3.7 Valve woes - Mustang Evolution

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Old 07-17-2015, 08:36 PM   #1
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3.7 Valve woes

First, yes i used the search button

So i have read countless articles, forum posts, and such regarding a valve noise coming from our engines. The problem is explained as a rattle, tap, noise when it cold and eventually goes away when it warms up. Which im sure tha'ts no fun either, but mine does the opposite of that, it becomes louder as it gets warmer, and the best way to describe it is it sounds like a card on a bike wheel but sharper and more metallic.

Its coming from the driver side valve cover,
Its the worst when holding it at around 2-2.3K rpm,
goes away (or is muffled) under a moderate to heavy load.
It does raise and lower with engine speed.
Its LOUD, like it reverberates off of passing cars and walls.

There's so many post on this type of thing i cant even begin to put a solid answer together, just looking for some insight,

Thanks!
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Old 07-17-2015, 08:51 PM   #2
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Are you the first owner? Was wondering about oil change history, etc.
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Old 07-17-2015, 08:55 PM   #3
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No i am the second owner, bought it with 52K on it. So god knows, i switched it over to mobil 1 the day after i bought it and have done it every 4k since and i'm at 62k now.
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Old 07-17-2015, 08:57 PM   #4
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Was it a rental? God knows what people do with a rental Mustang. Oh wait yes i do.

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Old 07-17-2015, 08:59 PM   #5
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Luckily that is one thing i could be sure of, it wasn't a rental. I actually met the previous owner when i bough it, she was picking up her 2015 GT the same day i picked up mine.

Yeah i was jealous.
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Old 07-17-2015, 09:07 PM   #6
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That would bother the hell out of me. I have also read quite a few post on this but most are just told "its normal" from their dealers.
I'm going to watch this thread. Good luck!


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Old 07-17-2015, 09:09 PM   #7
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Just cuz it was a woman doesnt mean she didnt dog the hell out of it. If she was getting a GT, then you know she wanted more power. Something tells me she couldnt go fast enough with the v6....
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Old 07-17-2015, 09:12 PM   #8
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Oh i had a feeling anyone moving from that to a 15 GT was looking for more power. I've seen both sides of the gender spectrum tear the hell out of a car.

None the less, on a scale of 1 to fubar'd..... where does this problem seem to sit, im going to try my dealer tomorrow.
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Old 07-17-2015, 09:49 PM   #9
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Without opening it up, it would be hard to tell. As long as the car runs ok, then you should be fine for now.
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Old 07-17-2015, 09:56 PM   #10
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If i open it up, (thank go its the drivers side) what am i looking for? A marred cam lobe? Marred follower?
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Old 07-17-2015, 10:12 PM   #11
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Does the car run funny at all?
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Old 07-18-2015, 01:08 AM   #12
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Also, have any mods? What octane gas do you use? Just collecting info.
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Old 07-18-2015, 02:23 AM   #13
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Hydrolic lifters? Not pumping up or not staying pumped up?
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Old 07-18-2015, 09:25 AM   #14
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If you're really worried do a compression / leak down test. If its a valve issue, you will see it there. The easiest fix may be to just step up to a thicker oil, whats the factory like 5w-20? Throw a 5w-40 in there (i run rotella T6 in ours) and see if it doesnt clear things up.
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Old 07-18-2015, 11:17 AM   #15
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Thicker oil- You really gotta be kiddig

Mobil-1 5w 20 is what it calls for. You already have good oil in it and just try adding some Chevron Techron to the gas to clean out the injectors. That may or may not solve the problem.
Some of these guys will have people putting sawdust in the rear or crankcase to quiet down a problem like the shady dealers did in the good old days.

Thick oil will be quieter but really not a good option. Rotalla T6 oil for use in a turbo diesel is good for voltwings engine or a truck but I sure as hell would not use it in my Mustang.

Before you do anything, Take a long screwdriver and put it to your ear and to the valve cover to be sure that is where the noise is coming from. They do sell Automotive stethoscopes for this but the long screwdriver works pretty good.

