420A Oil leak locations?

[inix92]

Ok well iv done a decent amount of repairs to the car sense iv got it i was just wondering where most of the common oil leaks come from these 420a non turbo cars. im just hoping its not a head gasket

 

[Qking95]

I'm not sure if it's common on the 420a but im leaking oil from my oil pan seal.

 

[rstewart412]

Have you checked your valve cover? Oil filter? Those 2, the head gasket, and the oil pan gasket are the only spots I can think of.

 

[Th3DooM]

Definitely the valve cover. Mine is leaking all the way around. Even the spark plug tube seals are leaking like hell. I saw different 420as with the same problem. I also heard that the gasket between block and head is often leaking since there was a manufacturer failure by Chrysler.

My oil pan and filter isn't leaking at all. Guess I'm lucky, haha.

 

[inix92]

I did the valve cover about 2 weeks ago but i did not switch the bolts that hold the cover on that could possibly be a reason as well, every time i go underneath the car i always see fluid pretty much all underneath the engine bay.....

 

[rstewart412]

Yeah if you get a new valve cover, I would highly, highly recommend permatex. You may already know that, just thought I'd throw it out there. I use permatex everytime i replace a gasket. But not in place of a gasket just with it.

 

[Th3DooM]

Did you try to clean the (whole) engine so you can locate the leak ?

 

[inix92]

well iv thought of it just never got around to doing it but as soon as my car is up and driving again thats what im going to end up doing it.

 

[rstewart412]

I did the valve cover about 2 weeks ago but i did not switch the bolts that hold the cover on that could possibly be a reason as well, every time i go underneath the car i always see fluid pretty much all underneath the engine bay.....

I usually don't replace the bolts when i take the valve cover off. If it is leaking from the valve cover than chances are you probably just didn't seat the cover right on the gasket. Maybe the gasket slid a little when you were getting the cover on?

 

[crazyboy81]

You only need RTV on the tight corners of the head when changing the VC gasket. I did this like 3 weeks ago and its perfect, no more leaks. Another leak can come from the oil pressure sensor on back of block, if it is not screwed in enough with pipe thread sealant. After fixing those two spots I have a really slow leak instead of a constant leak . Still can't identify the culprit.

 

[rstewart412]

Yeah RTV. That's what I was thinking of. Permatex is just a brand.

 

[inix92]

I used rtv all around the valve cover every 3 or so inches to make sure its nice and tight.

 

[rstewart412]

Hmm then I can't really think of anything else it may be except maybe the oil pressure sensor like crazyboy81 said.

 

[inix92]

Yeah im just going to end up cleaning my entire bay in about a week or so and try and locate where the leak is coming from most likely put in some uv fluid and see where its coming from. Thanks for all suggestion guys.

 

[studabaker]

Last year in the rain i got stuck on an small island. oil pan has minor dentage. oil seems to be leaking out and burning out side a little. is there an oil pan gasket or just no longer a perfect fit? no damage to oil filter i probably need a new oil pan? i plan on getting it fixed but very minor leak. I think it drips back to exhaust and burns, or something. it smells sometimes when i push it a little.

 

[FoXracing82085]

I replaced my valve cover, valve cover gasket, oil pan, oil pan gasket, and oil filter trying to fix my oil leak in all possible ways that was easy. I also used the permatex on my gaskets as well. However I still have an oil leak from around the oil filter area. Any clue on where it could be leaking from? Could it be the oil filter housing itself?

 

[studabaker]

I am not a mechanic but from driving my car with this minor leak there is less oil at times at which point there seems to be less resistance on the internals when at high rpm. High rpm must generate pressure on oil maybe this is forcing oil out the weakest point rather than into the combustion chamber. This is an uneducated speculation that would suggest this oil leak is better than compression leak...? I had a worse leak on my motorcycle that the new oil pan solved but it would make a more knocking sound on lower oil when cold but seemed to Rev higher easier with less oil.

 

[SuperFudge]

^^That's a very good point.
But on my 95 Talon ESI it had a leaky valve cover gasket, oil pan as well because at one point someone over torqued the pan causing it to bow between the bolts thus causing oil to pass through, and lastly i had a head gasket go bad.

 

[timmytownsend88]

i have the same thing with my 99 i have pics let me know what u guys thinks

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is there supposed to be a bolt in the little screw hole or what?

 

[Frank_The_Tank]

i have the same thing with my 99 i have pics let me know what u guys thinks

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is there supposed to be a bolt in the little screw hole or what?

That's just for a bracket that holds a plug there. It's just to keep things tidy and easily accessible. I don't know what those wires and plug are for, but that's what the hole is for.

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[Myndvast]

You only need RTV on the tight corners of the head when changing the VC gasket. I did this like 3 weeks ago and its perfect, no more leaks. Another leak can come from the oil pressure sensor on back of block, if it is not screwed in enough with pipe thread sealant. After fixing those two spots I have a really slow leak instead of a constant leak . Still can't identify the culprit.

Yeah I've used it too. It works pretty well; you just have to let the car sit for curing time (which isn't too bad considering your leak will be gone.) I had a major leak around my oil pan. Turns out that when I looked under the car, all of the bolts on my oil pan had backed out except one. I ended up getting a new rubber gasket from the local auto parts store and a new oil pan (mine had two dents in it from 16 years of use.) I also did the valve cover and spark plug gaskets. So now the top part of my engine is leak free, the bottom is leak free too, but the middle seems to have a couple of leaks. I have confirmed that one leak was from the dipstick where the rubber stopper was severely worn. This caused the stick to disengage when under pressure and oil to leak out and cover my engine. I replaced that with a dipstick from Mach V Motorsports. It fit the shaft but the dipstick is a couple of inches shorter than stock. So I will just keep the stock one and use it for maintenance only. However, the new dipstick did the job on stopping the leak from the dipstick shaft. My question is: Just where is the oil sensor located? I saw something that could be leaking on the back of the engine, but I just want to confirm it before I go and replace it. Also isn't the oil pressure sensor what I have to connect my new oil pressure gauge too anyway? Oh yeah does anybody have a picture of it?

 

[dsmgetsyoulaid]

oil pan

 

[NeMiZiS]

That's just for a bracket that holds a plug there. It's just to keep things tidy and easily accessible. I don't know what those wires and plug are for, but that's what the hole is for.

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Mine doesn't have a plug there.

 

[XiKeiyaZI]

Your leak could be found anywhere the Red Circle encompasses.

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On a serious note - Go wash your engine bay down, drive the vehicle for a few days, and then go back over it looking for fresh fluid. It's a lot easier to find leaks on a clean surface.

 

[Myndvast]

On the backside of my engine I found what looks to be a leak that extends down to the bottom of my tranny. It looks like it could be coming from one of two sensors or something.

http://www.dsmtuners.com/gallery/files/9/2/0/2/7/img_2566.jpg

http://www.dsmtuners.com/gallery/files/9/2/0/2/7/img_2571.jpg

As you can see, my block is covered with oil. What are the two sensors and do any of them have a history of leaking? Anybody seen this before?[/IMG]