Non scoob question but my 2nd day to day motor is Ford CMAx, it's got the dreaded EGR valve but I've given it a right good clean (half of 2L can of EGR cleaner) and it's working so much better. I know though, its only time before have to do it again. I was thinking I could just drill a hole in the egr alloy pipe and fit some sort of boss which I'll unscrew a bolt and spray the cleaner in, will then save taking off all the gubbins around the engine area which takes about an hour of the job.

What can I use to give a seal and yet allow a bolt to be unscrewed within a boss so I can put the cleaner can pipe down it to squirt into the egr vavle area? This alloy pipe is thin and doesn't run particularly high temps as gas is cooled.

 

Better option is to do away with the egr valve altogether. They run so much better without them. Have a search on some ford forums on how to do it

 

I've tried that and yes it runs even better, pulls with almost zero throttle, but only for a day as the dreaded PCM fault light comes on then she runs in limp. Unless I have a way to fool the PCM in thinking it's still there and flowing, I have to keep cleaning her on the odd occasion. It's a crap idea and can be dangerous if the unit sticks open wide...so I put a washer in there so if it does I only get hesitation on part throttle, enough to get me out of the crap.

 

Last one I did. I replaced a gasket on the egr to manifold with a plate with 2 small holes in just enough to let a little amount of gas in but not all of the **** that follows.

 

How big were the holes? I was thinking my washer has about a 4mm hole but could get one even smaller.