4.6l in a 350i?

[DarkMatter]

If a 350i has been fitted with a 4.6l upgraded engine are there any external features to the engine that would help me identify it as a 4.6 rather than the standard 3.5?

Also, does a 350i have an LSD as standard, and which make it it?

Thanks.

[Wedg1e]

If it's a factory 4.6 then it probably carries the Landrover engine code, see Rimmer Brothers website for a list (it'll start something like 47A). If it's been bored out from a smaller capacity (unusual) then you'd need to see bore and stroke dimensions (as in, physically measure them,not take someone's word for it )

LSD wasn't standard and is rarely found on 350is.

[adam quantrill]

This question comes up from time to time - yes definitely start from the engine number. And I have heard of people having LSD on a 350i so it isn't cut and dried.

However I wonder if we can do it with an experiment? How about a pipe into the spark plug hole, sealed well, and seeding into a pipe filled with water.

Give it a revolution and the air should be pumped into the pipe corresponding to the volume of the cylinder. Then you measure pipe diameter and the height of the air. Multiply by 4 per revolution.

Assuming the valves are sealing well this should give a reasonable estimate - I think you should be able to tell the difference between 3.5 or 4 or 4.6.....

[simonwedge]

I though LSD was standard on 350i's from S2 onwards? Mine certainly had one.

[superwedge]

jack the car up.if both the back wheels turn the same way,you got a sipper;s

[KKson]

Mines a standard 88 350i and has the LSD

[GOG440]

KKson said:

Mines a standard 88 350i and has the LSD

Mine is an 88 and has an LSD too but I dont know how standard mine is.

[Rockettvr]

Mines 87 and has LSD
If it's an 4.6 shouldn't it have the later GEMS engine management and serpentine belts ? Should be a clue ?

Edited by Rockettvr on Monday 19th May 09:46

Edited by Rockettvr on Monday 19th May 09:48

[DIB350]

I think all S2's had a slipper....mine has. There is a metal tab on one of the bolts on the diff that should tell you if you can read it through the grime!

[smash]

Rockettvr said:

If it's an 4.6 shouldn't it have the later GEMS engine management and serpentine belts ? Should be a clue ?
[footnote]

^ This. Unless it was a short engine or something,

[adam quantrill]

Good point - isn't it cross-bolted at the bottom (possibly with a cradle) in which case you can stick an endoscope up the sump plug and take a look at its bottom end?

[gsx600]

No one's mentioned the drive it like you stole it theory

If reaches 60 in under 5 seconds,and thunders on past 150 mph probably a 4.6 if slower replace with a larger one

[wooly350i]

Howdy Paulo, that'll be mine you described matey, you been sleeping a long time.

[DarkMatter]

Thanks for the suggestions, I'll check the engine number first.