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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Re: My radiator hose is very hard and hisses when i shut...
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
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Drain the coolant and dispose of properly,
Remove the clamp on the upper radiator hose where it connects to the elbow on the engine block.
Remove the hose from this connection
Remove the 3 bolts on the elbow that the hose was on, where they connect to the engine block.
Remove the elbow, this is the housing.
Clean the surfaces that the housing covered using a razor blade.
Replace the thermostat with a new one.
Replace the gasket
Torque the bolts for the housing to the right torque.
Replace the hose and clamp.
Fill the Radiator with NEW coolant. Leave cap off
Start the engine and squeeze the upper radiator hose several times to remove air.
Watch for the level in the radiator to drop
Add coolant as needed, till the level is even with the inside lip on the radiator neck WHEN THE ENGINE IS HOT.
Put new radiator cap on.
Stop engine and drain the reservoir tank for old coolant.
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?
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.
Turn off the engine as soon as you suspect a leak, to prevent the engine from overheating.
Determine which radiator hose is leaking and exactly where the leak is coming from by looking for wetness.
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.)
Wait for the engine to cool down for at least 20 minutes, before beginning any work on the cooling system.
Place a large pan or wide bucket on the ground under the hose to catch the coolant.
Use a screwdriver to loosen the hose clamps at both ends of the hose you are replacing.
Remove the radiator hose by twisting and pulling where it
connects to the radiator and engine. If the hose won't budge, use a
utility knife to cut it off the fittings.
Remove the hose clamps from the old radiator hose and slide them onto the new hose.
Put the new radiator hose on. Spray the inside of the hose
ends with WD-40 if the hose is hard to get on. Tighten the hose clamps.
Refill the radiator and the coolant reservoir with a 50-50 mixture of water and antifreeze.
"Burp the cooling system" by running the engine with the
radiator cap off until the engine warms up. Keep the engine running
until both the upper and lower radiator hoses feel warm (this indicates
that the thermostat is open and the coolant is flowing through the
entire system). Burping the cooling system allows any air bubbles to
escape. Add coolant to the radiator as needed.
Look for leaks. Inspect around the hose clamps for dampness. Tighten the hose clamps if there is any wetness.
Put the radiator cap back on.
Check the coolant level after driving, to ensure there are no leaks
BUY YOUR RADIATOR HOSES FIRST MAKE SURE NEW HOSES MATCH THE OLD HOSES. BUY NEW RADIATOR CLAMPS AND HAVE EXTRA GALLON OF ANTIFREEZE. MAKE SURE ENGINE IS COOL IF YOU GOING TO CHANGE TOP RADIATOR HOSE REMOVE RADIATOR CAP OR OVER FLOW JUG CAP IF YOUR RADIATOR DONT HAVE RADIATOR CAP FIND RADIATOR DRAIN PLUG.PLACE A CATCH PAN.OPEN RADIATOR DRAIN PLUG CATCH ANTIFREEZE. DRAIN HALF ANTIFEEZE IF YOU GOING TO REPLACE TOP HOSE AND DRAIN OUT ALL ANTIFREEZE IF YOU GOING TO CHANGE LOWER COOLANT HOSE TO WATER PUMP.WHEN DONE CLOSE DRAIN PLUG.PUT ANTIFREEZE IN A SAFE PLACE FROM PETS AND KIDS UNTIL JOB DONE. WHEN YOU REMOVE COOLANT REMOVE WATER HOSE CLAMPS THEN REMOVE RADIATOR HOSES PUT NEW RADIATOR HOSES AND CLAMPS ON HOSES TIGHTEN HOSE CLAMPS DONT OVER TIGHTEN. POUR ANTIFREEZE IN RADIATOR.CRANK ENGINE UP CHECK FOR LEAKS.CHECK COOLANT LEVEL WHEN THERMOSTAT OPENS ADD MORE COOLANT AS NEEDED.
First make sure engine is cool.
-Put drain pan under car, coolant will run out.
-Remove the TOP radiator hose that runs to the metal thermastat housing. Coolant will now be running out, try and direct it to the drain pan below.
-Remove the thermastat housing, BEFORE removing the thermastat make sure you TAKE NOTE at how it is situated in the casting.
- Take the thermastat housing and run a wire brush on the flat spot were the old gasket material is.
-Both mating sides of the thermastat housing MUST BE PERFECTLY CLEAN. There can not be any old gasket material left.
-Insatll new thermastat.
-Put a very light amount of PERMATEX orange high temp. silicone on BOTH sides of the new gasket.
-Put a small amount on bolt threads also.
-Now install thermastat housing, and bolts.
-Tighten bolts down a little at a time, alternating between the two, unitl till they are tight.
-Install the radiator hose, and tighten hose clamp.
-Remove radiator cap, pour in coolant, until it sits just below the radiator cap neck. This may take a little time as the system has some air in it.
-Install the radiator cap. Make sure you radiator overflow tank is filled properly.
-Remove the drain pan, make SURE ALL the tools use used are secure, and out of the engine bay.
-Start engine, and place your heater control to 'HEAT"
-Let engine run until the top radiator hose is hot, which means you thermastat has opened.
-Keep watching the engine temp AT ALL TIMES, we wnat to make sure there is no air in the system.
-Inspect for any leaks. Now when the top radiator hose is hot make sure the hose clamp is tight.
Please let me know how it goes.
First thing I would do is get your supplies. Antifreeze, lower radiator hose, 2 new hose clamps, serpintine belt, and I would purchase a Chiltons repair manual for your car. It is abour $15 for the manual but it will cover about very repair you will need to make as time goes on.
On newer cars you have to hold the automatic tensioner back with a wrench as you uninstall or reinstall the belt. Make sure you know or remember how the belt runs. You can put the belt most of the way on, then hold back the tensioner for the last step.
For the lower radiator hose, you need to drain the antifreeze from the radiator. The drain plug is usually on the bottom or the on the bottom engine side of the radiator. Make sure you drain it in a pan/ bucket/ pail as I believe it is against the law to drain it out on the ground and watch that pets/humans don't drink it because they will die. After draining it unsrew the clamps holding the hose on and remove the hose. Sometimes the hose will be stuck and twisting it or running a screw driver between the hose and the fitting will loosen the hose. Put the new hose on with the new clamps. I always use new clamp so you don't have to trust the old beat up/ stretched clamps. But don't throw out the old ones, as you may need them for an emergency repair sometime. Either put the old fluid back in(if it is still good) or put in the new stuff. Make sure you get the right mixture. You will need to run it a while and have the mixture checked.
Like I said about the book----it should cover both of these repairs, and tell you when to do routine maintence, the capacities of your fuel tank, radiator, oil, transmission, etc.
Did you check the thermostat? brand new thermostat sometimes went bad too; happen too me once on my 1989 toyota supra....; Check the water pump and hoses. Flush the radiator really good then get 50/50 mix water & coolant;