Rover V8 Serpentine Belt

Rover V8 Serpentine Belt
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Serpentine Belt

The standard 4.6 Litre Rover V8 has a really long Serpentine belt. It drives a lot of equipment I don’t need such as air conditioning and power steering. Mine was fitted with a 7PK2320 belt. That’s a 7 ridge flat belt, 2320mm long. With all the ancillaries fitted, the engine simply didn’t come close to fitting in the engine bay.

Rover V8 Pulleys

Without the unwanted ancillaries and a different belt route, the engine fitted snugly. The alternator sat on its factory bracket, but the complete near-side assembly was binned.

I worked out a new belt route that was roughly 1570mm long. I needed a shorter Rover V8 serpentine belt, so I bought a 7PK1570 serpentine belt from a Land Rover Defender 110, 2.5litre. 7PK belts are available in dozens of lengths and are fitted to all sorts of vehicle. The choice of lengths is incredible. You can buy a decent brand belt from your local car shop for less than £10.

Rover V8 Serpentine Belt Tensioner

I moved the belt tensioner from the driver’s side to the passenger side and made a new plate for it to sit on. The total thickness for the plate and spacers was 19.4mm.

Rover V8 Serpentine Pulley Bracket

Flywheel

When I swapped to the 4.6 Rover I moved the engine and box 10mm forward. The reason for this was for gearbox clearance issues. I may also need to add a gearbox spacer. The 4.0 flywheel is much thicker than the older SD1 item. I was using a slightly lightened Rover SD1 manual flywheel, but for the 4.6, I had to change to a super heavy 1998 P38 4.0 Range Rover manual item. The reason for this is the trigger wheel for the hall effect crank sensor. I plan on asking a local engineering company to machine a groove into the back of my SD1 flywheel to take a P38 trigger wheel. – Hopefully they’ll say ‘no problem’, and I can still use my lightened one. The P38 item has to weigh nearly twice the SD1 item.

I found this post: P38 Gems Manual Flywheel
rover-v8-manual-trigger-wheel

Timing Cover

The 4.6 doesn’t have a distributor, making the front timing cover shorter. Therefore, I thought I wouldn’t have any issues. However, the rocker boxes were now a little too close to the shock mounts and the oil filter fouled the chassis. Luckily, I had a remote oil filter kit that came in a box of random classic car bits (It fitted!). I will be moving the shock mounts, but that’s another story.

remote-oil-filter-rover-v8

Rover V8 Front Covers

The 4.6 P38 GEMS cover (left) is the shortest but the oil filter sticks out sideways making it wider than the 3.9Litre cross-over cover (with distributor drive). The right cover is a Rover SD1.

The current plan is connect up all the pipe work and wiring for the engine whilst I make a couple mods to my MS1 Megasquirt. I did consider using a standard engine management ERR6645 computer with the immobiliser disabled. You can buy them on ebay for £60. But seeing as I had a MS1 Megasquirt, I thought, ‘might as well….’

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