I am dealing with a weird TDV8 ticking/tapping rhytmic noise on idle that appears with warm engine and it goes faster as I increase engine speed, above 1400-1500rpm it is not noticable. With cold engine there is no noise and it slowly starts to go louder as the engine warms up.
The short block itself is new with new chains, tensioners, guides, driven only 6000km. This ticking noise has been there for around 4000km and nobody has a clue what is causing it.It is more hearable from underneath the car and listening with stethoscope it is coming somewhere around the oil pump/oil sump area in the front of the engine. The noise resonates around so hard to point out the exact location where it is coming from.
Right now I am guessing defective oil pump, chain guide or bad tensioner. Oil pump was also new, this came with the new short block. I have done 3 oil changes during the 6000km with new engine, first 50km, second 3000km, third 6000km, oil and oil filter is clean without any debri. Right now using Motul 5w30 8100 Eco-clean+ C1. Does anybody have any idea what is causing it? Something I can check? I ordered new chain tensioners and try to replace them as it's the easiest of them all. Maybe something auxilliary component related?

I will attach video link for the sound, maybe somebody has had similar problem with

https://youtube.com/shorts/WqY1tOTU9Xw?si=mvZefiL35odVdbcS

Here is second video with increasing the engien speed

https://youtube.com/shorts/5PLzbnwJchg?si=Z5xBe2oFKK2DMqhJ

I rebuilt my SDV8 last year after a spun big end bearing, that sounds like it could be chain slap due to either a bad oil pump or tensioner, although you would not expect it if a new short block, chains and tensioners have been installed. Were they genuine JLR items?

I note you say the oil pump came with the new short block, I bought a genuine short block (ordered December 23 & delivered November 24, (now a temporary coffee table) part No. LR035361 and it did not come with the oil pump?

Also the hydraulic chain tensioners were upgraded at some point as the new one's I bought for my rebuild were noticeably different to the original items.

There's a lisrt of all part numbers I used in my thread here if of any use: -

https://www.fullfatrr.com/forum/topic68615-15.html L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

I was thinking the same, that maybe the oil pump didn't come with the engine block. Mechanic told me it did come and searching from google the engine block code (same as yours LR035361 - ordered 08.2023 delivered 07.2024) there are some with oil pump included some are not.
Maybe I'll give it a try and replace the oil pump as it seems it's not very hard to get to.

Was it a new shortblock from JLR, as my understanding was none were in production until late November 2024 as I documented in my other post. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

Here is the invoice from dealership. Can't really remember when it was delivered, maybe it was 10.2024

Click image to enlarge

No mention of an oil pump and also no head gaskets, not sure how you would replace a block with using head gaskets? That was a very good price for a genuine shortblock, I paid just under £5k with discount in December 24 and see they are now just under £10k.

I think I'd change the hydraulic chain tensioners first as they aren't listed on your invoice and are a pretty easy change, definitely worth a go before going the oil pump route. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

The head gaskets were ordered separately and also the chain, tensioners and chain guides. I already ordered new OE chain tensioners, the passenger side tensioner arrived already and we replaced it - no luck, noise the same. Now in few days should arrive the driver´s side tensioner. I will give this a try.

Do you know if we have to remove oil sump in order to replace the oil pump? Can´t really find clear answer from forums. And if it mandatory to remove oil sump maybe it is good idea to peak under the chain cover to look for any defecets on the chain guides?

My concern was if the chain slap noise is oil pump and oil pressure related, will it cause any damage to the rod bearings? Strange is that the noise has been there for around 3000-4000km and there is no metal shavings or particles in the oil or oil filter.

Was any warranty offered by the JLR main dealer on the rebuild as all parts have 24 months warranty?
With regards to the oil pump replacement, yes the sump needs to be removed and to aid removal of the sump the front differential needs to be removed, it's documented in the WSM and oil pump replacement can be found here:-

https://www.fullfatrr.com/gallery/albums/u...LATION.pdf L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

The engine rebuild itself was done by a independant mechanic and racecar engineer, but unfortunately he passed away.

Sorry to hear that. Maybe try the remaining tensioner and then if no change, rig up a oil pressure gauge to see if the pump is within spec before changing it. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

Thanks, I will give an update next week about the other tensioner.
In order to measure the oil pressure with gauge I have to remove the vacum pump to get access to the measuring port?

You can remove the oil pressure switch on the front of the left hand head and connect it there, shouldn't need to remove the vacuum pump.

There is a post somewhere on the forum for just this with a guide to oil pressures acheived at various temperatures and engine revs, that would be useful to compare yours against. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

Thanks, if it´s that simple I will measure the oil pressure meanwhile I am waiting for the other tensioner to arrive.