1994 Explorer have tons oil inside intake mainfold

[Milwaukee]

Well I am tried find out why there so much oil inside throttle body.

It run ok but minor little miss on idle but that was 500-600 when in gear.

It start drink oil FASTER when temp are 25oF or below. It would come on dashboard say LOW OIL level. That is USEFUL for me. I carry 5 spare oil for these.

about 1K miles 1-2 qts.

It keep have temp gauge swing randomly. Now I am put motorcraft theromstat today.

When I bought it was COLD on gauge so I put aftermarket gauge now it READ way HIGH it turn there 5 coolant leaks so after repair whole expect 1 that was drip when cold. It start stability stay 200oF but couple times it rocket to 225-230oF then bam it drop to 180oF. No coolant in oil or smoke.

New radiator since old one was badly shape it leak when COLD.

PVC valve I replaced with new Fram pvc so do I should get motorcraft pvc? I haven't able find at auto parts stores near here.


By Way 1994 Explorer 4 door 4wd with Automatic. Came from Tenn with 150K miles. Bought 3 months ago now 158K miles.

 

[llamaking122]

im sorry but i cant understand that at all.

 

[Roadrunner777]

I think you are on the right track. My first theory is that you are drawing oil laden air through the PCV (Positive Crankcase Ventilation). Sounds like way too much oil laden air. This could be bad rings. Or the PCV valve is defective. Or something internal is causing oil to pool under that valve. If you run the engine with the PCV valve disconnected from the valve cover, then some air will be coming out the hole were it went. It should be closer to puffs of air rather than a strong stream of oil droplets. A shop could diagnose this in less than 30 minutes. The bad news is that it doesn't get much worse than bad rings. A compression test and spark plug inspection may be helpful.

I have also seen this when there is too much oil in the engine. New oil is hard to spot on a dipstick, be sure you correct on reading this. I killed an engine once this way.

You have found and repaired leaks, good start. These engines can retain air in the cooling system and cause strange temperature fluctuations. Look in other threads for burping procedures.

 

[Milwaukee]

Consider this explorer came from Tenn where tons mountain. Owner is woman so she consider maintaincer because she keep receipt and mileage.

Worst mileage for her was 6 and best 14. That was record from first day she own to 2006 then give to her brother in MI then it been sit for 4 years before I bought.


I open oil cap and watch while hot idle. No white smoke and I put my hand on I don't feel pressure that show me rings is good. I have geo tracker that have serious BLOW OUT when you open oil cap it puff white.



New motorcraft thermostat installed and test. Not happy with it. It run HOTTER than normal. it stay 210-220oF. I open check radiator it was definably WARMER than it was with old thermostat it was cooler on radiator.

I watch coolant level in radiator when I rev to 2K it drop down like couple inches so it show me that water pump is actually work fine.

But trouble start this after I replaced radiator and thermostat 7K miles ago.

Old theromstat and gauge wasn't work correct. One time It OVERHEAT very bad that gauge finally work then sudden go back cold.

 

[Milwaukee]

Sorry for my poor English due my First Language is ASL= American Sign language.

 

[Roadrunner777]

Does the PCV valve seem normal? It does the springy clicky thing if you shake it? Might be interesting to run without the PCV for a little while and see what happens. I don't really have a solid reason to suggest this, but it might shed some light on the problem. I'm out for the rest of the day, I'll check with you on this thread tomorrow. Good Luck!

 

[Milwaukee]

Does the PCV valve seem normal? It does the springy clicky thing if you shake it?

Yes it rattle. Old one were ORIGINAL motorcraft it white plastic it wasn't rattle and there burnt black on bottom.

 

[Roadrunner777]

Thought I would peek back in before dinner. I'm having trouble tracking your timeline, and it also looks like you are working 2 problems at the same time. Let's try and look at this as it stands today. History is good, but it can get in the way sometimes. What are your symptoms today?

 

[Milwaukee]

Thought I would peek back in before dinner. I'm having trouble tracking your timeline, and it also looks like you are working 2 problems at the same time. Let's try and look at this as it stands today. History is good, but it can get in the way sometimes. What are your symptoms today?

