RoverTide
Full Access Member
I can't imagine it went 40k without an oil change. I would assume there was at least one in that time period that wasn't reported to carfax. Certainly, none of the DIY work on my cars will be reported to carfax.
New engine noise
- Thread starter powershift
- Start date
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powershift
Full Access Member
I called the Land Rover dealer it was serviced at in CA to get history on the air suspension and there was a lot of service data to sort through. The service guy looked and started to end the call saying he didn't see anything in the records just regular maintenance and I would thank him and then he would keep going. For probably 10-15 minutes he kept at it until he came upon a 2019 log entry. Its highly unlikely it went that long w/out a oil change because whoever owned it before me was meticulous. That LR4 was so clean when I bought it last July it looked new. No dust between the seats on the floor, door jambs were spotless, etc.
Jimmy Brooks
Full Access Member
Probably did the maintenance himself to save money, or took it to another shop. You’d have serious sludge buildup and would’ve probably went through a chain or engine if it was actually ran for 40k on the same oil.
I just ran a carfax on my own vehicle to see what it says before I put it up for sale. There are things I had done at a mechanic or the dealer that do not register on the carfax report. For example, about 3 years ago I had a local indy replace both my crossover pipes, the water pump, thermostat, and all those little coolant fittings around there. I supplied those parts. The indy also found that my lower radiator hose needed replacement. The indy supplied that part. The only thing the carfax notes is that lower radiator hose.
Jimmy Brooks
Full Access Member
Ok, going back to this post thread
Over the past couple weeks that I’ve been home and actively using my LR4 and I’ve been paying attention to the noise because I saw the words “rod knock” and second guessed myself.
Here’s what I know and what I’ve concluded: I know it’s been happening since 2022 because I have a video of the noise from then. I also know that there isn’t piston damage as I scoped all the cylinders in 2023 when trying to figure out why the truck wouldn’t start. I also did an oil change and I know that there is no metal in the filter. I’ve also driven the car over 13k miles since the video and I baby it but will have a heavy foot when I need to after the engine has warmed up so I’m pretty damn confident that it isn’t rod knock. Chain is also tight through the oil cap (the side the noise is on.)
So now I’m thinking valve train or exhaust leak. The noise comes and goes and I can’t hear it unless the engine is really sitting at <800 rpm. Seems to go away when the car is hot but comes back when I turn it off and start it again. I know that the noise is coming from the top of the engine. I know that one of the header bolts probably sheered because I found a nut that sits in between the exhaust manifold and the heat shield for the manifold. And I also know that these cars engines are known for sheering those bolts. So my question is, what do you guys think
Over the past couple weeks that I’ve been home and actively using my LR4 and I’ve been paying attention to the noise because I saw the words “rod knock” and second guessed myself.
Here’s what I know and what I’ve concluded: I know it’s been happening since 2022 because I have a video of the noise from then. I also know that there isn’t piston damage as I scoped all the cylinders in 2023 when trying to figure out why the truck wouldn’t start. I also did an oil change and I know that there is no metal in the filter. I’ve also driven the car over 13k miles since the video and I baby it but will have a heavy foot when I need to after the engine has warmed up so I’m pretty damn confident that it isn’t rod knock. Chain is also tight through the oil cap (the side the noise is on.)
So now I’m thinking valve train or exhaust leak. The noise comes and goes and I can’t hear it unless the engine is really sitting at <800 rpm. Seems to go away when the car is hot but comes back when I turn it off and start it again. I know that the noise is coming from the top of the engine. I know that one of the header bolts probably sheered because I found a nut that sits in between the exhaust manifold and the heat shield for the manifold. And I also know that these cars engines are known for sheering those bolts. So my question is, what do you guys think
powershift
Full Access Member
There is a genuine rod knock video on /r/landrover that is pretty scary. It might be worn rod bearings https://www.dropbox.com/scl/fi/40s8...27_1.mp4?rlkey=0hh4q7qzqyb55k1ao3z68wcys&dl=0
I think the noise is in the valve train too. An exhaust leak at that point will have a higher pitch noise and sound like a tick.
