Astra G C20XE/C20LET conversion guide

[mike23]

Does anyone know how 2 get speedo working

[dannyboi16v]

what box you running?

[mike23]

Original box to engine.

[dannyboi16v]

depends what engine you had in before, mine was a 2.2 and the speedo works off the hubs/abs, i put a c20xe into my old mk4 years ago which was a 1.4 16v which had a sensor in the top of the gearbox for the speedo but i cant remember how i got it working now...Doh

[H20LRW]

i have the same prob, im running a abs sub frame and shafts, & box, but not a abs car loom!. help!

[dannyboi16v]

i would imagine you have to run the wire coming from the sensor inn the top of the box into the ecu and then into the clocks? if your box does'nt have a sensor, it will have a bung in there which comes out if you need to fit one.. its just ontop the diff housing

[bucky]

hi ive put my redtop in to a astra mk4 van but when i went to bled cluch up the slave bust is this owt to do wi the cluh set up ive put in ive usd the standed redtop fly wheel a preser plat wi the diesal f23 box an cluch plat

Sorry i dont speak retard. Please at least try to use english next time. I have tried my best to make sense of your post, and by the sounds of it you are using an XE flywheel, XE pressure plate and F23 friction disc?
there are two types of XE flywheel/pressure plate combinations. Flat type and Pot type. the combination you will need to use is = Flat type XE flywheel, Flat type XE pressure plate and F28 friction disc(cav/cali turbo)

Does anyone know how 2 get speedo working

is the speedo not working at all? When we first put mine in with brand new 160mph white dials it was out by nearly 20%, we had to get tech2 on it and set the tyre size to get the correct readings.

[bucky]

i would imagine you have to run the wire coming from the sensor in the top of the box into the ecu and then into the clocks? if your box doesn't have a sensor, it will have a bung in there which comes out if you need to fit one.. its just on top the diff housing

this is correct

[bucky]

anyone got any info to add to this?

[GAZ`D]

there are different f23 gearboxes with different length bellhousings, if you use a vectre c diesel gearbox the bellhousing is longer to accomodate the duel mass flywheel and it will make the clutch release bearing travel further than it can and pop off releasing all the clutch fluid, you must use a none duel mass f23 gearbox

[dannyboi16v]

just a few of mine, mk4 camside mount, f23 box from dti 2.0 throttle cable from zafira

[gilly-06]

does anyone know what wires need to be joined to get the powersteering working ??

im sure it was working when i first started the engine but its not working now for some reason

[dannyboi16v]

have you connected the thin blue wire to your altenator off of the existing charging loom?

[zsfg]

I own a Astra 1999 mk4 stationwagon X20XEV with a F23 gearbox. I would like to change the engine to C20XE and use my F23. I know I need to use a C20LET frictiondisc (14 spines). According to different on-line databases my F23 tranny has 14 splines or 23 splines.
How can I find out which tranny I have?

Many thanks

[ripandy8]

Im doing a c20let into an astra coupe was originally a 2.2 do i need to run standerd coupe ecu aswell as the mk4 one anyone help please

[anniman1]

can the pot type f28 flywheel be used with the f23?

[TOBYC]

Im in the middle of putting a C20NE into my wifes Zafira which was origionally an X18XE1
On the X18XE1 the ecu is mounted on the rear of the engine. There are two plugs attached to the ecu, one is for the engine loom, the other is for the dash. Where do I connect these wires for the dash or do I need to leave them plugged in to the X18XE1 ecu for the clocks to work?

Thanks

[dave riley]

when i converted my van to get the speedo working i used a abs sensor from any wheel connect one side to earth and the other to the black and red wire behind the radio that controls the volume when your speed increases this got the speedo working and it was bang on with 16inch wheels. i now have all the gauges working without buying convertors ect if your using you standard ecu for the temp, strip all the engine loom away and just leave the temp gauge and earth the ecu this will allow the fans to kick in on there own and the gauge will work fine.

[dave riley]

just been looking at a clutch and flywheel package but it is a flat type flywheel for use with f28, can i use one of these with a f23 gearbox and slave cylinder for a z20let

[dannyboi16v]

yes you can, im using a flat type flywheel in an f23 with f23 clutch bearing

[anniman1]

so can you use a pot type as well from f28 onto f23. why does it have to be a flat typre as mine seems to fit

[c20let mk4astra]

great thread will come in handy when i do mine cheers

[dannyboi16v]

so can you use a pot type as well from f28 onto f23. why does it have to be a flat typre as mine seems to fit

can be pot or flat chap, ive tried both

[vxlgsi]

anyone know how to connect up origonal ecu so air con and engine rad fans dont always run.

[zsfg]

anyone know how to connect up origonal ecu so air con and engine rad fans dont always run.

Connect the rev wire (brown/blue) from the original ECU to pin 6 of the C20XE (M2.5) ECU. Your rev counter will work and the fans will stop.

You can't use the green rev wire of the C20XE.