Is this hose supposed to be “flat”?
09-23-2018, 02:35 PM
#3
Burning Brakes
I can't tell from your picture but it is the upper radiator hose and if the side of the hose are sucked in together then you have a failed pressure cap on the surge tank. Get a replacement, top off the coolant and then bleed the air that will be trapped in the cooling system as a result of the failure.
The pressure cap on the surge tank acts like a two way valve. When the coolant is rising in temp above 212* it closes off to allow pressure to build on the cooling system and as the coolant drops down under 212* it opens up to allow atmospheric pressure back in on top of the coolant. If the cap fails to let air back in then a vacuum is formed inside the cooling system resulting in the hose sides being sucked together and the air that should remain on top of the coolant to be sucked into the engine. Hence the need to bleed the system if this failure has occurred.
The pressure cap on the surge tank acts like a two way valve. When the coolant is rising in temp above 212* it closes off to allow pressure to build on the cooling system and as the coolant drops down under 212* it opens up to allow atmospheric pressure back in on top of the coolant. If the cap fails to let air back in then a vacuum is formed inside the cooling system resulting in the hose sides being sucked together and the air that should remain on top of the coolant to be sucked into the engine. Hence the need to bleed the system if this failure has occurred.
09-23-2018, 02:50 PM
#4
Melting Slicks
Thread Starter
Thanks. I just picked the car up from the dealer after having the water pump replaced. They had to drain the coolant and replace as part of the repair. Looks like something went wrong. It’s impossible to find a good repair shop these days.
Last edited by STRMLNE; 09-23-2018 at 02:52 PM.
09-23-2018, 03:15 PM
#5
Melting Slicks
Thread Starter
Had a very loud squealing noise when car was cold. Dealer told me water pump was leaking onto the belts causing noise. Water pump was replaced. And yet I still have the noise albeit it’s slightly quieter. Car going back tomorrow.
09-23-2018, 04:11 PM
#6
Team Owner
Member Since: Oct 2004
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St. Jude Donor '05
Whatever happend to a real mechanic that can diagnose? Todays version is some "me too" parts changers that guess and learn at your expense.
Spent years and over 3k chasing a code turned out to be a fuse from jump starting someone the whole time. Pizzed.
Spent years and over 3k chasing a code turned out to be a fuse from jump starting someone the whole time. Pizzed.
09-23-2018, 06:53 PM
#7
Team Owner
FWIW, if you are going to replace the pressure cap, there is an upgraded version that's rated at 18 psi. The AC Delco part number is RC87 and the GM part # is 25713160. I picked one up for my '02 from
for under 10 bucks.
