how to find EGR valve on 1.8 astra

hi guys, I know its a well asked question, but god help me i carnt find any good info on how to find egr valve on z18xe motor

main problem is the motor has a rattle/grind noise , someone said it might be egr valve has fallen apart, but it sounds like a pulley bearing has dried up, or water pump bearing has fallen apart, but it has new pump and new timing belt and pulleys,,altho it was a cheap kit. anyone had a pump bearing go on them?

From memory and I can’t remember the exact change over but your car doesnt have an egr valve.


Sent from my iPhone using Tapatalk

https://uploads.tapatalk-cdn.com/201...f22c513428.jpg
Egr would be where the D shaped cover plate is on the end of the head


Sent from my iPhone using Tapatalk

thank u so much guys, nope none there, so thats not the prob,,, its a rattle in the bottom end. i just checked water pump ,and all pulleys ,all good, sounds like it might be the main bearings or gudgen bearing,,,

Belt cover dragging on a pulley/belt? Aircon pump? Does it start when the aircon comes on or vice versa? Alternator condition?


Sent from my iPhone using Tapatalk

Hi SS, checked all above. sounds to me ether main bearings or gudgen pin bearing/bush, sounds like theres a bolts in bottom of motor rattling around. going to try a flush.might be pick up blocked.but id say its done/doing damage..

Good luck with it! Sounds like you have your work cut out!


Sent from my iPhone using Tapatalk

Thanks, its poor ol mums car, hope i can help her out. is there any chance u might know someone on here that might be able to write down what the codes it throwing, i really just carnt keep up with the flashes.. here is the vid of dash throwing the codes... https://youtu.be/4UWNy2xFTjw

Honestly, i tried to watch it and just got confused! I use an elm 327 bluetooth plug in module that talks to my samsung tablet. Cost all of $18 from memory. Much easier and it works on most of my modern cars.


Sent from my iPhone using Tapatalk

Thank u ,

Ended up getting a usb one. https://www.ebay.com.au/itm/ELM327-O...72.m2749.l2649

just hope car holds together till i get it in mail,and hope it shows something that may be causeing rattle, I know its not going to show internal problems but hopefully something.

doesnt say it works on opel/gm but im guessing it should.hmmm

can always get an Opcom. I have one of those bluetooth elm thingies and that works with the free Torque app on my Astra.

First of all, what I can gather from that video is codes P1130, P0170, P0130 and P1555. P0170 and P0130 are related to the O2 sensors. Z18XE has two, one pre-cat in the exhaust manifold and one post-cat in the exhaust, just behind the engine underneath the car. They run two sensors as the second one is to verify that the catalytic converter is present and functioning. P1130 is saying the front O2 is registering a signal that is outside the ECU's range. To me, that's sounding like a duff O2 sensor or the wiring in relation to it. Usually happens if the exhaust has been modified or some cheap Chinese sensors (personally I'd use genuine or a well known brand like NTK where possible).

P1555. This one is common to the Z18 engine and very easy to fix. Take the throttle body off the engine and use some carby cleaner with a rag or brush to thoroughly clean the barrel of the throttle body and the edges of the butterfly. Because they're drive by wire throttles, they're opened slightly at idle by the ECU to control idle speed. What happens is the gunk that ends up caked around the edges of the butterfly closes up some of that gap and the throttle body has to compensate by opening the throttle more. As a result, the throttle position sensor gives the ECU a reading higher than it expects and it then triggers the code. But as I said, very easy to fix and costs almost nothing. Can even do it without taking the throttle body off, but it's much easier taking it off.

As for Z18XEs having EGR valves, they do have them, but just not on the Astra variants. The XC Barina/Corsa C SRi has pretty much the same Z18 engine, but with an EGR valve up until around mid 2004. Somewhere along the line, Opel realised the EGR valves were pointless on petrol engines and did stuff all to improve emissions, not to mention, somewhat troublesome.

got the OBD2 today but carnt seem to download the scanmaster from anywhere..

what software do u guys use to read from a astra ts 1.8

The Opcom comes with it's own software which is what most people used. Now, in the Astra J, I use the free Torque app on my phone with an elm 327 mini Bluetooth adaptor but that also works on the TS.

thanx mate