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Old 07-18-2015, 11:45 AM   #16
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SeaFoam also works wonders on sticky/noisy injectors.
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Old 07-18-2015, 12:12 PM   #17
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Kevin- Just your typical intake exhaust, nothing real involved yet, i run 89 most of the time. it does not really run bad at all.

Voltwings, i dont think the vale is not seating correctly i think the cam to valve contact point is the issue

Ronnie, ill go try that trick with the screw driver now.
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Old 07-18-2015, 01:51 PM   #18
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Let us know how it sounds

Listen to both sides and see if the passenger side has the same noise but not as loud.
Ronnie
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Old 07-18-2015, 03:31 PM   #19
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Quote:
Originally Posted by ronnie948 View Post

Thick oil will be quieter but really not a good option. Rotalla T6 oil for use in a turbo diesel is good for voltwings engine or a truck but I sure as hell would not use it in my Mustang.

Ronnie
The reason rotella T6 is good in Turbos and diesel engines is because even though it is thick, it easily flows through tiny passages, such as turbo feed and drain, and doesn't break down due to heat. This makes it a fantastic oil for damn near any engine, and i can show you several black stone lab reports to prove that.

There are a lot of parts in these TI-vct engines that rely on oil pressure to operate, hell, the Cams have their own oil pressure regulators. In the summer months when oil is more likely to break down, especially if you're using cheap oil, and the systems are seeing too low of pressure, it can cause an issue. This is specifically why the track pack GT has a 5w-50 spec oil. The 5w-20 is just a thin oil to help the v6 hit it's mpg targets.

Thicker oil would not only be a remedy, but a diagnostic approach as well.
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Old 07-18-2015, 03:56 PM   #20
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Originally Posted by Meaningoflife90 View Post
No i am the second owner, bought it with 52K on it. So god knows, i switched it over to mobil 1 the day after i bought it and have done it every 4k since and i'm at 62k now.
I'm wondering, why would you buy Mobil 1 and swap it every 4k miles?


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The reason rotella T6 is good in Turbos and diesel engines is because even though it is thick, it easily flows through tiny passages, such as turbo feed and drain, and doesn't break down due to heat. This makes it a fantastic oil for damn near any engine, and i can show you several black stone lab reports to prove that.

There are a lot of parts in these TI-vct engines that rely on oil pressure to operate, hell, the Cams have their own oil pressure regulators. In the summer months when oil is more likely to break down, especially if you're using cheap oil, and the systems are seeing too low of pressure, it can cause an issue. This is specifically why the track pack GT has a 5w-50 spec oil. The 5w-20 is just a thin oil to help the v6 hit it's mpg targets.

Thicker oil would not only be a remedy, but a diagnostic approach as well.
Ive heard you could get 2 different weights. 1/2 5w20 the other half 5w40 the heavier oil will help with the preasure while the lighter oil keeps everything going smoothly. Honestly it sounds like a jacked up mess and for me doesnt sound right at all.

Also has anyone used Marvel Mystery Oil before?
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Old 07-18-2015, 04:43 PM   #21
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I used some Marvel Mystery oil long ago on a 1990 Ranger crankcase. It caused the cork oil pan gasket to deteriorate and plugged up the oil pump pickup. Had to pull pan, replace gasket & as preventable maint the oil pump.
I don't use it in modern engines today.


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Old 07-18-2015, 06:41 PM   #22
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[QUOTE=Fintile;2262633]I'm wondering, why would you buy Mobil 1 and swap it every 4k miles?

I like working up into longer intervals, i dont know, i feel more comfortable that way. apparently it did a whole fat lot of good....


