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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

valve's? gears?

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Old Jul 16, 2006 | 12:30 AM
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Smile valve's? gears?

ok, first,do u need a PCV valve?
then wherre is the brake proportioning valve?
i have a 84 150 4x4 300I6 3.55 gears front and rear limited slips
are the 3.55's good gears for my truck? thx yall
 
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Old Jul 16, 2006 | 03:41 AM
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You don't need a PCV valve, but you might need it for a smog inspection. I am not entirely sure what it is for, but I am pretty sure you will need some kind of breather to replace it. You can't just cap off the hole. I think the crankcase pressure can blow out gaskets, which is what I believe happened on my capri. I capped of the valve cover holes, and my pan gasket gave way shortly after.

The proportioning valve should be located under or near your master cylinder. Just follow the lines from your MC and they will go to a little metal block that then splits the lines several ways.

If you are running stock or up to 31" tires, 3:55 gears should be fine.
 
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Old Jul 16, 2006 | 01:12 PM
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It's a good idea to run with a PCV system as it takes all the oil soaked fumes out of the engine and helps it run better and more efficiently. It also keeps the engine really clean and prevents sludge and poo building up in the engine. PCV stands for Positive Crankcase Ventilation, and it works.

For example, I have an F-250 with an operating PCV system on my 460 and I get 9-9.5 MPG's. I also have a 72 Pontiac Ventura without a PCV system on a 350 and it gets 7 MPG's.
 
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Old Jul 16, 2006 | 02:19 PM
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so wut if im running an after market air cleaner where do the hoses go? and also the last time i had it hook up it was pushing oil through it into the air cleaner. wuts with this
 
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Old Jul 16, 2006 | 06:09 PM
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I have an Edelbrock air cleaner on Hoss too. It came with an elbow that you can bolt on to the base of the unit, it just needs to be punched out so you can attach it.

The little hose that fits onto the end of the PCV valve goes to the base of either the carb if you have a fitting there or the front of the EGR plate. The hose that sits on the top of the oil cap, (if you have the factory one), goes to the air cleaner. That one does pull oil and crap into the air cleaner, but it cycles the fumes from the oil back into the carb to be burned again.
 
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Old Jul 16, 2006 | 09:05 PM
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wut happen to the oil that goes into the air cleaner? thx ya'll are great!
 
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Old Jul 16, 2006 | 11:38 PM
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On a stock air cleaner, there's a little breather filter inside attached to the housing that soaks up all the oil. On an aftermarket air cleaner, the oil just soaks the air filter itself. It's a pain in the rear, but it's a good idea to change the air filter more often to keep the truck running good. If the filter becomes oil soaked in just a couple hundred miles, you might have a problem, but it can last at least a couple thousand miles.
 
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Old Jul 17, 2006 | 02:13 AM
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wut would be the problem if that happend,tomuch blowby?
 
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Old Jul 17, 2006 | 02:15 AM
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thats a good question
 
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Old Jul 17, 2006 | 12:54 PM
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I dion;r know of this was explained or not but, If the PCV valve was removed where would all the pressure (developed by the pistons goes up and down and the crankshaft turning) from the crankcase ventilate to.?

Out the dip stick hole , that's where ..then look at the mess one would have.

My suggestion, Keep all the engine systems in top notch condition.

Do you have a vented oil cap on that engine ?

I forget if those came with them.
 
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Old Jul 17, 2006 | 02:19 PM
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Originally Posted by big hoss 29
On a stock air cleaner, there's a little breather filter inside attached to the housing that soaks up all the oil. On an aftermarket air cleaner, the oil just soaks the air filter itself.

Um, on a properly working Engine, and PCV system, that shouldn't happen.

Clean air is sucked through the Breather filter goes through the engine (Usually through the oil filler cap), picks up all the bad acidy (engine wearing) vapors and goes out the PCV valve to be burned.

If your air filter or crankase breather filter is being soaked with oil, you have a problem with your PCV valve or you have too much blowby gases in your engine, usually due to worn piston rings.
 
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Old Jul 17, 2006 | 08:35 PM
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Originally Posted by 81-F-150-Explorer
Um, on a properly working Engine, and PCV system, that shouldn't happen.

Clean air is sucked through the Breather filter goes through the engine (Usually through the oil filler cap), picks up all the bad acidy (engine wearing) vapors and goes out the PCV valve to be burned.

If your air filter or crankase breather filter is being soaked with oil, you have a problem with your PCV valve or you have too much blowby gases in your engine, usually due to worn piston rings.
You are correct. I got it completely bass ackwards. I have had a truck soak the filter with oil but it had major problems. I apologize for the mis-info.
 
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