Inlet manifold goo.

helen&tony · Post by **helen&tony** » Wed Jul 11, 2007 2:10 pm

Hi
Having seen so many postings on the EGR valve, I’ve decided to remove it , or at least block it off. A question then comes to mind…what happens to all that crud in the inlet manifold?….does it simply get warm, vaporise, and get ingested by the engine? Or does it necessitate the removal of the inlet manifold to de- crud it? I’d be interested in people’s thoughts, as a de- blocked manifold would surely help the motor’s performance
Cheers
Helen

haydn callow · Post by **haydn callow** » Wed Jul 11, 2007 2:22 pm

I would have thought the same but it seems it does no harm just sitting there. If you ever have reason to remove the manifold then that is the time to clean it up.

smartmonkey · Post by **smartmonkey** » Wed Jul 11, 2007 2:41 pm

Sadly it won't just disapear over time - it's there to stay. It will slightly restrict the intake area and the surface is not conducive to good air flow so you will get an improvement by cleaning it. I doubt you would notice the improvement though, so if you do do it don't expect a transformation.

RobnKathryn · Post by **RobnKathryn** » Wed Jul 11, 2007 4:59 pm

Hi Helen

I disabled my egr AND cleaned out the inlet manifold. It was an obvious thing for me to do though, as I was replacing the cylinder head at the time.
I haven't noticed any improvement in economy, but the van does seem to run smoother and be more responsive. I can't attribute the improvement to the egr issue for sure because I did so much other work at the same time.
I think that had I made a special job of removing the inlet manifold to clean it out, I may have been disappointed by the lack of results!
Basically, the vans not going to die if you do it, and it's not going to die if you don't do it. So if you've got a spare day and want to do a crappy job then go for it...if not don't!
I cleaned my manifold by drawing rags soaked in petrol through it by the way.

Rob