Update! now that i really stuck my head in there and had someone hold it at 2k, i sear it sounds like its coming from the front top of the driver valve cover.
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Old 07-19-2015, 08:26 AM   #23
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Sounds like a cam phaser.
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Old 07-22-2015, 04:02 PM   #24
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Quote:
Originally Posted by Shadetree43 View Post
I used some Marvel Mystery oil long ago on a 1990 Ranger crankcase. It caused the cork oil pan gasket to deteriorate and plugged up the oil pump pickup. Had to pull pan, replace gasket & as preventable maint the oil pump.
I don't use it in modern engines today.


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You 100% with no doubt that was the cause? I used it in every oil change and every 3 gas fill up on my 2004 Hyundai from 10k miles 170k miles later my brother drove it cross country with me and he has it here in Boston. Ive just never used it in my Mustang. Im guessing i shouldnt. Im just going to stick with the motercraft semi-synth that Ford puts in the car. This is the um-teenth time Ive heard someone having a valve issue, idle issue or just noise period after using an aftermarket full synthetic. Makes me reconsider getting new tranny fluid now.
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Old 07-24-2015, 06:38 PM   #25
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Well! Got the news today!

Cylinder 5 is coming apart, either at the wrist pin or a rod bearing, it goes away when you deactivate the cylinder and there is metal in the oil.

yee
freaking
haw
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Old 07-24-2015, 06:53 PM   #26
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Holy s*** i didnt even know this happened on our cars. Guess "built ford tough" is out of the question...
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Old 07-24-2015, 06:55 PM   #27
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Did you buy your 2012 brand new ??????

How many miles on it now????

I hate to hear your bad news and hope it does not cost you way to much to fix.
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Old 07-25-2015, 12:25 PM   #28
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69k Miles on it is all.

Yeah ford told me 7000 for a long block, i think ill risk a used on at this point.
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Old 07-25-2015, 12:33 PM   #29
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Hit up Alrefire, i feel like dude just has them laying around at this point
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Old 07-25-2015, 07:42 PM   #30
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Call ford up directly and ***** at them. They will work with you.
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Old 07-26-2015, 09:03 AM   #31
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Quote:
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Hit up Alrefire, i feel like dude just has them laying around at this point
Lmao
No, I only have 2 motors.

You can find a decent used one for pretty cheap.
Just be careful with picking one, my spare motor has an oil leak. It's coming out in a month or so, so I'm not too concerned with taking it apart to fix it now.

If I purchased from lkq, it'd be covered under their 6 Month warranty... but..... I'm cheap lol

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Old 07-26-2015, 11:39 AM   #32
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Holy s*** i didnt even know this happened on our cars. Guess "built ford tough" is out of the question...
Thats just their trucks. With their cars (the Mustang in particular) it's "FORD BUILT TOO MANY" constant mass production and "half 'ed" quality standards is why we have these issues. youd never see this in a Toyota or hell not even the Genesis Coupes have seen as many issues as our V6. I think this is a sign for you to do a 5.0 or go all out with a GT500 crate swap!

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69k Miles on it is all.

Yeah ford told me 7000 for a long block, i think ill risk a used on at this point.
7000 will get you a working used 5.0 with harness. trans is another 2-3k depending where you find it... I could be wrong though.



I gotta say considering the issue with the amount of time you have had this issue and Im sure youve driven the car hard a couple times tells me its still has a pretty solid build.
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Old 07-26-2015, 12:41 PM   #33
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Hi Meaningoflife90

I know I asked before if you bought the Mustang "BRAND NEW"
I'll ask again because you never said.
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Old 07-26-2015, 02:25 PM   #34
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I know I asked before if you bought the Mustang "BRAND NEW"
I'll ask again because you never said.
Ronnie
He answered that in the 3rd post. He bought it used with 52,000 miles on it.
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Old 07-26-2015, 05:42 PM   #35
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Thanks iguanaman3

I sure don't know how I missed that but I did.

I'm wondering if the person that had it before used crap oil or maybe did not change it at all. It is rare for the 3,7 V6 to have any problems. They have been using that engine in trucks with zero problems.

69,000 miles is not a lot on a late model car of any brand.
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