Cleaned out my EGR
I've had a standing fault on the dash for ages, supposedly with the Diesel Temp Sensor. However, of late the car has had really lumpy idle and low power....more like the EGR.
Anyway, today I knuckled down and took the EGR off. It was completely clagged up. Entirely full of soot.
I didn't do the full drill-and-tap-out job, but I cleaned it very thoroughly with carb cleaner and oiled the solenoid shaft. Back together and...wow. What a difference. And what's more, the standing fault has gone from the dash. Car runs better than it has in a long time.
To be fair, I'm not sure if the EGR clean did the trick with the Diesel Temp Sensor fault. It may be coincidence. Also, I swapped out the fuel filter at the same time and it had a lot of crap in it (from cheap diesel?) So maybe the sensor it was complaining about was the one under the fuel filter?
I celebrated by giving the car a jet wash. Like, probably the fourth time in as many years.
So...if you're thinking about doing it - DO IT!
On the 159 1.9 JTD you need 10mm and 13mm sockets and also either a deep 10mm socket or a 10mm spanner as two of the nuts have long threads above them.
First take off the engine mount bracket attached with two 10mm nuts to the left hand side (behind the EGR).
Then loosen completely (but don't remove) all four 10mm bolts attaching the EGR to the engine. With one hand, remove all four screws while holding the EGR against the engine with hand number two. Then with hand number three...oops.
Carefully remove the square gasket while pulling the EGR away from the engine.
Next loosen but don't remove the two 13mm bolts on top of the EGR. Then carefully remove the bolts, lift the EGR with one hand and remove the second gasket from under the EGR. You can then take it all out.
A couple of left over questions for me:
1. I noticed one of the bolts holding the EGR to the body was a bit loose. When I put it back I can't tighten it fully. I think it's been over-tightened. The gasket seems tight, but my OCD worries about this. Is there a way I can "re-thread" the hole?
2. Although the engine is great, when I rev high then take my foot off, as the revs bounce down, there's a sort of "cough". Can't describe it any better. The engine jumps a bit. IS THIS NORMAL?