# 2007 Mercury Mountaineer ticking under the hood **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** mercury, mountaineer\ **Created:** [April 3, 2014, 10:15pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453 "2014-04-03T22:15:39Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 3, 2014, 10:15pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/1 "2014-04-03T22:15:39Z")
My parents have a 2007 Mercury Mountaineer, 100,845 miles. They change oil like a religion. It has under the hood ticking that increases and decreases with RPM. The ticking (tickity-tickity) sounds like when there is low oil. People have said,"You better put oil in there…"The oil is full. I can’t tell if the sound is coming from inside the engine, or if something on the engine might be loose that is causing the ticking as the engine RPM changes. From what I can remember from auto shop in the 80’s…it kind of sounds like valves/lifters. Also, it has a strange road noise that I think is coming from the tires. It sounds and sort of feels like riding on knobby off road tires. I can put it in neutral and turn off the engine, and the noise remains and decreases as the speed does, so it is not from the engine. Anyone have any ideas? Thanks in advance. ---
**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\ **Post date:** [April 3, 2014, 11:11pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/2 "2014-04-03T23:11:20Z")
I’m assuming your folks have actually checked the oil when the ticking occurs. How old is the serpentine belt? Try spraying some water on the belt to see if the ticking stops. For the road noise, does the pitch or volume of the sound change when the steering wheel is turned off-center? This indicates one or more bad front wheel bearings. Ed B. ---
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 3, 2014, 11:33pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/3 "2014-04-03T23:33:12Z")
I am currently driving it while my truck is getting the rear end replaced. I just went outside and checked the oil. Exactly on the top of the fill line, oil looks clean, but is ticking. This weekend I will hose the belt with water, experiment with the steering angle for the road noise, and report back. I know for a fact the serp. belt is original. THANK YOU! ---
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 4, 2014, 2:12am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/4 "2014-04-04T02:12:39Z")
Well, it stopped raining so I decided to pour some water on the serp. belt. No change. Thought maybe the radiator fan was clipping the plastic shroud, but didn’t seem so. I took a picture of the area where the ticking is the loudest. Passenger side of the engine compartment and seems to be coming from inside the engine. ---
**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\ **Post date:** [April 4, 2014, 2:54am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/5 "2014-04-04T02:54:10Z")
Those are your injectors. Take a piece of hose and put it in one ear and listen for the clicking. Move from one injector to the next until you find the culprit. The serpentine belt and tensioner need replacing. If this car has a timing belt it needs doing too. ---
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 4, 2014, 3:05am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/6 "2014-04-04T03:05:41Z")
Thanks knfenimore, I am a first responder/former EMT so I will take my stethoscope out of my kit and check things out. I never thought I would ever use it on a vehicle. 🙂 ---
**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\ **Post date:** [April 4, 2014, 3:14am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/7 "2014-04-04T03:14:16Z")
Injector tick is pretty loud and very easy to hear with a stethoscope. So you will easily hear all of them ticking. The question will be whether or not they all sound about the same (and about the same as the ones on the other side). But injector tick is normally not bad enough to raise any eyebrows or make a racket audible above everything else. My own guess is - because I think this has hydraulic valve lifters (lash adjusters) - that you have a collapsed lifter or two. ---
**Author:** ![wesw](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wesw/32/2713_2.png) [@wesw](https://community.cartalk.com/u/wesw)\ **Post date:** [April 4, 2014, 3:56am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/8 "2014-04-04T03:56:14Z")
could it be an exhaust leak? ---
**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\ **Post date:** [April 4, 2014, 5:33am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/9 "2014-04-04T05:33:32Z")
Where ever the leak is, the stethoscope will help you isolate it. When you find the noise post back and we can help more. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [April 4, 2014, 9:54am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/10 "2014-04-04T09:54:24Z")
Could be a collapsed cam follower . . . also known as “lifters” Substitute 1 quart of engine oil for 1 quart of Rislone Please report back with results ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [April 4, 2014, 4:10pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/11 "2014-04-04T16:10:45Z")
db4690’s suggestion is a good one, IMHO. Or, alternatively, the OP could add a can of Seafoam to the motor oil shortly before the next oil change. The cleaning power of the Seafoam could correct a lifter problem, but I would suggest not driving for more than…maybe 100 miles…before changing the oil. Even if it doesn’t help, it won’t hurt anything. ---
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 4, 2014, 10:05pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/12 "2014-04-04T22:05:50Z")
edb1961, on the road noise, turning the wheel to the right for lane change causes it to get quieter. More so on a hard right lane change. No difference when turning or drifting to the left. ---
**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\ **Post date:** [April 4, 2014, 11:28pm UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/13 "2014-04-04T23:28:53Z")
If the noise happens on a right turn, I believe the left wheel bearing is going bad. The right turn puts more stress on the left wheel bearing. If I’m wrong I’m sure somebody will correct me. Ed ---
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 5, 2014, 12:09am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/14 "2014-04-05T00:09:32Z")
Short of finding a large empty parking lot and driving in fast tight circles, it seems the harder the right turn the more quiet it gets. Left turns no change that I can tell. I’ll also wait for others. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [April 5, 2014, 4:28am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/15 "2014-04-05T04:28:13Z")
Please let us know what happens with the Rislone ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [April 5, 2014, 4:35am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/16 "2014-04-05T04:35:11Z")
This may not be of much help to you OP, but my early 90’s Corolla has had a slight ticking noise heard only at idle for the past 10 years. I used a garden hose to isolate where it is coming from, and it’s the alternator. ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [April 5, 2014, 4:41am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/17 "2014-04-05T04:41:34Z")
Front wheel bearing, one side or the other my guess. Any mechanic worth their weight and in ownership of a stethoscope will be able to deny this as a cause, but my wag! If you are driving down the road and turn severely (not enough to crash) and the noise varies, confirmed in my book. The ticking might be from a bad idler pulley ---
**Author:** ![hbockoven](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@hbockoven](https://community.cartalk.com/u/hbockoven)\ **Post date:** [April 5, 2014, 4:50am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/18 "2014-04-05T04:50:50Z")
db4690, the vehicle is actually due for an oil change. The dash indicator just popped saying it is time. I would change the oil and filter myself, but I don’t have any clue how to reset the indicator. Since the oil is full, I figure adding seafom or Rislone would over fill it. ---
**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\ **Post date:** [April 5, 2014, 5:04am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/19 "2014-04-05T05:04:21Z")
The owner’s manual should tell you how to reset the light. I can’t give you the exact procedure, but is quite easy and is done through either the menu on the trip odometer or through the message center if you have one. If you don’t have an owner’s manual you can probably find a pdf online and I would spend the time to do it. You don’t even know if the noise is valve noise yet, so personally I wouldn’t dump anything into the oil - other than oil. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [April 5, 2014, 7:00am UTC](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453/20 "2014-04-05T07:00:35Z")
@hbockoven‌ Here’s my advice Bring the car to your usual mechanic or shop for the oil change Ask them to substitute one quart of oil for one quart of Rislone Have them reset the oil change reminder Please report back on the ticking noise [Next page](https://community.cartalk.com/t/2007-mercury-mountaineer-ticking-under-the-hood/84453.md?page=2)