Disco 2 V8 engine noise

Hi all,

Curious if anyone has any input on this noise and whether it’s anything with which to be concerned. it’s an 01 V8 model with 170k

Boston4 said:

Hi all,

Curious if anyone has any input on this noise and whether it’s anything with which to be concerned. it’s an 01 V8 model with 170k

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Iffy fuel injector or camshaft or a slipping cylinder liner, all will be of concern loads of video’s on utube showing a similar sound.
Just to add that a ticking injector is easy to find, camshaft maybe silent on a cold start-up but starts ticking seconds later, never had a slipped liner issue, it’s not a problem unless your engine has seriously over heated, it’s a course and effect of a badly maintained cooling system.

Not sure about overheats. The truck runs <200F all the time. I don’t think it’s a slipped liner though, I’ve heard that and it’s quite a bit louder and more of a consistent tapping noise. Also, if I recall, the slipped liner usually occurs cold, but this sound is most apparent hot.

I’ll run a fuel system cleaner through the tank and I’ll do an induction cleaning and see if that quiets it down.

Tappet, or "lifter" or whatever you call them in Merka?

I'd not expect injector noise to be that loud underneath. My old engine was the same, never got to the bottom of it. It had new cam and lifters too

kermit_rr said:

I'd not expect injector noise to be that loud underneath. My old engine was the same, never got to the bottom of it. It had new cam and lifters too

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What eventually killed it?

Aside from the noise, my truck is running pretty well.

Boston4 said:

What eventually killed it?

Aside from the noise, my truck is running pretty well.

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It was already dead. When it got over 80c, it started dumping exhaust gases into the coolant which i could only put down to block or liner problems. I'd had the heads off and didn't see liner movement though, equally no obvious steam cleaning.
Ran it for a while with a duff thermostat which kept it below 70c.

Is the noise there when the engine is cold?

could be as simple as a stuck NRV in one or more of the tappets, you have to remember that tappets can be very loud if there are more than 1 at fault..

Liners are more of a "clack clack" noise and is only audible when hot...

Also slipped liners WILL cause the cooling system to over pressurise and she will drop her guts often

Stanleysteamer said:

Tappet, or "lifter" or whatever you call them in Merka?

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Yes I'd agree

Boston4 said:

Hi all,

Curious if anyone has any input on this noise and whether it’s anything with which to be concerned. it’s an 01 V8 model with 170k

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Hmmm I would say lifter but id Be putting my money on camshaft wear.
Specially if she’s in 170k and hasn’t been run on 20w/50 with a high ZDDP content. Maybe time for a rebuild

Megamagelol1 said:

Hmmm I would say lifter but id Be putting my money on camshaft wear.
Specially if she’s in 170k and hasn’t been run on 20w/50 with a high ZDDP content. Maybe time for a rebuild

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I have heard camshafts go on these for a pastime.

Stanleysteamer said:

I have heard camshafts go on these for a pastime.

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After 150k and there still on original camshaft and haven’t been run with 20w50 with a high ZDDP level, you can expect to be replacing them.
They start to discolour, pit and get flat spots

Bantam1 said:

Yes I'd agree

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Boston4 said:

Hi all,

Curious if anyone has any input on this noise and whether it’s anything with which to be concerned. it’s an 01 V8 model with 170k

Click to expand...

Id say 95% not slipped liner

There is absolutely nothing like regular oil changes at about twice the recommended frequency.
That said, if it is a lifter, there are products supposedly to be stuck in with the oil that can clear a blocked lifter. I'd rather find the bug ger and clear it myself.

Stanleysteamer said:

There is absolutely nothing like regular oil changes at about twice the recommended frequency.
That said, if it is a lifter, there are products supposedly to be stuck in with the oil that can clear a blocked lifter. I'd rather find the bug ger and clear it myself.

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Yes your correct some oil additives clean the oil holes in the tappets, however a high ZDDP level in the oil creates a coating when under pressure and heat around the lobes of the cam and the bottom of the lifter, this is on these type of engines the main point of wear.

Stanleysteamer said:

There is absolutely nothing like regular oil changes at about twice the recommended frequency.
That said, if it is a lifter, there are products supposedly to be stuck in with the oil that can clear a blocked lifter. I'd rather find the bug ger and clear it myself.

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Well my 3.5 RR which was serviced twice a year by the main dealer I purchased it from, so when at 1100k miles and 10 years it had the cam plus associated parts replaced, £1200 back then but it was a selling point when it was sold a year later.
And I though it would last fo ever as it was my most expensive vehicle at the time in 1997

discool said:

Well my 3.5 RR which was serviced twice a year by the main dealer I purchased it from, so when at 1100k miles and 10 years it had the cam plus associated parts replaced, £1200 back then but it was a selling point when it was sold a year later.
And I though it would last fo ever as it was my most expensive vehicle at the time in 1997

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1100k miles?! To the moon and back twice?! Pljus?! On one cam?! Jesus! should be in the Guinness book of records!.If it did all those miles it proves the theory about doubling up on oil changes though!

Stanleysteamer said:

1100k miles?! To the moon and back twice?! Pljus?! On one cam?! Jesus! should be in the Guinness book of records!.If it did all those miles it proves the theory about doubling up on oil changes though!

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Typo! 10110 miles + or - It was used 24/7 by the family in alL weathers , the only other replacement was the battery.

discool said:

Typo! 10110 miles + or -

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So you had to change the cam after only just over 10 thousand miles? That really sucks! Wasn't it still under warranty?
Feel for you on that mate!

Mine is on 126k i pulled the Valley gasket at 120 and the cam was still in good nick..

It is all about maintenance, and the correct oil 20w50 with ZDDP or a Race spec fully synthetic, i run 10w60 in mine..

purrs like a kitten..

Those additives will do little good as the sludge and crap sits in the tappet and the only way to clear them is to disassemble, and by that point you might aswell overhaul the top end..