After getting down to sorting the oil and water leaks from the M62's valley pan and valve covers I have found two connectors that I just can't think for the life of me what they are for.
I have gone through the circuit diagrams and electrical manuals but it is proving s time consuming job when all I want to do is get back on the road. So with that in mind I thought I would ask.
Please see images attached.
The one from the thermostat heater is accounted for and is if you look carefull just above the stat. But There are 2 more.
One that comes out of the same loom (centre)
The other one comes out of a loom just below the air cleaner box on the off side inner wing.
Your help would be deemed a big favour.

I have a few spares on my M62 2004, do you have secondary air injection unit (SAI)
The one under the air filter could be headlight wiper maybe but the SAI kit is also down there
I'm away so I can't look but your throttle body is connected I take it and you have a connection going to the MAF as well when you fit that

Yep top end connectors all seem to be in the right places.
The wires to the lower inner wing one seems s real heavy duty ( big amp) connector.
I think I will strip out sheath back to get a better ID on colour coding "Brown=feed wire" + Red with lime green horizontal stripe/rings. Eddie the eagle watch out 👀

Hi thanks for taking the trouble to come back to me on this.
Small connector wire colours are Red with white stripe (RW) and Blue with yellow stripe ( UY)
Thermostat has had the 80deg mod done so the thermostat pre-heater connection has been discarded but identified.
The large connector seems to fit the bill for the secondary air pump.
I have never looked for it and wouldn't know if the car had a functioning or even removed one?!
Would the car run ok without one? It seems OK on tick over and overrun etc.. Guess there is only one way to find out on that. am I correct in thinking that it should be located below the air filter intake on the OS inner wing? Eddie the eagle watch out 👀

The SAI kit is under the air filter box as you say and you have pipes running along the front of the engine i believe, i am sure it's only or emissions for when the car is first started to pump in more air while its on 'choke'.
standby i'll try and dig out some phots
Do you have headlight wipers and do they work ?

Have a look at saints 'how to' over on the other side.

https://www.landyzone.co.uk/land-rover/200...ent.213995

Well that would explain it!!!!!
I haven't got one.
The emissions are spot on so one would assume I don't need to worry too much. Eddie the eagle watch out 👀

Nope, i think i'm on my third MOT and as you say emissions are perfect, think it's just for when it's first started to tick some box somewhere no doubt

Think I may have a much bigger problem now.
Just need to do dome deeper investigation. May be nothing but could be the best option to scrap the car. Eddie the eagle watch out 👀

Don't panic, i have been there a few times, engine noise or transmission ?

Worked out and sorted the gearbox just after I bought it. A flush and a new position switch sorted that.
No now I am trying to pick my self up and dust my self off yet again with an engine problem. There are many messengers of doom and gloom, I must admit they are well versed as they all appear to be Range Rover Owners LOL!
OK brave face aside, this is my tale of woe! Bull it pointed for easy reading. " not a typo " 🙊
Valve cover leak detected
PAV bottom vent pipes found to be akin to marsh mellow.
Very slight what sounded like an old distributed cap tracking. You know the distinctive crack.
Knock sensor found to be giving a few problems reading
"Knock sensor LH bank loose connection. Only a slight miss and noise when the engine was under load. Almost like a you would expect a pinking.
So I decided to do a bit of midwifery or was it Aurtherosscopey and seeing if solving the valve cover leak, new plugs, cleaning the coil packs, carefully removing cleaning and refitting the knock sensors which looked good and tight anyway. I thought while I was at it I found a slight weep on the valley pan. So I removed the cross pipes and rear coolant manifold cleaned the rubber gasket which look as good as new and for good measure thought I would re seal it with a fine smear or red Hermatite on both surfaces. Talked everything down as it should be, the. I rechecked it all next day. I fitted new gaskets and seals to inlets and coolant manifold, filled her up and left it overnight. Brill no leaks. New prints on injectors and all put back with great care. Fitted a fully charged battery new plugs even though the old one looked perfectly good one looked as though it had been running lean ish but not bad. Thought it may have been a inlet leak which should now be cured.
Changed the Oil and filter took the fuel pump fuse out and turned the engine over a few times to see if it sounded OK and get a bit of oil in the system before starting. All good!
Put the fuse in and she started first turn. No smoke nice and quite.
Checked her temp and coolant level. No leeks no air trapped. Hay cooking with gas. Now quite late so off to bed a good note and sleep.
Next day took her out a short run. Temp good but hell the knock was still there.
Let a local chap have a listen and a run.
When he came back the the coolant was squirting out from someware below the inlet manifold big style and still had the knock.
He also advised me as did someone else that the first thing I should do is a compression test on all 8.
Knowing the iplications of such advice I decided to get in my wife's Toyota Prius and go and fetch my Son from Wales. "320" round trip. Thought that I may have cooled down by then, and it may have reinforced, why the bloody hell we like the Range Rover So much???? Eddie the eagle watch out 👀

Last edited by Pepi on 19th Mar 2016 10:06pm. Edited 1 time in total

Well it sounds to me like you are fully infected with the range rover disease and unfortunately there is no cure so i am afraid you are in the for the duration.
So where is the knock coming from, can you tell, is it just when warm like the usual vanos knock, usually complimented by the start up rattle ?
Did you have a coolant leak before the valley pan gasket change as you could have arsed that, is there a gasket or is it just sealant ?
Do you have any diagnostics?

Valley pan looked as though it had been weeping but difficult to assess because of oil and dirt build up.
The pan had and has a preformed rubber type seal. Which I thought looked in good condition when I cleaned it and inspect it. When I put it back I took the belt and braces approach and smeared a thin even coat of Red Hermatite on both surfaces.
Put it down lightly and evenly and left it overnight. I re torqued he studs next day just to be sure.
After mulling it over I was thinking of going down the lines of
pulling the fuel pump fuse.
Pulling the coil packs sticking the old plugs into the coil packs leaving the new plugs still in the block.
Earthing the plugs in turn and getting someone to crank the engine to establish the spark was good on each one in turn.
Putting the coil pack back on if they were all good and start looking for an injector fault next.
If they are OK then running the compression test.
If they are all fairly even setting fire to the darn thing!
Only joking. I was hoping to find a fault in the coils or injectors but hopefully not the bores.
I have read something about collapsed cats causing a not too dissimilar problem on the M62 engine.
They were saying to removie an ox. sensor from each side in turn and seeing if the pinking noise stopped to establish if the cat had collapsed and was blocking the exhaust gasses.
Never heard of it before but open to ideas that don't cost to much to try.
Sorry I didn't answer the question about noise.
It rounded to me yo be coming on only under load and now just detectable under idle. Tick over is a bit on the slow side but I Didn't know if that was the ecu settling down after the Full reset. As the battery had been off.
No I have no saved test data as the initial knock sensor diag. was done as a favour. On Test book 4.
Sorry about typos "productive"text. Big fingers on small phone. Dyslexia . And second glass of malt. Eddie the eagle watch out 👀

Malt sounds good, more of a guinness man myself, if i have learned one thing about the car, its good diagnostics.
I have had an allcomms since i first bought mine a couple of years back and I also picked up a faultmate extreme which is good but the Gap tool sounds good also.
Mine is quiet when cold and then develops a knock when warm which i hope is the vanos. i have heard of the cat causing a noise also.
If you didn't have a leak before you started out then could be valley pan or one of your pipes and hopefully not head gasket.
If your plugs all look ok then i wouldn't bother with testing for sparks.
What symptoms do you have other than the knock ?

Insomnia worrying about the bloody car. Eddie the eagle watch out 👀