Tried tow my miller welder on trailer which 2K pound it feel like extremely sluggish and rpm stay 3K rpm until you get up speed. That was back in Summer.

Replaced theromstat with cheap $5 it run ok just tons of swing temp from 170oF to 230oF.

Remove heater core valve they were leak.

Replaced theromstat with motorcraft now. It run at 210-220oF with slightly swing temp.

Why it running hot. Head gasket is ok and intake manifold gasket I don't know. Compressor is 170-175 psi


It drink oil very fast no burn or smell. When we look at intake mainfold from throttle body there were oil puddle inside.

 

[Roadrunner777]

Problem #1, Running hot: Check fan clutch, but 220 isn't really that hot.

Problem #2, oil consumption: Sounds like this was due to bad PCV valve, clean out oil puddle and run with new valve, check for puddle in 1,000 miles.

Tow in Drive, not OverDrive. 2K may be too much to pull on a regular basis. You might want to review the towing section of the forum.

 

[Milwaukee]

Yeah that why I look at explorer with v8.

Only I need tow up 5K couple times a year. I manual put in 3 because I read that 4 gear is too weak to tow or break band inside transmission. I upgrade to BIGGEST transmission cooler on it.

It was run 190-200 with cheapo thermostat when I replaced with Motorcraft now it stay 210-220oF.


I have went to all auto stores ever pop's store. None of them have hydrocarbon test on coolant

I been watch like hawk on coolant in radiator for like 10 mins I don't see bubble or stir. It just stay steady I ever rev to 2K and 2500K it drop then raise.


By way I have incorrect muffler on. It come from 83 Cougar 3.8L so I am plan put bigger muffler if I can find.

 

[huntman58]

I think I will jump in here for a bit
On the cooling.

You’re not over heating. The thermostat you removed may have been a 190 deg one and the Motorcraft one you put in to replace it was most likely a 195 deg one. Now that being said that would account for the 10 to 15 deg hotter running temp and the more stable gauge reading also. The swing you are seeing is the thermostat opening up to let the hot water out to cool in the radiator and this is why you’re seeing a few deg changes on a gauge especially if it is a mechanical gauge as they tend to read a bit faster the changes in my opinion the electrical ones. Both are better then the stock one as that is only a guess or idea of what it is doing and no real temp reading.

Okay on to the oil problem

This is my opinion again but to me it sound like you may have had a bad PVC valve being stuck most likely closed.
Now to make sure. When you did the compression test did you do it on all 6 cylinders or just a few? If just a few you need to do it on all 6 and write the reading down. Do this at lest three times each so you get good readings. If any one or two are low squirt a small bit of motor oil in the cylinder (about a table spoon or so) and take the reading again. If it go's up bad rings if not then vales are the most likely problem.
Also check the air tube from the Mass air flow sensor to the throttle body for any oil build up. I think that with the PVC valve stuck closed it is possible that you could be pressuring the motor when its running at speed (this is why when you placed your hand over the fill cap you did not feel it but you should have felt a light vacuum) and getting the oil to blow in to the air feed tube from the oil fill cap. This would happen as I believe it may have with a clogged or stuck closed PVC valve. it would make the motor create a hi pressure problem in the lower part of the motor and that will make oil blow past the rings and out the oil fill cap into the air feed tube into the throttle body and the upper intake manifold were it would then have time to collect on the sides and even pool up. if this is the case it would be a good idea to remove and clean the throttle body, upper intake manifold and the air intake tube to remove any built up oil in them also so that you will not still be mixing oil and air together down the line even after fixing the problem but only hiding the fix because of the oil in these parts.

Good luck and by the way you’re easy to under stand. I am dyslexic so my written skills are not that great also and my ex wife was an interrupter that used ASL. I did pick up a few words from here like the easy simple ones that are good to know in public so you do not have to shout like yes , no , bathroom and things like that. So as one to another welcome and do not worry about the writing skills as the message still comes threw believe me.

 

[Milwaukee]

cheap thermostat is 198oF

Motorcraft thermostat is 190oF.

I went bought new fan clutch.

