1602 engine to a 2002 engine what do I need?

[Hansome]

I have an ageing 1602 engine and wanted to step it up to a 2.0 - can I use my current block and crank or does the crank need to be swapped too? I wondered if there was also a good source for building these engines eg a reference book or similar. I have rebuilt several engines (air-cooled VW and SBC's) so that's not the issues just gaining the knowledge of what's require is 

thanks

H

[Mark92131]

Find a used 2.0 L M10 motor, rebuilt it, swap it in.  That way you can drive your car until you are ready to install the new motor.  Lots of reference books (Blue Book) and the FAQ to help you get this done.

 

Mark92131

[tech71]

The 1602 M10 block has an 84mm bore, The 2002 block has an 89mm bore.

Kind of doubt you could bore your block out 5mm?

Not sure what the rod throw is on a 1.6L crank.

Procuring a 2L M10 might be easier.

 

[Hansome]

Hi - 

What I should have added is I'm in the UK and the car is in Portugal (finding anything engine wise is difficult and because its old its seen a vintage and parts carry a higher cost) so I'm building in the UK and shipping over to fit, but changing anything from original on a car is either not allowed (hence very limited customising scene) unlike UK, USA etc or there is a financial penalty which not being native I don't know or could possibly understand how to find that info.

Hence wanting to use the same block because numbers would match with documents for the yearly inspection ?

I agree finding a 2L might be easier  - if not for the above 

Tech71 boring the block is probably a no go - so it seems I need a 2L block to start me off.

Not many engines come up for sale in the UK I don't know why? just have to keep looking

 

thanks H

[John_in_VA]

Hopefully you're aware of the UK 2002 forum - they'll take good care of you!  http://www.02forum.co.uk/

[Hansome]

Hi John, 

Yes I do sir!! I’ve been on that forum years before I brought the car ??

2002FAQ is just a bit more going on …

??

[tech71]

2 hours ago, Hansome said:

Hence wanting to use the same block because numbers would match with documents for the yearly inspection ?

 

2 hours ago, Hansome said:

seems I need a 2L block to start me off.

Your contradicting yourself here, any 2L block you find will  most likely be marked with a VIN and won’t march your cars

Portugal, Uk, sounds convoluted. 
You could squeeze some extra power out of your original 1.6L engine and keep whatever version of TUV you have to deal with off your case

[Mike Self]

You couldn't achieve a full two liters displacement, but if you wanted to overbore your 1600 block say 2mm (there should be enough meat in the block to do so, but to go over a 1mm overbore would require custom pistons) and then use a 2 liter crank, you'd end up with a displacement somewhere between the original 1600 and two liters.  The factory created the 1802 by doing just the opposite:  2 liter (89mm) pistons and the 1600 (71mm) crank.  Just a thought.  BMW managed to squeeze 2.5 liters out of a 2 liter S14 by using a longer throw crank and it worked.  

 

mike

[Tommy]

42 minutes ago, Mike Self said:

 ..The factory created the 1802 by doing just the opposite:  2 liter (89mm) pistons and the 1600 (71mm) crank.  Just a thought.  BMW managed to squeeze 2.5 liters out of a 2 liter S14 by using a longer throw crank and it worked.  

 

mike

Original factory recipe for 1,8l m10  was 80mm crank with 84mm pistons in 1800 NeueKlasse. That would be achievable with the original block.

[uai]

4 hours ago, Tommy said:

Original factory recipe for 1,8l m10  was 80mm crank with 84mm pistons in 1800 NeueKlasse. That would be achievable with the original block.

Although I'd suggest going the 2 Liter Engine route I can confirm that this is feasible. 
I did that on my convertible where I wanted to keep the engine#
2 Liter Crank 1800 Neue Klasse Longstroke Pistons and a couple of other additions added up to invisible 108 hp.

Edited September 6, 2022 by uai

[Hansome]

14 hours ago, tech71 said:

 

Your contradicting yourself here, any 2L block you find will  most likely be marked with a VIN and won’t march your cars

Portugal, Uk, sounds convoluted. 
You could squeeze some extra power out of your original 1.6L engine and keep whatever version of TUV you have to deal with off your case

I have indeed ...... I guess I'm trying to work the best option and when I reference the 2l block it would mean here in the UK - build up and take to Portugal - do the swap and then do the work on the 1600 matching numbers - so I have a usable vehicle when I'm there. 

food for thought methinks

 

?

[Henning]

I let my 1602 block bore to 89mm years ago. Added 2002 crank, pistons and head. Has way more than 80k miles now.

 

henn

 

[Preyupy]

The racers back in the middle '60's used the long stroke 1800 (1600 bore and 2liter stroke) engines bored to 89mm to run in the Under 2 liter class in sports cars.  It can be done but I recommend you have the block sonic checked to make sure the cylinder walls are thick enough to get away with it. 

 

What is the inspection process for your cars that the engine serial number is checked to match the actual car?  Is it OK to swap a different engine (from the same year and model)?  How knowledgeable are they about the cars?  Are they just looking at the VIN on the block or would they also look a the date stamps cast into the block?  Would they know the difference between a 118 head (1600/1800) and a 121/E12/E21 head from a 2 liter or even a later 1.8 head?