1.9 jtdm Inlet manifold - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 
Thread Tools
(Post Link) post #1 of 11 Old 05-09-11 Thread Starter
Status: -
AO Silver Member
 
JON156VELOCE's Avatar
 
Join Date: Jun 2011
Location: United Kingdom
County: Cardiff
Posts: 2,216

Member car:

Brera 2.4

1.9 jtdm Inlet manifold

After reading lots of info about changing the inlet manifold because of swirl valve problems on the net, mainly on vauxhall and saab sites I changed mine as the acctuator rod kept coming off.
What a huge differance its made, low down torque is much improved and now pulls like a train from almost tick over. The old manifold flaps were well worn with lots of play in the bushes.
It was a bit of a job to change with a fair bit of time sussing out what has to come off but the main things were.

The fuel pump has to come off and then one of the 3 studs for the manifold to clear.

The cam belt can be left in place because you can bolt the pump pulley to the mounting bracket with 2 bolts, I used 2 of the cam cover bolts, I marked the belt to both to cam and pump pulleys just in case it moved but it was fine.

I bought the lastest standard of Pierburg manifold, part number 55210201 from a vauxhall parts place, its the same part number as thoses sold for Alfa's but 60 cheaper
JON156VELOCE is offline  
Sponsored Links
Advertisement
 
Status: -
AO Member
 
Join Date: Dec 2010
Location: I would rather not say
County: -
Posts: 291

Member car:

159

Does this problem occur on 1.9 JTDm 8v engines?

Thanks in advance.

Cona
cona is offline  
(Post Link) post #3 of 11 Old 08-09-11 Thread Starter
Status: -
AO Silver Member
 
JON156VELOCE's Avatar
 
Join Date: Jun 2011
Location: United Kingdom
County: Cardiff
Posts: 2,216

Member car:

Brera 2.4

No I dont think they do,I'm pretty sure the 115 bhp 8 valve in my 156 didnt have them
JON156VELOCE is offline  
 
Status: -
AO Member
 
Join Date: Dec 2010
Location: I would rather not say
County: -
Posts: 291

Member car:

159

Many thanks for the answer JON156VELOCE!

Best regards,

Cona
cona is offline  
Status: DB9 Top Gear Track
AO Silver Member
 
pubsinger's Avatar
 
Join Date: Jan 2007
Location: United Kingdom
County: East Sussex
Posts: 1,676
Hmmm, interesting. I did mine on the GT about 18 months ago, I couldn't get the manifold off as it fouled the casing the fuel pump mounts onto, had to (ahem) lose a bit of casing. Did you have any issues like that?

Thread detailling my experience.

All the best

Pub
pubsinger is offline  
Status: Loving my red Brembos!
AO Member
 
perksy's Avatar
 
Join Date: Oct 2009
Location: United Kingdom
County: Staffordshire
Posts: 841

Member car:

159 1.9Ti-alike

I did mine about 6 months ago.

Just a word of caution for anyone doing this themselves - make sure you very carefully observe the torque settings for doing up the fuel pump drive pulley. It should be 50Nm.

I gave mine a little extra to make absolutely sure it didn't come undone and heard a quiet "ping" sound. it turned out that I had put a TINY hairline crack in the pulley. You could see it at the very edge of the bolt if you looked carefully using a torch.

So, I couldn't (daren't) start the engine or move the car. Renewing the pulley would mean the cambelt coming off and doing that is something beyond my skill.

In the end I found a very reasonably priced, Alfa trained, mobile Alfa specialist to come out and do a complete cambelt (and pulley) change on my drive.

The pulley was covered in hairline cracks when it came off - I'm SO glad I got my torch out to investigate what the "ping" noise was - that pulley falling apart could have meant a wrecked engine!

James

perksy is offline  
(Post Link) post #7 of 11 Old 10-09-11 Thread Starter
Status: -
AO Silver Member
 
JON156VELOCE's Avatar
 
Join Date: Jun 2011
Location: United Kingdom
County: Cardiff
Posts: 2,216

Member car:

Brera 2.4

Thats a very good point James, I was quite suprised at how not overly tight the pump pulley was, I was expecting it to be very tight, I didnt Torque tighten it but retightened it to about the same as how it came off as I had read about the pulleys cracking on the vectra forums and had a good look aroung the centre when it was apart.
Pub, no I read your thread but didnt have any issues clearing the bracket, none of the how to guides mentioned it either so maybe your bracket was an early type, did you remove the stud.?
JON156VELOCE is offline  
Status: DB9 Top Gear Track
AO Silver Member
 
pubsinger's Avatar
 
Join Date: Jan 2007
Location: United Kingdom
County: East Sussex
Posts: 1,676
Yes, you can see in the 2nd photo the stud is out, but I couldn't for the life of me get the inlet manifold past the fuel pump mounting casing. If you look closely at that 2nd photo you can see how close the end manifold stud is to the casing, as it has to come off parallel to the head I had to grind that bit out of the way to allow it to come off.

Well, never mind, got there in the end.

All the best

Pub
pubsinger is offline  
Status: Loving my red Brembos!
AO Member
 
perksy's Avatar
 
Join Date: Oct 2009
Location: United Kingdom
County: Staffordshire
Posts: 841

Member car:

159 1.9Ti-alike

Another problem I had was removing/refitting the vacuum box (big black plastic box) from the rear/lower of the inlet manifold. Nightmare location to access. In the end I decided not to put it back where it came from and relocated it at the front of the battery.

James
perksy is offline  
(Post Link) post #10 of 11 Old 11-09-11 Thread Starter
Status: -
AO Silver Member
 
JON156VELOCE's Avatar
 
Join Date: Jun 2011
Location: United Kingdom
County: Cardiff
Posts: 2,216

Member car:

Brera 2.4

Quote:
Originally Posted by perksy View Post
Another problem I had was removing/refitting the vacuum box (big black plastic box) from the rear/lower of the inlet manifold. Nightmare location to access. In the end I decided not to put it back where it came from and relocated it at the front of the battery.

James
My car didnt have that, there is an oil breather seperator tank thats on a bracket in that position on top of the swirl valve actuator motor but it came out quite easily
JON156VELOCE is offline  
Status: -
Newbie
 
Join Date: Jun 2016
County: -
Posts: 7
Quote:
Originally Posted by JON156VELOCE View Post
My car didnt have that, there is an oil breather seperator tank thats on a bracket in that position on top of the swirl valve actuator motor but it came out quite easily
Really. I'm having a nightmare getting that bracket off. What's the trick
Jaredgt is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Alfa 159, Brera & 946 Spider

Tags
inlet , jtdm , manifold

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
Replace with
For the best viewing experience please update your browser to Google Chrome