Cheezit's pressure video
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Cheezit's pressure video
Just came across that while watching some of the powerstrokehelp videos. Daughter's truck is losing coolant and I've been through Bismic's procedures up to the vacuum test. Problem is, I could have a hose leak, but I'm not seeing it and normally I'd do a pressure test to find it. Don't want to push coolant into cylinders though.
I'm having difficulty find a way to create vacuum. I have an old vacuum gauge that I can tee in but have no idea how to create the vacuum. The kits in Bismic's faq don't seem to be available in my area. So in lieu of the vacuum test, my thoughts were to first get the NAPA leak detector kit and check for compression gasses in the cooling system. If it turns color, stop there. If not, perform a pressure test or is that still too risky?
I'm having difficulty find a way to create vacuum. I have an old vacuum gauge that I can tee in but have no idea how to create the vacuum. The kits in Bismic's faq don't seem to be available in my area. So in lieu of the vacuum test, my thoughts were to first get the NAPA leak detector kit and check for compression gasses in the cooling system. If it turns color, stop there. If not, perform a pressure test or is that still too risky?
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Joined: Feb 2011
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From: L.A. (Lower Alabama)
My local parts store sells the plastic Mite-Vac set up for something like $40. Note: if you use it on brakes later, be sure to keep the fluid out of the pump part.
I never really thought about it before but there is a vacume pump under the hood of the truck...Maybe plumb in a jar or something so it doesn't pull coolant into the pump.
If you didn't want to risk it, you could maybe snag one from a wrecking yard and rig it up.
You can get a positive result for combustion gasses in the coolant with bad head gaskets or leaking EGR cooler, but a negative result would be a good thing.
I never really thought about it before but there is a vacume pump under the hood of the truck...Maybe plumb in a jar or something so it doesn't pull coolant into the pump.
If you didn't want to risk it, you could maybe snag one from a wrecking yard and rig it up.
You can get a positive result for combustion gasses in the coolant with bad head gaskets or leaking EGR cooler, but a negative result would be a good thing.
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My local parts store sells the plastic Mite-Vac set up for something like $40. Note: if you use it on brakes later, be sure to keep the fluid out of the pump part.
I never really thought about it before but there is a vacume pump under the hood of the truck...Maybe plumb in a jar or something so it doesn't pull coolant into the pump.
If you didn't want to risk it, you could maybe snag one from a wrecking yard and rig it up.
You can get a positive result for combustion gasses in the coolant with bad head gaskets or leaking EGR cooler, but a negative result would be a good thing.
I never really thought about it before but there is a vacume pump under the hood of the truck...Maybe plumb in a jar or something so it doesn't pull coolant into the pump.
If you didn't want to risk it, you could maybe snag one from a wrecking yard and rig it up.
You can get a positive result for combustion gasses in the coolant with bad head gaskets or leaking EGR cooler, but a negative result would be a good thing.
Last edited by ajg617; Oct 12, 2014 at 03:57 PM. Reason: more info
Lead Driver
Joined: Feb 2011
Posts: 8,241
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From: L.A. (Lower Alabama)
For some stoopid reason (probably cost) they use o-rings that swell and deteriorate when exposed to brake fluid. I let the catch cup overfill and sucked some brake fluid into mine and it quit working. Luckily, I have and assortment "kit" of o-rings and it's a quick job to change them out. I'm much more careful now. They do (or used to) sell a set made of metal, it likely has better seals in it.
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Went with trying to put a tee in the return hose with the plan on connecting my analog tire pressure gauge. Got a schrader valve at the local hardware store to screw into the gauge and connected it to a brass vacuum fitting. Not sure what that schrader valve fits, but it isn't a car size.
Going to get another cap and a real pressure gauge.
Going to get another cap and a real pressure gauge.
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