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PUT IT IN THE SHOP ,3 TIMES CHANGE GASKETS AND FOUND BLOCKED PVC SYSTEM STILL LECKS OIL BLOWING GASKETS

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Usually when the engine is blowing gaskets and leaking alot of oil the rings on the opistons are shot, this pushes the compression into the crank case, and all that pressure has to go some where. Do a compression check on the cylinders . If you find real low (less than 70lbs) This is most likely the cause. Also bad rings will make the car have no power.

Posted on May 22, 2011

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Posted on Jan 02, 2017

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What causes excessive crankcase vaccum, besides pcv. Pcv confirmed OK and functioning, all vacuum lines routed correctly 07 f150 5.4 3 valve


I can only think there is a fault somewhere in the pcv system that has somehow been overlooked.

The vacuum part of the pvc system provides the motive power for the flow of clean fresh air through the crankcase and into the inlet manifold via two routes, taking with it the various crankcase emissions to be burned up during the combustion process.

At idle and low revs and other times when manifold depression is high, such as during overrun, crankcase emissions tend to be drawn through the pcv valve directly into the manifold and at other times, when engine speed and load increases the venting increasingly takes place through a second vent into the air cleaner or intake. At low speed, etc. the second vent becomes the supply of clean fresh air for the crankcase.

In the early days of the pcv system some engines had fresh air supplied via a filter fitted to the crankcase and others used a vented oil filler cap. A few engines had no air inlet at all and the manifold was simply connected directly through a length of half-inch hose to the valve cover. Those engines almost never leaked oil...
For a few years BMC used a complicated vacuum regulator valve mounted on the crankcase and again a large bore hose to the manifold.

Since those days most manufacturers have settled on one of two systems using either a pcv valve or a small air bleed into the manifold to provide the motive power for the ventilation of the crankcase. Mostly there is a flame or spark arrestor/oil mist trap in the breather that sometimes becomes blocked and causes trouble, though the trouble is usually the opposite of too much vacuum.

I suggest you go back to the drawing board and recheck everything. During a service I usually test the breather by putting the compressed air blow-gun down the dipstick tube and sealing it with a cloth. If the crankcase breather is clear and working properly no pressure will build up inside the engine.
Obviously some caution is needed to avoid blowing out seals and gaskets if the breather is found to be inadequate.

Aug 08, 2015 | Cars & Trucks

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All Ford 5.0l engines


A lot of people don't know this. On some Ford 5.0l engine there is a little filter below the positive ventilation crankcase (PVC) valve. Too many people have replaced only the PVC valve thinking the reason for oil blowing out of the valve covers, and any other gaskets or seals, will correct the problem. In reason, the PVC is one of the main areas to check and is the easiest and cheapest way to go. In all, the PVC filter is to blame. Remember preventive maintenance goes a long way have your oil changed regularly.Lee Davidian

on Jan 09, 2010 | Ford Crown Victoria Cars & Trucks

1 Answer

Why does my 2004 Lincoln ls v6 sputter at 50 to 60 mph


Hi,I have a 2004 as we'll,bought it used about 6 months ago,he said he had new valve cover gaskets replaced,our vehicles are know to have leaky gaskets,the mechanic that did the job,didn't put one of the hoses back on right,it put in it in a bind,and cause it to crack and leak,I found one on ebay for about 50 bucks,if you open your hood,to the left are 2 hoses,right at the end is where it cracked and started sucking air,the other end goes around the engine and connects to the pvc valve on the back side,I also replaced the pvc,but the old one was still good,with the leak,it cause the engine to not have any power,also if you look on both sides down on engine,is it leaking oil,if so then the valve cover gaskets are leaking,their's a good you tube video showing you how to do it,plus changing the plugs you have to remove the intake to get to them,whoever came up with this design needs a spanking,lol,let me know if your hose is bad,I will show you where to get a new one,your check engine light may come on,mine did.

Aug 01, 2015 | Lincoln Cars & Trucks

3 Answers

I have engine oil under the ignition packs.


IF YOU GETTING OIL AROUND COIL PACK.MORE LIKELY YOUR PVC VALVE CLOGGED. ITS ALLOWING CRANKCASES PRESSURE BUILD UP CAUSING OIL TO BE PUSHED BACK UP IN THE PVC.OR COMPRESSION RINGS WORN TO A EXTENT THAT THE CRANKCASE IS OVER PRESSURIZED. FORCING OIL THROUGH THE PVC VALVE.YOU HAVE A PVC VALVE NEAR THE COIL AREA.THAT COULD BE WHERE OIL IS COMING FROM.

