hey guys, a year ago i just bought a 1995 f-150 lightning. it has a 351w5.8L supercharged engine with a msd ignition. i luv the power my truck puts out, and its my overall baby. i basically wipe it down with baby dipers. but just recently i drove my truck down the street and asumed i blew a headgasket bc of extreme amounts of white smoke. soo i took out each spark plug and tested for water in the cylinder. and found to come there was in the 6th. so i went about fixing the prob. myself bc i didnt have the money to fix it..... "5 days later" with a few mess ups of timing and the valve cover gasket and oil leakage (bc cork gaskets suck!!!) i resolved my prob with pro-fel and my timing is perfect, now my truck is all together but when i drove i again just down the street to test my work, it still smoke lightly, is leaking oil from the" i guess u would call it" the valve cover filter or caps, and i keeps breaking the super charger belt. i expected it to smoke a little bc its supose to clean out all the **** that was in the motor. but the main question is could it be the RINGs... maybe oil mixing with gas bc its a light white/blueish color of smoke. or maybe theirs water in the oil and is going past the rings bc its to thin i dont know. i already changed the oil already twice to get a build up residue of like a mustard looking gunk from when i blew the headgasket,,.......seeking professional help or any kind of knowledge ANY REPLYS WOULD BE GREATLY APPRECIATED THANKYOUkeep striving lightning owners

 

Sounds like you have something attached in the wrong place, a vacuum line misrouted, or your original problem is worse than you thought. You should try getting the motor running correctly without the supercharger first, and post up some pics and detailed specs of what you got. .

 

everytime i have blown a head gasket (from nitrous not superchargers never messed with them) and gotten water in my oil it has always looked like a milkshake, not mustard colored stuff i have no idea what that would be. you said "and found to come there was in the 6th. so i went about fixing the prob. myself bc i didnt have the money to fix it..... "5 days later" " ---does this mean that you let it sit with water in that cylinder for 5 days?! that mustard colored stuff could be rust and you may be in need of a new shortblock or at least a hone and new rings.\

are you sure you have the head gasket on the right way? and did you torque it in steps of about 5-10ft-lbs in a cross pattern? if you did not you could have cracked your head or made the gasket not seat properly.

 

to take apart and replace the headgasket , then put the whole engine back together took me 5 days but i made sure that the engine was properly oil before letting sit to open air. i started working on it the day after the gasket blew. and like you said i did tighten down all the bolts right in two steps (used my haynes repair book to find proper torques) I even put a pressure tester on it to make sure that the headgasket wasnt leaking again. Now im trying to get, i think so called compression tester from a friend to test the rings. or compression of pistons. dont want to jump the gun and replace the rings right away.

and yeah i heard it was suppose to be a milkshake color too, thats kind of wierd THANKS FOR YOUR HELP

 

i had the supercharger of while timing the engine and was running fine, i even used a timing light. then i put the superchager back on and repeted the previous. dont understand what the vacum hoses are for, even though i know what they look like. what exactly do they do for the engine??? THANKYOU

 

just curious, did you see where the head gasket blew? and i don't know about all of the vucuum hoses you'll have to trace them, some of them go for emissions crap and stuff like that, i ripped the computer out of my truck and threw on a carb and have no emissions crap on it either so i couldn't even go out and look to help you, plus i have a naturally aspirated 5.0 not a blown 351 so i don't even know if they would be the same

 

i drove the truck down the street today and broke the supercharger belt once again, would only smoke when applying large amounts of gas, doesn't smoke in idle. i dont get the problem.

 

the headgasket was blow on the top of the piston, where the metal ring in the gasket goes around the piston. seemed to be pressed up from water being in the cylinder and having no wheres to go,..... trying to post pic's

 

how did water get into the cylinder? you pulled the intake and put new gaskets on it when you pulled the head right? and the blower belt breaking is it because it is slipping? is it possible you have water in your supercharger that does not want to compress and causes the pully to have more turning resistance than the belt has frictin so it slips till it breaks? or is it just throwing the belt off? are you sure you have the belt and tensioner on right? is the belt "cogged" meaning has little teeth to bite the crank and blower pulley. could your valve seals be leaking causing oil to get into the cylinder and burn causing smoke or is it water type smoke?

sorry for a lot of questions haha but i am really curious about your problems

 

what would cause your valve seals to leak bc they may be leaking, good point.
the guy that own the truck before me raced it, maybe beat the **** out of it

 

well on a blown motor (note i have never built a blown motor, this is just my theory but i do know a little about engines) if you blow an intake gasket the blower pressurizes your crankcase (the part in the motor that oil is in) because the pressure from the intake is leaking into the crankcase by the lifter valley. if your valve seals were weak this could have caused them to leak. i'm not sure how the crankcase evac system is set up on a blown motor weither it is with a pcv valve or if it is done through a vacuum pump or what since you have pressure instead of vacuum.

but then the other side of that theory is if you did have a blown intake gasket that caused your valve seals to leak oil into the cylinder when you fixed it since it is a blown motor you should have positive pressure in the cylinder and when either valve opens if you have weak valve seals the compressed (from the blower) and atomized mixture (fancy way of saying air/fuel mix) would want to travel up the valve past the bad seal into the crankcase instead of it sucking oil down from the crankcase.

so after thinking about it i don't think it would be your valve seals...


you said that when you first pulled it apart it looked like there was water in the cylinder that caused the head gasket to blow, where did that water come from? is it possible you have a cracked head? but then thinking about that wouldn't it pressurize the cooling system if you did have a cracked head since you have a blower, and it would not suck any water into the cylinder?

maybe someone who has a blower or experiance with them can chime in.....


what did you set your timing at? is the motor pinging?

 

maybe try posting this in the smallblock ford part of the forum
https://www.ford-trucks.com/forums/forum55/

 

I don't know what's going on with your belt, check alignment and is it using the acsesory belt or a idependant belt and is it cogged or ribbed?

As to burning oil I got an idea you need to check out. Stock the crankcase is connected to the intake vacuum via the PCV and breather to pull gasses out of the cranckcase. With it being supercharged when your in it the manifold is pressurized which if the stock PCVbreather is still in place it could pressurize the crankcase and could case both oil burning cause it's pushed through the valve seals and leaking, pushing out the breather/filler cap.

The easiest solution is to remove the PCV and any crank breathers from the intake manifold or any piping after the blower to before the blower or to independant breathers.

The best solution is an exhaust evac system like the systems offerd by MrGasket and Moroso. These sysytems use a special insert in the exaust to use the flow of the exaust to create a vacuum and pull the gasses out of your crankcase. This creates a vacuum in the crankcase which will prevent oil leaks/burning and help seal the rings.

There are lots of ways oil can get into the cylinder but if it's only under boost chances are it's caused by the boost.

 

isn't the pcv valve a one way valve? i don't know for sure but i always thought it was a one way check valve

maybe that is the problem the check valve is broken and letting the pressure get into the crank case.....

 

Yes the PCV has a one way valve but there not very good, and stock i beleive there is also a breather hose that is unrestricted off the intake tube.

Just something to check out and many people skip.

As to the belt, after checking alignment check to make sure the blower turns freely. You may want to try running with the belt turning the blower but with the blower not feeding into the motor so it doesn't build pressure and see if the belt servives.

Another thought what kind of blower some of them use oil pressure or have oil in them to lube gears. The seals could have gone in the blower leaking out the oil into the motor and possably damaging the bearings in the blower.