I'll have $10 that you have a liner (or maybe more than one) trying to punch its way through the head gasket...

But by all means go and check everything else, provide your oil pressure readings, pull your front cover apart, change the pump rotor that is probably broken (but still making good pressure), and finally give up, pull the heads, and see the grooves in the firing rings from the liners moving...

 

And while at it don't forget to fix all the cooling system issues that may have lead to this fun. One good overheat is all it takes, and running around at 230F is not good for the engine.

 

So I have been beating my head over and over about this stupid loud ticking noise that everyone seems to have. After being told a number of times that it was my sleeve slipping I was about to pull the engine and send it out once I confirmed that sleeve was slipped.

So my noise started at about 64k I purchased the truck with 59k. It did not make the noise for 5k miles. I changed the oil at right around 63.5k and put in Rottela T6 5w40 which I read on here was good to use. 500 miles or there abouts I started to notice the noise.

Now this noise happens just like eveyone else has explained and sound exactly like everyone else at least it apears to be the same listening to videos. It was quiet on start up and would only do it when the engine warmed up and I was at a stop light or a drive throught and the truck idled down, once you started to move the noise went away. The noise aslo seem to be much more rapid that a sleeve moving up and down it was almost twice the speed ( as you can see I said WAS! ) Knock on wood!

Oil was down almost a quart (valve covers need to be tighten a bit) so I decided to try some "snake oil" ( Lucas oil treatment for real ) it says on the bottle stops noises and noisy lifter so I said what the heck. I put it in and took off on a trip that was about a hour and half when I got there and stopped at the stop sign the engine was quiet. I drove back and still quiet, the noise has not come back in the past 700 miles I have been driving it everywhere, towing my trailer and driving both on the highway and in the city.

Don't really know what to say but Ill keep my fingers crossed but I love the truck again.

I will keep everyone posted

Mark

 

You had a plugged lifter.
Someone did not change the oil enough.
I always push Barr's leaks on here and no one ever listens.
Glad the Lucas fixed it!

 

try running rottella 15-40 insteed of the 5w synthetic stuff, you may just need a heaver oil.
I had 10-40 in mine for about 4 hours once the motor sounded like it had marbles bouncing around in the oil pan.

 

As many of us who have experienced true slipped liner syndrome, the noise only starts to "go away" at 2000+ rpm when it is partially drowned out by the noise of the engine, the viscous fan, and that the liner starts "floating" between the upper and lower constraints (block and gasket) because the piston velocity is so high, so doesn't have the significant rapping sound.
By 3000 rpm, you can't hear it any more.


Any noise that goes away completely with a little blip of the throttle or by 1500rpm is completey quiet is most likely not the liner from my, and plenty of others experience.
Mike of course still says liners don't move, and that the issue is always lifters - in your case it was true, but for a 2003/2004 - I'd say you are definately in a minority.

Glad it worked for you though -

 

this is the first time anyone has said anything to me about the 1500rpm and 3000rpm deal everyone kept saying it was a sleeve accept Mike who I spoke with on the phone ( thanks again Mike! )

anyways so far so good and I will keep posting to confirm weather this has freed up a lifter or it's just a freak thing that it's quiet now.

almost 900 miles now

Mark

 

There are a million 'ticking' threads but this looks like the best place to share my process and subsequent success.

I purchased my 2004 Disco a few months ago and it always presented a pretty loud tick once the engine got warm. This ticking was loudest at idle.

Over the last few months, I made a number of changes both to try to get rid of the ticking and for preventative maintenance. Below is what I have done and it's subsequent change to the ticking volume: (in chronological order)

• Changed to Rotella 15w 40 - 5% reduction in ticking
  
• New exhaust manifold gasket - 20% reduction in ticking
  
• New radiator / hoses - PM
• New spark plugs - PM
• Ultragauge to monitor coolant temperature.
• UG Note: Baseline average temperature was 213-217 degrees.
• Changed from current 'white' thermostat with above results to 'low temp' thermostat.
• UG Note: Temperatures are substantially lower. Average temperatures are now ~183 degrees with a high of 190. - 75% reduction in ticking

I suspected getting the engine to operate at a lower temperature would reduce the ticking but I did not expect it to eliminate it completely. All ticking has been eliminated!

i hope this helps others with similar ticking issues.

 

Thanks

 

That is interesting. As I noticed my ticking started as it has gotten warmer out. As the temps outside have increased so have my engine temps. I see a high of 206 but have the new thermostat and a radiator waiting to go in. Might have to give it a go and see if it solves the noise.