Engine Tick after oil change - Defender Source
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  #1  
Old November 1st, 2010, 08:09 PM
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Engine Tick after oil change

So I just changed my oil for the first time and added Mobil 1, 0-40W. The level is good, but now there is a very noticeable ticking noise coming from the engine at idle and while driving. The ticking was barely audible prior to the oil change, but it did exist. I am assuming the oil isn't thick enough and that I should do one of the following:
A) Attempt to adjust the lifters or rockers.
B) Change the oil again for something thicker.
C) Do nothing since I know there is enough oil in the system.

Any recommendations?

Thanks.
Rob
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  #2  
Old November 1st, 2010, 09:19 PM
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how many miles? i assume you're a 4.0 V8 being a '97 NAS? 0W-40 is pretty thin for an engine with high mileage that didn't come from a thinner synthetic IMO...
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Old November 2nd, 2010, 06:25 AM
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Yes, 4.0 V8 with 51,000 miles. Not sure if synthetic was being used before, but I chose the 0W-40 based on recommendations on this website.
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Old November 2nd, 2010, 07:44 AM
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Was the ticking coming from the same area before the oil change?
Does your oil light flicker?

I recommend Option B
Change to a thicker oil i.e. 10W-30
As the engine wears, the clearnance between the bearing jounals and the bearings increase. A thinner oil will cause pressure loss.

BTW, the hydraulic lifters and non-adjustable.

Good luck...

Cheers...
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Old November 2nd, 2010, 09:14 AM
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Quote:
Originally Posted by gas-man View Post
Yes, 4.0 V8 with 51,000 miles. Not sure if synthetic was being used before, but I chose the 0W-40 based on recommendations on this website.
oh wow, thats a lot less than i thought it would be.
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  #6  
Old November 2nd, 2010, 09:34 AM
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Do you happen to have an oil pressure gauge or just the idiot light?
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  #7  
Old November 2nd, 2010, 09:39 AM
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Maybe add some Lucas Synthetic. It'll thicken the oil and the tick should quite down.
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  #8  
Old November 2nd, 2010, 12:55 PM
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I don't have an oil pressure gauge, only the instrument cluster lights. The oil light only comes on when I start the car, then goes out immediately. Thanks for the tip, I will look into the lucas synthetic oil product.
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  #9  
Old November 2nd, 2010, 01:27 PM
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I suggest driving it for a while as is. The noise is most likely from a worn rocker shaft due to prior neglected maintaince. It either will go away in time as the motor cleans itself out and oil works its way to the top of the motor again, or it is pretty easy to replace the rockers.

Does the motor look sludged up? Are the PCV tubes clear?

Thicker oil (mobil one is 40w when hot) will not solve the issue, at best it will mask it and lead to further issues down the road.
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Old November 2nd, 2010, 02:08 PM
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You can pick up the Lucas at any auto parts store.
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  #11  
Old November 2nd, 2010, 09:28 PM
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I've had a somewhat similar problem with mine. I bought my 90 last year with 56k miles and I have no idea what oil it had but it didn't tick. The place I bought it from had just changed it so I let it go until 59k when I put mobil 1 0W-40 in it. Ever since, I get a couple ticks when it starts up after it has sat for at least a few hours. Nothing while driving like you've got though. I'm at 65k now and I just bought Rotella syn 5W-40 today so I'm going to give that a shot this weekend and see if it is any better with the "5W" instead of the "0W".

The mobil 1 0W-40 really pours like water compared to the 10W-40 regular stuff I'm used to so I'm wondering if more of the oil is draining back into pan instead of sticking to the components or something? Maybe the oil pump is losing its prime? The oil light does flicker on when it ticks occasionally.

If you switch oils let us know how it goes. I'll report back with what I find.
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  #12  
Old November 2nd, 2010, 10:18 PM
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I do recall someone else having this issue before during idle. It was thought to be the cam shaft floating causing a tick. Once changed from thin oil to thick oil, the ticking stopped. The thick oil put just enough resistance on the gears to take the play out of the cam shaft...

