2.4 Inlet General 2.4 Inlet Manifold Questions
- Thread starter alanoo
- Start date
Lightning Coupé
Senior Member
Just typed a long post about me fitting the Manifold and TB today and bloody lost it :evil:
So the short of it is, I can confirm it fits the astra but its a fair bit harder than you think and there more things to modify, includidng the air con compresor that gets in the way. If your not a competent engineer your might struggle fitting it to be honest, and you really need a good set of torque sockets from E5 to E14. The good news is that I have photos from start to finish and 3 pages of notes I made as I went allong so I can post a good How-to for the Astra most of which will apply to the vectra. Ill post it up monday when I get chance, until then I'd hang off fitting yours as I learnt a bit from doing mine that will make your life easyer.
Anyway, Started up with 2.4 manifold and TB. Reved it up and the ecu went limp
. Disconected battery to reset, fitted original TB and the ECU went limp again when rev'd up. Scratched head, swore a bit, phoned a freind, relised I had fitted the 2.4 map sensor and changed it for the original. Sorted! took it for a spanking and everything seems sweet. No warning lights, no nothing, just a shed load more power up in the higher rev range. Will try the bigger TB back on tomorrow and report. Of to pub now!
So the short of it is, I can confirm it fits the astra but its a fair bit harder than you think and there more things to modify, includidng the air con compresor that gets in the way. If your not a competent engineer your might struggle fitting it to be honest, and you really need a good set of torque sockets from E5 to E14. The good news is that I have photos from start to finish and 3 pages of notes I made as I went allong so I can post a good How-to for the Astra most of which will apply to the vectra. Ill post it up monday when I get chance, until then I'd hang off fitting yours as I learnt a bit from doing mine that will make your life easyer.
Anyway, Started up with 2.4 manifold and TB. Reved it up and the ecu went limp
. Disconected battery to reset, fitted original TB and the ECU went limp again when rev'd up. Scratched head, swore a bit, phoned a freind, relised I had fitted the 2.4 map sensor and changed it for the original. Sorted! took it for a spanking and everything seems sweet. No warning lights, no nothing, just a shed load more power up in the higher rev range. Will try the bigger TB back on tomorrow and report. Of to pub now! 
Lightning Coupé
Senior Member
A word of warning then, when you pull the injectors out all the s**t and grit and small stones that sit in the recess the injector body sits in will fall into the head and if your valves are open, into the cylinder bore. Dosent tell you that in the frickin haynes manual. So before you remove them or the manifold, once the TB and ECU are out the way so you have better access, clean as much as you can get to, perhaps get a compressed air gun in and blow it all out best you can, or if you dont have a compressor use a can of air like the stuff pc world sell for cleanig your computer. If you get s**t in there your gonna ruin the cylinder bores. I was lucky and managed to get the s**t that fell in out with a tiny hoover nozzle I have, then wiped it out with a rag and finanly blew it out to be extra sure.
Lightning Coupé
Senior Member
andyroo said:
It feels like it pulls harder right to the red line now. Not so noticable low down in the revs, but I recon at least 10bhp up top. I recon it will be better again when I get the bigger TB on. I need to do about another 4 hours work or more to get it all fitting perfect. Remember, I have cams aswell and its not been mapped, so its far from ideal, and yet its made a big differance. Once Its all maped in, it should go like a rocket. P.s. I spoke to Thoney motorsprt on monday and there only a few weeks away from finalising a tuning pakage for these mods....
ASTRA2.2BADLAD
Regular Member
Cant wait to get mine need it before i leave vauxhall cos wen i in AA ill be doing it on the back street !!! How long now for the group buy!! Never removed one a these manifolds do you definatly have to remove all the studs or is it ok with just the nuts off ( removing the manifold)?? Cos if the studs snap thats gunna be s**te!!! notsure.gif
How long now for the group buy!! Never removed one a these manifolds do you definatly have to remove all the studs or is it ok with just the nuts off ( removing the manifold)?? Cos if the studs snap thats gunna be s**te!!! notsure.gif
Lightning Coupé
Senior Member
In all honesty I used the haynes manual to guide me along the way a little, and it recomended removing the injectors. I tryed to leave them in but it just didnt want to come out with them in the way. I'm not saying its imposible, perhaps youve just got the knack Vocky! smart arse but I found that even with the injectors out the air con pump pipe was in the way of removing the thing. Thats why I removed the pump and later bent the pipe a little to make way for the new manifold. I found the bottom rad brackets had to be removed too? Still its all done now and Ill get the instructions up soon, then if anyone else has trouble they know exactly what to do and if they find any short cuts they can be added.
but I found that even with the injectors out the air con pump pipe was in the way of removing the thing. Thats why I removed the pump and later bent the pipe a little to make way for the new manifold. I found the bottom rad brackets had to be removed too? Still its all done now and Ill get the instructions up soon, then if anyone else has trouble they know exactly what to do and if they find any short cuts they can be added.
Lightning Coupé
Senior Member
You definatly have to remove the studs, but there is only two of them and there not prone to rust or anything where they are, they should p**s straight out.
