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Old 11-28-2017, 10:50 AM   #21
dsraven
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Join Date: Nov 2010
Location: calgary alberta
Posts: 7,774
Re: Who wants to play; Find the problem?

before you start the engine again, pull the dipstick and check the oil. if it has ANY chocolate milk look to it then you need to pressure test the coolant system. also remove the oil filler cap, flip it upside down and look for a milky residue or a lot of condensation on the under side. this indicates a coolant leak into the engine oil. if this is the case it is not going to be long until your engine bearings go south. if your intake gaskets were leaking to the exterior then they were also probably leaking to the inside of the engine. you could also try cracking the oil drain plug-on a cold engine that has sat over night-to see if there is any water that leaks out before the oil starts to come. that is a tell tale of a coolant leak for sure. a small coolant leak will possibly not show up as cloudy oil on the dipstick. an oil change into a clean container would show it better. like said, if the intake bolts were loose then the gaskets are likely soft and possibly leaking or torn from the intake shifting slightly as the engine runs and things move from vibration and expansion/contraction and the pull on the throttle cable etc. the intake ports can pick up oil sprayed under it in the lifter valley if the gasket is bad, possibly causing the oil burning and poor running-inability to get a constant tune.
because you intake bolts were not tight I would say, for the money and time invested, just replace the intake gasket set to be sure your gaskets aren't torn or soft/leaking. (felpro gaskets and a good sized bead of "the right stuff" silicone for the valley ends-not the formed or cork gasket there) while you are in there you can check the block in the valley area to ensure it isn't cracked or anything (look in the area above the lifters for a spot that just won't dry up like the rest of the area while cleaning. you may need some varsol or brake clean to get the area to dry, but remember they are flammable so do this with the oil pan plug removed and allow to dry thoroughly). you can also replace the distributor base gasket while it is out and check the bushings and centrifugal weights and springs etc-maybe even a recurve to set the base and max advance while you're there. check the oil pressure sender and fitting, if equipped, for leaks and/or cracked fitting. you will end up with the piece of mind that it is right plus probably solve your vacuum leaks and possibly your oil leaks. the engine may then be tune-able. remember when you remove the intake/carb that the carb needs to stay right side up so any nasty stuff in the bottom doesn't get into a spot where it will cause issues later
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