Engine Series 3 swap…

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VespaDavidson

New Member

Posts

1

Location

Spain

• May 26, 2022

• #1

Hello, I have a Spanish diesel series 3. 1980. It is on an historic plate which means it has to remain original. Now, some years ago it dropped a valve, this was repaired, but the front cylinder is badly scored. I want to repair this. I was told it is possible to use a block from a 2.5 and change over timing gear.? Is it possible? Simple? Will it give me a little more umph? The cost of a 2.5 block and a new sleeve and work etc are similar… any advice?

 

Bobsticle

De Villes Advocaat

Posts

27,632

Location

Manchester

• May 26, 2022

• #2

A two and a half has very little more to offer than a two and a quarter. Id simply re sleeve the original as they are getting more rare now.

 

LordOWar

Well-Known Member

Posts

460

Location

North West

• May 26, 2022

• #3

The other problem is metric and imperial fittings. The 2.5 will be metric and if your old engine is then great you can swap parts but it gets a bit more hmm if the old engine is imperial threads. Like Bobsticle says keep it original if you can.

 

Turboman

Mab An Gov

Posts

60,151

Location

Lathrowda, Kernow

• May 26, 2022

• #4

VespaDavidson said:

Hello, I have a Spanish diesel series 3. 1980. It is on an historic plate which means it has to remain original. Now, some years ago it dropped a valve, this was repaired, but the front cylinder is badly scored. I want to repair this. I was told it is possible to use a block from a 2.5 and change over timing gear.? Is it possible? Simple? Will it give me a little more umph? The cost of a 2.5 block and a new sleeve and work etc are similar… any advice?

Click to expand...

It is easier to change the engine for the whole 2.5 NA.
They are a bit more powerful, and a bit better, than a 2286 cc diesel.
On the downside, I think 2.5 NA have a plastic belt instead of a timing chain, if the engine comes out of a Land Rover. Taxi engines I think have chains anyway.

Like they say^^^^^, with classic prices rising, it might be better to stay with original engine for the relatively small gains involved.

 

steve2286w

Well-Known Member

Posts

4,505

Location

monkeyangerland

• May 29, 2022

• #5

Rebore?