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DY3 engine block suitable for 2347cc?

Loudel

Member
One for the gurus, as title says.
I have an old DS19 engine block, could I use it to upgrade to 2347 liners?
RegarDS
Lou
 

citroenthusiast

Active member
DS19 is a long stroke motor, which is completely different from the 2347. Long stroke motors have three main bearings. The 2347 is a five-main bearing motor, similar to the DS21 and ID19.
 

DoubleChevron

Real cars have hydraulics
DY3 is a short stroke from the late 60's, early 70's. You shoudl be able to fit a DS23 piston/liner set. I'll leave that to the experts to detail :) (me, I'd like to rebuild one to 2.5 or 2.6 litres using CX parts!).

Its probably not a DS19, rather a DS20, or "DSpecial/Dsuper".
 

aceone95

New member
DY3 is a short stroke from the late 60's, early 70's. You shoudl be able to fit a DS23 piston/liner set. I'll leave that to the experts to detail :) (me, I'd like to rebuild one to 2.5 or 2.6 litres using CX parts!).

Its probably not a DS19, rather a DS20, or "DSpecial/Dsuper".
DY3 Block will only take 2.1 litre liners and pistons that is the upgrade recommended, not sure but would guess 2.3 litre liners would need some engineering of the block
 

DS/ID

Member
I’m with John T on this. Old DS19 block is another species of animal. They won‘t fit. Different block all together.

Cheers
Andrew
 

faulksy

Active member
Manual 814 suggests that the 1985cc DY3 engine was fitted to D Specials from late 1972 on. You should be able to fit the 2175cc liners as suggested above but not the 2347cc ones.

Part of the reason 2.3L DX4&5 engines are more prone to overheating is that the pistons and liners have a larger diameter but the block is the same size so the volume of the water jacket is reduced.

1985cc pistons are 86mm, 2175cc pistons are 90mm and 2347cc pistons are 93.5mm dia.
 

DS/ID

Member
I stand corrected, I only saw “old DS19” and not the DY3 . Maybe it should have been headed ” old ID19 block”? I do agree the 2347 liners will give you overheating problems.

Cheers
Andrew
 

gerrypro

1000+ Posts
To alleviate the potential overheating problems maybe it would be necessary to upgrade the radiator to a DS23 style cross flow unit!
 

Buttercup

Well-known member
I stand corrected, I only saw “old DS19” and not the DY3 . Maybe it should have been headed ” old ID19 block”? I do agree the 2347 liners will give you overheating problems.

Cheers
Andrew
It was headed DY3, the misleading bit was the info of "old" DS19.
I would expect that most of us (except Gerry) would call longstroke 3 bearing as old, and shortstroke 5 bearing as not so old.
I acknowledge that there are those that consider the D era as "recent".
Similarly I get a bit huffy when someone refers to my round light Dees as IDs.

I recently received a gift of a Citroen front beam axle with hubs, steering arms and quarter elyptic springs...... reputedly to be 1921.
I guess thats "old"?
 

gerrypro

1000+ Posts
I like 'old' and am comfortable with that as a description for long strokers. I reckon the beam axle is 'ancient' i.e. horse and cart stuff! And as for anything post CX, it is positively 'space age' modern.
 

Buttercup

Well-known member
I like 'old' and am comfortable with that as a description for long strokers. I reckon the beam axle is 'ancient' i.e. horse and cart stuff! And as for anything post CX, it is positively 'space age' modern.
Oooohhhh CX..... waaaaay toooo modern!
 

Loudel

Member
My bad. The engine block is a DY3 from an early 70's DSpecial.
I do have 2175 pistons and liners (new Mahle) which I may use. Or sell
Dunno yet.
Thank you to all who have contibuted.
And I do have a CX25IE as well.
Plus a BX 19Tri
OMG, am I afflicted??
RegarDS
Lou
 
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