Apr 21, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Oil gaskets got put on from oil leaking now car spuddering when taking off


CHECK TO MAKE PVC VALVE IN VALVE COVER WAS PUT BACK IN PLACE.

Mar 04, 2010 | 2000 Toyota Camry

1 Answer

Our Intrigue is blowing anti freeze. We have


The problem will have nothing to do with switching on the heater in the car.

The cooling system pressurizes and if there is a leak in the system the coolant will flow out the points of least resistance. If you are losing a gallon every 2 days the leak is major.

1. All elements of the cooling system need to be checked for leaks including the radiator core, all hoses including the heater hoses, all connections and all cooling system gaskets. I would also run a pressure test.

2. If everything in and on the system checks out then I would suspect coolant is leaking from a blown head gasket and running into the engine's lubricating system and into the cylinders.
If the car has been operated with the engine overheated at any time it is not hard to cause head gasket failure and other damage to the engine. Head gaskets can fail in some vehicles over time in any event. Pull the engine oil dipstick out a number of times and check the oil quality. If you see any traces of a whitish substance in the oil that substance is coolant and it is escaping through the faulty head gasket. Also after running the car, and checking the coolant in the radiator once it has all cooled off, you may also notice traces of oil in the coolant.

Do not drive the car any distance in this condition as you will run the risk of too much coolant escaping and the engine will definitely overheat potentially causing even more damage than might otherwise be found now.

Get the vehicle to a reputable auto repair shop and have the problem checked out.

If a faulty head gasket is the source of the leak, the head on the engine will need to be removed (to access the gasket) and the head and engine block inspected. This work will not be cheap especially if machine work on the head is required or if the head itself was found to be cracked.
Given the low market value of these 2000 build cars, you would have to consider if it was worth repairing in the event you were faced with major repair costs.

Sean

Dec 22, 2009 | 2000 Oldsmobile Intrigue

1 Answer

1997 nissan pickup 4 cylinder 1.8 ltr I believe. Oil is blowing back into the air filter. The small filter inside the air breather that catches the oil from the Rocker Cover gets filled with oil and...


has to have pcv or somebody took it out for some reason but if u are getting oil in the air filter like that most likly u hav a broke ring on one of your pistons

Oct 03, 2009 | 1997 Nissan Pickup

2 Answers

Blue smoke at exaust,oil coming through breeder hose


Check your PVC system my have stuck PVC valve

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Aug 11, 2009 | 1991 Toyota Camry

1 Answer

1996 Pontiac Grand Am Coolant in Oil


Hi Linda.

You have a major problem, first, don't run the engine at all! when there is coolant in the oil, running the engine can ruin it completely. the coolant will cause bearings in the bottom of the motor to seize, if not more cause more damage.

these engines are known for blowing head gaskets and intake gaskets. in this case, if you haven't ran the motor since finding the problem, the head gaskets can be replaced and the engine should be fine. I'd recommend doing the heads even if it's only the intake leaking. that would be cheaper than having to go back in later, and there isn't much further to the head gaskets after the intake is off.
also, have a new thermostat put in while this is all being done, it's cheap insurance!

If you know someone that has done head gaskets before, they should be able to tackle this without too much problem, otherwise if you'd rather a shop do the job, just make sure to tow or haul the car to the shop.

Jan 27, 2009 | 2004 Pontiac Grand Am

1 Answer

Oil leak


I own a shop, and you should check the oil sending unit, as they are bad to get cracked, and/or break causing a pretty bad leak. Check the valve covers, and more importantly, check the PVC to make sure it has enough vacuum on it, as it could be plugged up with carbon and not have any vacuum on it. Put a new PVC valve in it, as that will help. When an engine is allowed to build up pressure inside, it will push oil right past all the seals & gaskets, and on to the ground. We find a leak by wiping down the entire engine, or using an engine cleaner, and putting it on a rack with it running. That way we can see where the leaks are, and determine what to do to fix them. Glad to help out, Good luck!!!

May 14, 2008 | 1996 Buick Skylark

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