Cheers...
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  #13  
Old November 3rd, 2010, 05:38 AM
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What is it with people, trucks start acting shitty so they expect preventative maintenance to fix it? Reminds me of those, "well I changed the transmission filter now it wont move" threads..


Id be looking at lifters or rockers. Try marvel mystery or some transmission fluid. I had an oil passage get blocked on my Range Rover when i first had it, using Mobil and Marvel Mystery loosened some sludge up and blocked an oil passage in the top end, i flogged the truck and it passed what was blocking it, bad idea but it worked.
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  #14  
Old November 3rd, 2010, 08:08 AM
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One thing to remember is this engine was basically designed in the 1950's and put into production in the early 1960's when plain 'ol 30w oil was the standard. Synthetic multi-weight was unheard of back then.
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  #15  
Old November 3rd, 2010, 08:49 AM
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Actually, synthetic oil was used in WWII aircraft.
As far as viscosity goes, all of the multi grade oils in a way synthetic since various compounds are added to achieve the requirements of the viscosity rating.
That ticking is the valve lash/ hydraulic lifters. It probably was present prior but masked.
One thing to remember about the synthetic oils is that they don't have as much friction nor the ability to hold metals in suspension. That's why they are sometimes avoided durring an engine break-in.
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Old November 3rd, 2010, 12:47 PM
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So if the ticking is the valve lash, how do I adjust them? I remember doing this 15 years ago to an FJ40 I had, wiggling a thin piece of metal between the lifter or rocker. Would the procedure be in a manual? I picked up one of those RAVE CD-Roms for the defender on Ebay.
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  #17  
Old November 3rd, 2010, 01:27 PM
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Quote:
Originally Posted by Grover View Post
Change to a thicker oil i.e. 10W-30
???

10W-30 is thinner than 0W-40....

The second number indicates the viscosity at normal temperature.

A 0W-40 has the same running viscosity as a 15W-40.

------ Follow up post added November 3rd, 2010 11:29 AM ------

Quote:
Originally Posted by gas-man View Post
So if the ticking is the valve lash, how do I adjust them? I remember doing this 15 years ago to an FJ40 I had, wiggling a thin piece of metal between the lifter or rocker. Would the procedure be in a manual? I picked up one of those RAVE CD-Roms for the defender on Ebay.
Valve lash is not adjustable. They use hydraulic lifters that are meant to automatically pump up and remove valve lash.
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  #18  
Old November 3rd, 2010, 05:37 PM
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Quote:
Originally Posted by Frank84 View Post
I've had a somewhat similar problem with mine. I bought my 90 last year with 56k miles and I have no idea what oil it had but it didn't tick. The place I bought it from had just changed it so I let it go until 59k when I put mobil 1 0W-40 in it. Ever since, I get a couple ticks when it starts up after it has sat for at least a few hours. Nothing while driving like you've got though. I'm at 65k now and I just bought Rotella syn 5W-40 today so I'm going to give that a shot this weekend and see if it is any better with the "5W" instead of the "0W".

The mobil 1 0W-40 really pours like water compared to the 10W-40 regular stuff I'm used to so I'm wondering if more of the oil is draining back into pan instead of sticking to the components or something? Maybe the oil pump is losing its prime? The oil light does flicker on when it ticks occasionally.

If you switch oils let us know how it goes. I'll report back with what I find.
If you get oil light at idle, remove the oil pan and clean out the oil pick up asap. Also check you do not have a leaky injector dumping gas into the oil (oil smells like gas and is thinner than it should be).

The chug chug chug sound (like a steam train) when you first start up the truck is the lifters. When they wear, the oil drains out over time.

Ron
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  #19  
Old November 3rd, 2010, 06:08 PM
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Just a thought, but you might try draining that 0-40 syn oil out and replacing it with a good 20-50 or straight 30 oil. If you change your oil often, there's little sense in spending money on synthetic oil.
See if the lifters quiet down.
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  #20  
Old November 4th, 2010, 08:59 AM
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Small hi-jack: kevkon, who is that in your avatar? It's not Massa or Alonso and I see grooved tires? Kimi? Shummi?
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