Looking through the manual on a 2011, the Switchable Tapplets would be on the suspect list. I'm not sure what else could make that noise outside of low oil pressure or oil blockage. The tappets sit on top of the valve spring and underneath the cam. The tappet controls what cam profile is being used. If its fed oil then it rides on a different cam lobe. Pretty clever. At high RPMs it uses physically different cam lobes than lower RPM's.
A broken valve spring would be consistent. One thing to check is the oil pressure to see if there is a change in pressure when the noise is there vs when it isn't. I don't have the equipment to do that though.
I think the noise is in the valve train too. An exhaust leak at that point will have a higher pitch noise and sound like a tick.
Looking through the manual on a 2011, the Switchable Tapplets would be on the suspect list. I'm not sure what else could make that noise outside of low oil pressure or oil blockage. The tappets sit on top of the valve spring and underneath the cam. The tappet controls what cam profile is being used. If its fed oil then it rides on a different cam lobe. Pretty clever. At high RPMs it uses physically different cam lobes than lower RPM's.
A broken valve spring would be consistent. One thing to check is the oil pressure to see if there is a change in pressure when the noise is there vs when it isn't. I don't have the equipment to do that though.
Jimmy Brooks
Full Access Member
ok so I read your response and I did some digging and came across this video.
In this video the sound is pretty similar, I would say a little more prevalent than both of ours, however, in the comments, he comes back three years after making that video and claims that it was the timing chains, and when he got the chains done, the noise went away. I know that you have had your timing chains done so maybe it would be a good idea to ask the person who did them to take a second look? Should still be under warranty right? Just a thought but I would find it odd because my chain is pretty tight and the noise is coming from the driver side where I can pull the chain from the oil cap.
In this video the sound is pretty similar, I would say a little more prevalent than both of ours, however, in the comments, he comes back three years after making that video and claims that it was the timing chains, and when he got the chains done, the noise went away. I know that you have had your timing chains done so maybe it would be a good idea to ask the person who did them to take a second look? Should still be under warranty right? Just a thought but I would find it odd because my chain is pretty tight and the noise is coming from the driver side where I can pull the chain from the oil cap.
powershift
Full Access Member
His video does sound like chain slap, so maybe ours is slapping too. I tried moving my chain before and after the chain work and before I could push the chain and move it but not afterwards. My sound is on the driver's side mid engine area. If I could reproduce the problem then I would take it into the shop and get their opinion.
Jimmy Brooks
Full Access Member
Ok just let me know. I would be doing the same but I haven’t done the chains so it’s more likely that a shop will just tell me it is to get money out of me. With your warranty it entitles them to fix it if someone had a similar noise and claimed it was the timing chain which you’ve just had done.
On another note I will be doing upper timing cover gaskets and valve cover gaskets so I should be able to check on the tension of my chain and see if the guides are still intact. I’ll also try to see around the camshafts and see if I can see any wear on the tapplets.
powershift
Full Access Member
I heard the noise after startup on a hot engine today. I popped the hood to try to isolate the noise, grabbed a fender cover so I wouldn't burn myself on the metal and the sound went away.
It was hard to narrow down the source but I'll keep trying to find a pattern on when it starts to happen and where its coming from. It might be the chain because the noise did sound in front too, maybe the tensioner is failing somehow and allowing light slap and then it recovers. I need to spend more time with it. Right now I'd need to pay for lodging if I took it into a mechanic so I want to be able to reproduce it easily and on demand so they can replicate it on their own.
It was hard to narrow down the source but I'll keep trying to find a pattern on when it starts to happen and where its coming from. It might be the chain because the noise did sound in front too, maybe the tensioner is failing somehow and allowing light slap and then it recovers. I need to spend more time with it. Right now I'd need to pay for lodging if I took it into a mechanic so I want to be able to reproduce it easily and on demand so they can replicate it on their own.
