Boeing 717

The valve housing had a crack.
Is the procedure to bleed the coolant system in the workshop manual?

mj951

If not in the manual you'll find it here: http://www.clarks-garage.com/

thomasmryan

3-16 but it's the standard warm it up and crack the valve until you get a solid stream.

Jürgen sqeezes the lower hose and bleeds it like a brake system in one of his videos but a pressure tester also works well. This assumes the air bubbles have worked their way to the high point though. it's best to repeat the process over a number of drives.

Let it sit a few days and see if it releases a vacuum when you pop the cap. If not, patiently wait for the next smallest leak to reveal itself.

The quick and dirty method is to pump the system with just air and squirt soapy water on every joint. Putting a million pounds of torque on a worm clamp exasperates the problem as it over compresses the hose during heat cycles. Just a thin smear of hylomar works amazing well.

Boeing 717

Thanks guys.

odurandina

1. you have an infinitesimally small headgasket leak.

or

2. your H20 pump has begun to fail,

or

3. your little itty-bitty heater hose needs replacing (prolly time to replace it regardless)

or

4. hose connection

or

5. your pressure relief valve is open a crack.

or

6. your radiator going bad.

i have a nice spare radiator in storage, that i forgot about.


oh you solved it?

Boeing 717

Yup, cleaned engine bay of all residual coolant. And just test drove it again. Problem solved!! No more coolant leakage. Glad it wasn't the oil filter housing.

Just bought 4 new firestone Indy 500 tires and putting cup 1's on in the next few days. Car is coming along.