Pull the hose off both ends.

Put new hose on, with the clamps. Tighten the clamps.

Fill the radiator with coolant as needed.

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Coolant system have bleed points. There is air in your system that needs to be purged out through the purge valves.. There maybe a few. You have to slightly open them when you first fill the system and let the coolant circulate till a little bit of coolant comes from bleed valves then you close them. Letting the system purge air by leaving the radiator cap open is not enough. Are you sure you put the correct temperature thermostat in , and facing the correct way?

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1 Answer

Car is running hot had a recent radiator change, the top and bottom hoses are very hard and hot ! could this be the thermostat stuck closed?


Check your coolant level. It may be low.
Did they put the proper mixture of anti-freeze back in? I would have the anti-freeze checked. Or you can buy a simple little tool for a few bucks and do it yourself.

A radiator hose is supposed to be "hard" to withstand the heat. If hoses become soft it is time to replace them.

I don't know enough about Mercedes to answer your question much further other than to suggest the thermostat. If they put in a new radiator, they should have suggested putting in a new thermostat also, but they don't always do that.

Check your anti-freeze mixture first.

Simple things first.

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RAdior is leaking badly what do I do? One of the hoses seems to be broken, and seems like a huge leak on the bottom??? Need help asap contact me at downloadkris4free@hotmail.com


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  • 2 Determine which radiator hose is leaking and exactly where the leak is coming from by looking for wetness.
  • 3 Purchase 1 gallon of antifreeze and the correct replacement radiator hose from your local auto-parts store or dealer. (Radiator hoses are not interchangeable. They come in specific sizes and shapes for your particular car model.)
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  • 10 Refill the radiator and the coolant reservoir with a 50-50 mixture of water and antifreeze.
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  • 13 Put the radiator cap back on.
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