Engine Codes

[coastline taxis]

got a rhz engine and a rhy engine in the corner of the garage and there the same. so what bits are diferfent according to the different engine codes

[techbod]

RHZ = jumpy/dispatch 1999-04 2.0 HDi 110bhp.

RHY = berlingo/C5/Xsara 90bhp

 

ECU would be the issue because of the BHP the rest is the same you could fit either to all the cars mentioned but the BHP would be different because of the ECU chip ( like chipping/flashing ) but both will work happily and no mods required

[coastline taxis]

RHZ = jumpy/dispatch 1999-04 2.0 HDi 110bhp.

RHY = berlingo/C5/Xsara 90bhp

 

ECU would be the issue because of the BHP the rest is the same you could fit either to all the cars mentioned but the BHP would be different because of the ECU chip ( like chipping/flashing ) but both will work happily and no mods required

have swapped 90 and 110 around on a few occasion with no mods or probs at all.just a simple swap over and there fine

[kfk]

The drifference between the engines will be the emissions regulations they have been designed to meet:

- as a consequence you cant guarantee the camshafts, the inlet /exhaust valves or the pistons/compression ratios are the same.

 

If they were the same they would have the same code.

 

I always advise customers that are looking to replace engines to only use one of the same code, its the only way you can guarantee internally it is the same.

 

I once had a customer who had fitted a peugeot 1.6 engine into a Citroen, on the face of it they were the same engine.......unfortunately the inlet and exhaust valves were larger and it was designed to operate with a totally diferent maker of the injection system......as a concequence the citroen bits would bolt on but the mechanical differences were such that the fuel injection system wasnt up to the job.

[Johndouglas]

. so what bits are diferfent according to the different engine codes

 

 

I believe they have different crankshafts and of course one doesn't have an intercooler.

[techbod]

I agree with KFK and john because there are the obvious differences like the turbo but a (full) transplant would be ok but the ECU on each would have a different program but that's not to say you cant upgrade the BHP on the 90bhp engine by adding a turbo all for 20hp seems a little pointless :( all the bits seem to be used by both engines without much change not sure about the crank shaft as this would be a Major change and not sure citroen would invest in retooling for that ?

[Johndouglas]

not sure about the crank shaft as this would be a Major change and not sure citroen would invest in retooling for that ?

 

But why not? Not all the XUD engines carried the same crankshaft. At a glance they might look the same but the width of the main bearing journals varied.

[techbod]

the XUD is an old engine design so when they upgraded to the c5 HDi a complete redesign was required although minor things did change to keep up with today's requirements and the later cars ie: 2007+ had the biggest changes when CAN bus was introduced and this is my main learning curve at the moment and its very interesting

[Randombloke]

the XUD is an old engine design so when they upgraded to the c5 HDi a complete redesign was required

 

XU and XUD are a very interesting engine series as it was, AFAIK, the first engine PSA had done where the diesel and petrol shared the same block.

 

IIRC the diesel side of XU went from 1769, including the most popular 1905 and also the 2088 12 valve XUD11. There were turbo and non turbo variants, except maybe for XUD11 which may have only been available with a turbo.

 

Some ideas seem to have come across from XU to DW - the cam belt drives only one cam in both cases, for the second cam on DW an internal chain is used? I think that DW is more upright than XU - which is canted back some way like a lot of earlier PSA engines.

 

The largest XUD engine had only one Woodruff key in the end of the crank where the cam belt and auxiliary drive pulley is, as I have found out to my cost!!

 

I think XU was in use for close to 20 years! Saw the first XU powered BXes in mid 1980s, and some Berlingos had XU up to 2003?

[techbod]

yes truly the XU series has been around a long time with many variants probably the best PSA developed personally don't know why they dropped it then again I cant understand why they dropped the DS as it was and still is the beauty ( personal view of course ) :(