Technical 1.3 Multijet EGR clean

[Skyperr]

I know in advance that this is supposed to be an utterly atrocious job but I may have to do it nonetheless. My car shows signs of a hesitancy / shake on light throttle around 1700rpm. A quick scan with MES shows no codes and the EGR solenoid itself responds OK to an actuation test.

I disconnected the air intake where it joins the manifold and the manifold is full of oily carbon. If I elect to clean it all out, is doing the EGR much easier with the manifold off? And does the cooling system need to be drained to remove the EGR cooler?

 

[tempz]

Its in a utterly stooopid place

I got the dealer to replace mine under warrenty.

Not touched it again in 55k

 

[Rackham115]

Remove the egr valve from the engine completely. Undo the egr valve from underneath, bring careful not to lose the gasket, remove the egr valve and the link pipe to the manifold. Then take it apart one its off the cad, much easier that way. In order to do this you should only have to remove 7 bolts and fhe egr is free. Problem is accessing the bolts on the underside of the valve, its all touch as you cant actually see them.

 

[Skyperr]

Remove the egr valve from the engine completely. Undo the egr valve from underneath, bring careful not to lose the gasket, remove the egr valve and the link pipe to the manifold. Then take it apart one its off the cad, much easier that way. In order to do this you should only have to remove 7 bolts and fhe egr is free. Problem is accessing the bolts on the underside of the valve, its all touch as you cant actually see them.

Thanks for the advice.

Does the cooling system need to be drained, and would matters be helped if the inlet manifold was removed first?

 

[Rackham115]

Thanks for the advice.

Does the cooling system need to be drained, and would matters be helped if the inlet manifold was removed first?

On my 1.9 i simply removed the EGR valve, no other parts and no draining required as it links from the exhaust to the manifold only. The link pipe should come away from the manifold (held on with 2 bolts) with the EGR valve.

Not sure if things are any different on the 1.3? Disconnect the battery too.

If you look in the guides section, there's a guide to cleaning the EGR valve, i followed this, my suggestion of removing the valve from below is in replacement to removing the entire link pipe via the circle clip.

 

[Rackham115]

Link to guide:
https://www.fiatforum.com/grande-punto-guides/178715-cleaning-egr-valve.html

The EGR valve can be removed without the long link pipe as pictured later in the guide but is just a bit fiddly as mentioned.

 

[Skyperr]

Unfortunately the setup on the 1.3 is different to the 1.9. And its much harder to clean too.

 

[Rackham115]

Ah right, didnt realise, apologies. you learn something new every day.

 

[Humour]

Unfortunately the setup on the 1.3 is different to the 1.9. And its much harder to clean too.

You didn't by any chance take a few pics. during the process Will? Would be cool to have a 1.3M-jet guide on how to do this.

If its that much of a PITA, I might just fork out the 90 squid to buy new and replace.

I would hazard a guess though that removing and cleaning the intake manifold/plenum all the way into the head inlet ports would provide a benefit if its all caked up in there.

I've seen the inlet plenum pipes on a 6cyl. BMW diesel with 100K on the clock and the amount of gunge build up was so much that close to 1cm of the inlet pipe diameter was lost to gunge. That means less air going into the cylinders and therefore less bang. I can only imagine the state of the Intercooler internally........if that had 1cm of gunge built up, it wouldn't be cooling much of anything. On that car I portioned the blame on the crank case breather pipe entering the intake just behind the MAF, running through turbo compressor housing all the way through piping and intercooler, intake, and finally into the cylinders, I didn't see if that engine utilised an EGR, it was one of the M51D25 engines. Even the inlet ports on the head looked like half the diameter holes they should be, until I run my finger through each one to clean the stuff out. It was shocking tbh

EGR and crankcase breathers into the intake on the basis of what I saw will kill efficiency and power over time!!!

It's also why if I was to fork out for an FMIC, I would be looking to blank the EGR and separate the crankcase breather into a pot to keep the intake clean like it should be.

Humour.

 

[Skyperr]

The only repair I've done was to clean the manifold / intake pipe joint. I've never worked on the EGR itself but as I suggested above, I'd be removing the intake manifold because if the EGR was full of crud, the likelihood will be that the manifold will be stuffed too. With the manifold off, access to the EGR and its plumbing should be a fair bit easier too.

 

[Humour]

Will, which manifold are you referring to, Inlet or Exhaust? I thought the EGR lives by the Exhaust mani.........

No point doing anything with the exhaust imo, its the inlet side piping intercooler ect. that would benefit from being clean.

Hum

 

[Skyperr]

Inlet manifold. It gets full of crap.