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I rented the coolant system pressure tester from the auto parts store:
1. Hooked up the radiator cap: It’s my understanding, the cap should “open” at 16-19 psi. I got it to 25-30 and it never opened. I’m thinking I at least need a radiator cap – yes?
2. Hooked up the pressure tester to the radiator: Started pumping it up, and couldn’t even get it to 10-12 psi. I could hear bubbling and the pressure quickly dropped. Then I noticed coolant on the floor of the garage – a nice trickle coming from the back of the engine.
I pumped it up again, could hear the bubbling/hissing back near the #6 cylinder (closest to the brake booster.)
I decided to take off the upper intake plenum to see if anything underneath was leaking and noticed a small puddle in the #6 area of the ending. After putting the system under pressure again, coolant starting bubbling out of the #6 fuel injector.
I also took out the #6 spark plug and stuck a q-tip in there – the q-tip was dry and the spark plug was dry, too.
Does the fuel injector seal off a coolant channel? Or am I looking at a deeper gasket?
Thanks
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Cleaned out around the injector, started to pressurize the system again…it’s the intake gasket not the injector.
I knew the injector didn’t sound right.
[quote=”nplsdvr” post=95625]Cleaned out around the injector, started to pressurize the system again…it’s the intake gasket not the injector.
I knew the injector didn’t sound right.[/quote]
sounds like you answered your own question. 🙂
Gettin’ there.
Got the lower intake off. Tons of sludge in the valley and under the intake. It was disgusting. You know the stuff you find when changing a diaper? Same thing only without the smell. And the good news: no coolant in the oil/sludge!
Cleaned all the gasket surfaces, cleaned out a bunch of sludge that I could get by hand, put a new thermostat w/gasket and intake gaskets in place and buttoned up the coolant system.
I did NOT top off the coolant yet, but I did do a pressure test while I still have the tool. Before, I couldn’t even get it to hold 10 psi it was leaking so badly, now I got it up to 15 psi and it held.
I didn’t button it up completely because the #1 fuel injector didn’t look too healthy; I think there’s a crack in the side of it. There isn’t a misfire code, but I figured it would only be a matter of time, so I ordered the new injector, it should be here tomorrow.
Monday: Put in the injector, secure the ERG and reconnect the vacuum hoses and upper intake, top off the coolant – give it another pressure test and fire it up!
So far, so good. {fingers crossed}
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