Let say it didn't ever work. It currently running hot when stop.

I am think sell this and buy another explorer with manual transmission.


I am feel angry and spend tons money on this and new issues come everytime.

 

[huntman58]

Yeah that why I look at explorer with v8 Only I need tow up 5K couple times a year. I manual put in 3 because I read that 4 gear is too weak to tow or break band inside transmission. I upgrade to BIGGEST transmission cooler on it. .==
can be also done with a V6 if set up right and only now and then and not for long distances say like 500 miles each way over moutians and such.
NEVER TOW IN OVERDIVER NO MATTER WHAT TRANNY OR MOTOR!

It was run 190-200 with cheapo thermostat when I replaced with Motorcraft now it stay 210-220oF. =
Not really over heating with the right mix antifreeze and distilled water when using a 195 degree thermostat. This is also about were mine runs both towing and not on the flats. It dose get a bit warmer when climbing hills or with heavy loads. I have a 1993 V6 OHV with the a4ld tranny and it is 4x4

I have went to all auto stores ever pop's store. None of them have hydrocarbon test on coolant=
I have never done this so can not help you. I just use my eyes and nose so if it looks right and smells right I normaly feel okay with it at that point.

I been watch like hawk on coolant in radiator for like 10 mins I don't see bubble or stir. It just stay steady I ever rev to 2K and 2500K it drop then raise.=
This is very normal and nothing to worry about at all

By way I have incorrect muffler on. It come from 83 Cougar 3.8L so I am plan put bigger muffler if I can find. = May not be the best thing to do for it and changing to say a flow master or any other high flow muffler of the right size will only help you and in the long run is well worth the dollars spent for it.

 

[huntman58]

cheap thermostat is 198oF

Motorcraft thermostat is 190oF.
Test the thermostat by hanging it in water to see what temp it opens at and then closes at. May say 190 but could be a bit hotter or colder. I always test them ever new ones as some I have gotten even new did not work right even comeing out of the box.
Also have you flushed you whole cooling system out meaning Motor Radiator and heater core? If not may want to as you could have a blockage in the system some were or a restriction.

I went bought new fan clutch.

Let say it didn't ever work. It currently running hot when stop.
How hot is hot what is the temp reading when you’re saying hot?

I am think sell this and buy another explorer with manual transmission.
Most autos have a higher tow rating then manuals so you may want to think about that. my 93 4.0 V6 OHV with to package is rated for 5800 LBS tow with a class 3 hitch and 3.73 gears same set up with a manual is only rated at 3500 lbs if I am not mistaken from the factory.



I am feel angry and spend tons money on this and new issues come everytime.
O the joys of owning any auto there worse then a mistress always taking your money and in the end making you wish for some thing newer and shinier LMAO

 

[Milwaukee]

It stay 200-215oF sometime it creep to 220oF.

Coolant is clean and heat core is good. It blow so hot air that burn my hand if I hold there.

Radiator only had 7K miles it brand new.

I can feel gurgle in top radiator hose when thermostat OPEN it feel gurgle in hose.

I maybe give 1 chance but I keep worry if it head or gasket.

 

[Roadrunner777]

Hydrocarbon kit: http://www.rxauto.com/products.php?cat=10

The local shops here charge about $30 to do this test.

 

[Milwaukee]

It hit me in my face. Last time when I tried fix leak on temp gauge's sensor on. It use adapter to fit.What happened that sensor doesn't stick future than adapter so air trap inside adapter. When I remove there coolant pop I put white tape. And temp gauge stay 190oF ALL TIMES Until I have new leak and it went back old fashion.

I will try remove that temp gauge sensor off tomorrow since it too hot now due 50 miles drive. I hope it FIXED.

One thing I am worry it blow EXTREMELY EXTREMELY HOT air though vent. If you hold your hand about 1" Wait 10-15 sec it burn your hand. Is that supposed to be normal? I never have cars with VERY HOT HEAT.


We check PVC valves. I have friend hold his hand on oil cap while I rev. He say he feel it BLOW out little. That mean PVC Valve is broke. IT FRAM so I will try get motorcraft PVC valve.