Question about Honda VF500 VF700 VF750 Magna Sabre 30mm Vacuum Carburetor Diaphram Diaphragm Slide
I just purchased a Honda motorcycle VF700 with no vacuum on the left bank (upper and lower). does the vacuum come from the cylinder or crankcase?
SOURCE: 2000 mustang 3.8 has p0174
Hey, that's pretty good logic. Why you asking us? Just the same, I would verify the gasket leak by spraying carb cleaner on the gaskets while the engine is running. If the speed changes, there is your leak. You will have to remove the upper manifold first anyway. Be careful not to tear up the gaskets when you pull the manifold off, so you can inspect to see where the leak was--validate the issue, you know. OK?
Posted on Jan 23, 2011
Normal function of the cooling system is when it heats the coolant expands and is allowed to leak into the expansion bottle when the cooling system pressure exceeds the pressure cap rating. When the system cools the shrinking coolant should suck coolant from the bottle and therefore maintain the level.
There are two things that usually go wrong - either the head gasket is failing and allowing combustion gas to leak into the cooling system and displace more coolant than is normal due to temperature rise or the pressure cap doesn't have a perfect air-tight seal under the rim so the shrinking coolant can't suck the expelled coolant back from the bottle but draws in air instead.
Posted on Sep 05, 2018
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