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JUKE179r's Avatar
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I seriously thought about rebuilding my Disco 2 120A alternator for my 4.0 Thor. My original 19 year old alternator was dying a slow death. The bearing had a grinding noise like it had sand in it and the voltage output was a constant 12.9 VDC.
I decided to bin it and purchase a remanufactured Bosch 150A alt for P38 for 90 quid off of eBay with a year warranty and it fit perfectly. I made an additional 0AWG cable and installed it to the alt frame going to the negative side of the battery for better grounding.
Now I'm getting 13.97-14.06VDC!

I clean my Disco 2 Thor engine's IAC valve by...
removing it from the top of the engine,
spray each opening liberally with brake cleaner (be careful of blow back from the spray into your face),
scrub the inner area with an old tooth brush,
keep spraying the openings to clean it out
and when you gently shake it you will hear the rattling of the stepper motor when it's all loosened up.

Since you are wanting to clean the IACV you might as well clean the throttle plate and MAF sensor.

Did you try testing out the Nanocom from your computer with a USB cable? I think you have to keep the SD card in to do this.
you mention you need to complete the update 3-4 times for it to work. Have you tried another USB cable? The cable you are using could be FUBAR.

This isn't a download but more of a website back up of that has interesting P38 information... Range Rover 4.0/4.6 Problems and Fixes
Here is Mr. Brabyn's actual website... The Enthusiast's Range Rovers Site by John Brabyn

Welcome to the forum Luke.
Do you have an LPG system installed?
Is it still popping when the engine is running?

Where did you buy it from?

Britool FTW! lol
I have a 1/2" drive 300Nm Tekton torque wrench but needed a bigger one for my Disco 2 hubs. I bought a 3/4" drive 560Nm Britool HVT5000 off of eBay for 104 quid. I still need to take it to Norwich to get calibrated.

I used LRDirect when I lived in the states. Fast service via DHL.

dhallworth wrote:

I’ve given up with LR parts suppliers now and go direct to Duckworths Land Rover in Market Rasen. They sponsor the L322 forum and offer discounts to members and free shipping on parts.

Good to know!

Gilbertd wrote:

Maybe because yours is NAS spec but what's the pipe stuck in the red bit next to the PCV? On a UK car that is normally blanked off or is that part of the mod?

That vacuum line is for the brake servo as someone else mentioned.
There is also the 3rd mini vacuum line is for Secondary Air Injection (SAI) system for emission control on the Bosch engine. From what I've read, LR installed it on P38s and Disco 2s that were sold in California and I think in Japan.

Be lucky that SAI is not on Land Rovers over here in the UK. It is a PAIN to troubleshoot with the extra vacuum tubing, and extra electrics.

BrianH wrote:

Mine has it, I know that from losing the red clip previously and having issues locating a replacement as its not on the parts list.

Look up Saab nipple bushing 9mm ID #55557389 or #9179318. I had to replace mine a month ago. The Saab part is way cheaper than LR and it has the same dimensions. I punched it out from inside of the manifold with a 3/8” drive long extension and a 3/8” to 1/4” adapter at the tip.

Reviving an old post for some upgrades for my 4.0L Thor.
Just throwing it out there since I've done the PCV mod and I'm going to install the Bosch -787 injectors...

  • Injectors:
    Bosch injectors for a Thor

  • Oil separator PCV replacement:
    Metal PCV; Fram part #FV308, #V288, NAPA #CRB29380, Sankei #KP111, Purolator #PV1027, or Beck Arnley #045-0264
    Totally remove black plastic oil separator in RH valve cover and remove black plastic barb valve in intake manifold. Replace with metal PCV.
    enter image description here

  • High Performance 40KV Coil Pack (stock coil packs are 20KV):
    Davis Unified Ignition (DUI) Sultans Of Spark (SOS) part #55850, #DUI-55850, or #314-55850

Welcome to the forum!

Thanks all for the welcome!

@romanrob … I bought a bottle of LA’s Totally Awesome cleaner online. I poured it into the covers, let it sit for 20 minutes then scrubbed it out with a stiff bristle brush. I could have used oven cleaner but I don't want to mess up the aluminum.

As for the uploaded pictures… do you mean like this? :-)
enter image description here

enter image description here
I used the "Image" button above the reply box and added the website address for my stored picture.

I'm located nearer to Lakenheath.

Cheers Gilbert! It's good to know I am not the only Disco owner on here.
I recently cleaned out my valve covers to add new Fel-Pro VS50789R gaskets.
before

after

I'm Mike and I don't have an RR but a 2001 Disco 2 V8.
I joined the forum to share and gain knowledge from other V8 owners.

I hope all are doing well during these crazy times. Ta!

-Mike