Thread: Differences between 2.6 Litre engine Series 2A & Series 3?

I think the 6-cyl engine remained the same.
7 bearing crank (5 bearing was the later 4-cyl engine).

Colin

There were minor variations in the engine over time (mainly to meet increasingly restrictive emissions regulations), but I know of no changes that corresponded to the change from Series 2a to 3.

And no major changes of any kind - by the time the Series 3 was in production, the engine was getting distinctly dated (basic design is early 1940s), and its replacement by the V8 was in sight, although any major changes were stymied by Leylands attitude to the Landrover as a cash cow.

John

Yep, the pollution gear and a change to the cam and rockers. Some engines were fitted with roller rockers to overcome the wear experienced in the early engines.

Originally Posted by Lionelgee

Were there any differences between the 2.6 litre motor in a Series 2A and the Series 3? Other than the later Series 3 went up to a 5 bearing motor.

Kind Regards
Lionel

Originally Posted by toad

Yep, the pollution gear and a change to the cam and rockers. Some engines were fitted with roller rockers to overcome the wear experienced in the early engines.

According to the parts books, exhaust rockers are identical for all Series 2a and 3 2.6 engines - and have rollers.

John

Originally Posted by Lionelgee

Hello All,

I just checked off one of my engine numbers against Glencoyne's list of engine numbers. Accessed 8th of August 2014 from Land Rover, Range Rover engine numbers - by Glencoyne 4x4 (Thetford)

The engine number is 3451187 B and Glencoyne suggest that 345xxxxxx engines were fitted to the Series IIA petrol 2625cc.

Were there any differences between the 2.6 litre motor in a Series 2A and the Series 3? Other than the later Series 3 went up to a 5 bearing motor.

Kind Regards
Lionel

Hello All,

I probably should of asked whether there were any changes between the clutch from a Series IIA 2.6 Litre engine and the Series III gearbox?

This link says their Exedy Clutch fits "2.6L Land Rover Series III 109 with 2.6 petrol engine (1972-80)"

Genuine Exedy Clutch KIT Land Rover Series III 2 3L 2 6L 1972 80 | eBay

So would this Exedy Clutch fit happily between the IIA engine and the Series III gearbox? The engine would be going into a Series III that currently has an Holden 202 engine fitted to it.

The engine is fine however the gear box was out of alignment and it jumps out of gear when going down hill. Plus the conversion was never engineer approved and it does not have a Queensland Department of Transport Modification "Blue Plate" courtesy of the previous owners.

I am thinking of taking the 202 out and matching the Series IIA motor to a gearbox out of another my Series 3 Land Rovers. I have actually driven the vehicle with this box and I know it is a good one. I also have a Fairey Overdrive of unknown quality that I might hook up as well.

Has anyone any experience with the Exedy Clutch and are you happy with its performance? If not what other brands of clutch kit are available and that people would recommend?

Finally, Exedy offer a "Heavy Duty" Clutch - would this be a better option than the standard clutch? What advantages would it have for the extra cost?

http://www.ebay.com.au/itm/GENUINE-E...item2343b528bf

Kind Regards
Lionel

Lionel,

4 cyl SII & IIa have a different release bearing & 9" friction plate rather than the 9.5" of the SIII. Not sure about the 6 cyl, you might want to check what you have fitted.

I'll have to check what brand I fitted to my C240 powered SIII, sourced locally cost was about $170 (but that was 'trade price').

The HD clutch has a stronger pressure plate and possibly different friction material, ideal for heavy towing, 'drag racing' etc.

Paddocks can supply AP pressure plate, clutch plate & OEM (??) release bearing for the Series III for about 70GBP. Double that then add freight so unless you were bringing other parts over the Exedy one would be about the same price.


Colin

Clutch release on the 2a six is similar to the 2a four, and hence different to the Series 3 six, and I'm pretty certain the clutch is different as well.

John

Originally Posted by JDNSW

Clutch release on the 2a six is similar to the 2a four, and hence different to the Series 3 six, and I'm pretty certain the clutch is different as well.

John

Hello JDNSW & Gromit,

Does this also mean that the main shaft coming out of the gearbox that engages with the fly wheel is also a different diameter between the Series IIA and the Series III?

Therefore changes would need to be made from the crankshaft in the Series IIA back through the flywheel, clutch, throw-out bearing, pressure plate, bell housing... assembly to be able to graft the IIA engine to the Series III gear box. Is the spacing of the bolt holes in the crankshaft out of a IIA capable of fitting the Series III flywheel?

What I am trying to say what parts must or can be replaced in the IIA engine to be able to hook it up to the Series III gearing system so it can move under its own power?

Otherwise if the Series IIA engine is incompatible with the Series 3 clutch & gear box arrangement, my options seem to be:
1) sourcing Series IIA clutch system & release arrangement, bell house and gearbox. Would this have flow-on effects with drive shafts and differentials between the Series IIA and the Series III?
2) Take the gear box off behind the Holden 202 and get my dial guage and have a go at getting the alignment sorted out so it does not effect my replacement Series 3 gear box.

At least I am spoiled for choice as the 202 is still a very good engine.

Kind Regards
Lionel