The Ford Barn - View Single Post - y-block blow by..

KULTULZ · 11-16-2019, 04:29 PM

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Simply put a VACUUM/FUEL PRESSURE gauge on the dipstick tube. That will tell you if there is a partial vacuum or a pressurized crankcase.

A PCV Valve is not a precise piece. The OEM was calibrated for a specific engine(s) and was calibrated to work with several. The fuel/IGN curves were modified to work with whatever valve. As the engine wore/lack of maintenance, the system failed. Modify manifold vacuum with a cam or never adjust the valves and it will throw off the OEM System. That and the early designs were not that concise.

There are also not as many valve applications as there once was. Many have been deleted and/or replaced (the one fits all and CHI-COM).

11-16-2019, 04:29 PM	#26
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,466	Re: y-block blow by.. Sponsored Links (Register now to hide all advertisements) Simply put a VACUUM/FUEL PRESSURE gauge on the dipstick tube. That will tell you if there is a partial vacuum or a pressurized crankcase. A PCV Valve is not a precise piece. The OEM was calibrated for a specific engine(s) and was calibrated to work with several. The fuel/IGN curves were modified to work with whatever valve. As the engine wore/lack of maintenance, the system failed. Modify manifold vacuum with a cam or never adjust the valves and it will throw off the OEM System. That and the early designs were not that concise. There are also not as many valve applications as there once was. Many have been deleted and/or replaced (the one fits all and CHI-COM). __________________ *** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)