engine type 2.1 or 1.9 dg or df

[T25daisy]

hi there is can somebody out there can help me with identifing my engine ive just bought.got it home and stripped it down for rebuild and cant find a dg or df on it anywhere ,ive looked on my one in the van and its an dg.the pistons are out ive measerd them like the book says and they are 15.5 to the bottom of the secound ring from the top so it says its an 2.1 ,am i right .when i bought the engine it had a carb on so i was told it wasnt a mv but im not sure anymore there is a number stamped on the where the prefix should be is 468 .open to any suggestions ta

[Ian Hulley]

Look on the flat area below the breather tower, it'll probably be a number with the all important prefix ... DG etc etc.

Running a carb means nothing, could still be a 2.1 ... the DJ/MV and SS all have injection as standard but that could've been replaced.

Ian.

[T25daisy]

thanks very much for the fast reply ivechecked there and its been rubbed off just the number left is there any other way to check ta ive sent the heads to be pressure tested for cracks i just want to identify the engine to order bearing ,rings. and gaskets

[Ian Hulley]

The 2.1's came with an oil cooler as standard .... a square block where the oil filter screws on ... not many 1.9's had that. The 2.1 thermostat housing has an outlet spigot which goes across the top of the left bank and the water pump has an extra outlet on the top which crosses to the oil filter block.

Ian.

[Ian Hulley]

BTW if you've got the carb nearby ... if it says 'Pierburg' on it it's from a DG if it's a PICT then it's definately a DF

[T25daisy]

its got an pieburg on it ive just checked thanks

[Ian Hulley]

its got an pieburg on it ive just checked thanks

Could still be a 2.1 of course

[lambrettalee]

or a df with a pierburg ... nowt wrong with a df either

[Ian Hulley]

nowt wrong with a df either

yeeeesssss, that's right

[T25daisy]

i hope its not df my lambretta goes faster than that

[simony]

nothing wrong with a DF

[T25daisy]

no offence intended just dont want to swap the engine i have for a slower one, she already finds hills a challenge ta for replies

[kevtherev]

and its been rubbed off just the number left

I doubt that a stamped letter would "rub" off
More likely that it's a replacement or reconditioned unit which had only a few numbers.
a closer look may reveal a star or a little VW logo after the numbers

if you find hills a challenge then it's not a 2.1

[T25daisy]

hi there yes its got an vw logo then the number 268, the rest has been ground of ,ive got a 1.9 in the van at the mo , im rebuilding the one ive just bought what is the diffence in pistons or bore from a 1.9 to 2.1

[kevtherev]

hi there yes its got an vw logo then the number 268, the rest has been ground of ,ive got a 1.9 in the van at the mo , im rebuilding the one ive just bought what is the diffence in pistons or bore from a 1.9 to 2.1

The VW logo indicates it's a Volkswagen genuine replacement engine... I doubt it has been ground off it's just unfinished casting.

94 mm Bore and Stroke is 68.9 mm in the 1.9 Compression Ratio. 8.6:1
94 mm Bore and Stroke is 76 mm in the 2.1 Compression ratio. 10.5:1

pistons are shorter in the 2.1 different crank, camshaft and and big end pins

what makes it different is, as you can see, the longer stroke, higher compression and valve timing.
i.e. sucks in more fuel... squeezes it more ....bigger bang

I know that the MV pistons are different from DJ.. so I'm guessing that DG ones are too being a lower compression engine