Race Engine Forum UK

Hello,

While searching the internet for a crankshaft from a Lancia Delta Integrale 2.0 16v I ran into information (in one of the forums) that the crankshafts from integrale 8v and 16v engines are identical.

Can somebody confirm if the above said is true?

Thanks and best regards,

Ernest

Ernest hi,

Integrale 8V and 16v cranks - yes they are exactly the same. Also - if it helps - same as Tipo 2 liter 16v and Fiat Coupe turbo and n/a 16v.

As I have indicated below - if the crank you want to buy doesn't look like the one in the photo there is just a chance it is not OE fcatory approved stock. In that case you might be better off with a good used genuine one, this will be discolored black/grey green (and oily) as it comes out of the engine but will clean up to pale grey after decarbonising.

I'm sorry if this sounds a bit of a muddle, but I have been told that 'the heat treatment method' has been changed recently and the factory cranks sold as spares are 'now' not grey colored but just plain steel in appearance - I will remain rather circumspect about that until I have OE factory manual data to prove/disprove either way.

As it says in GC V/W - don't assume you can regrind these cranks. You must never grind a nitrocarburised crank, the nitrided layer is way too thin. If the new method is induction hardening and if it's thick enough - regrinding might be a possibility. We'll see. I'm afraid the whole Integrale spare parts/race parts thing has become rather, er messy, in recent years, with many sources in UK and overseas for what I what rahter arguably call 'cheap bits'..


GC

Guy,

Thank you very much for the lightning fast reply! This information is of great help to me!

All the best,

Ernest

Guy, once you mentioned that after grinding one could renitride the crank and do some other treatments, but the cost of that would be grater than the cost of a good used crank. Could you describe in more detail how should the crank be treated after regrinding to acheive original hardness?
I would like to lighten my integrale crank, and I suppose it will twist or bend slightly so a regrind would be neccesary. Even if not, after lightening, the hard nitrided "shell" would be discontinued, which I asume will make some stress points (reveiling the inner, softer material).

I planned to lighten the crank, do a thermal treatment (I don't know the english word) to "relax" the stresses, then regrind the crank, balance, and finnaly nitride. Would this be ok, or it's more complicaaed that that?

Thanks,
Uros