Replaced the airbox lid on my 2000 (4.0) today as the old one was cracked on the side. Used a new rubber O-ring (very hefty O-ring!) to the MAF sensor side of the airbox.

The old one had a seal stuck to the cover, grey foam, that looked *maybe* like someone just added it in there. Which might explain why my airbox clips kept breaking (they were broken when I bought the truck and I replaced w/ some from junkyard, then the long clip cracked again and broke). This seal was keeping the airbox lid slightly high, and I wonder if it was actually causing an air leak.

Was this grey seal material stock / am I missing a seal - or does the lid just seal to the rubber of the air filter as I suspect?

Couple pics.


New on left, old on right

 

Looks like you are missing a clip at the MAF sensor side of the new cover.
I don't remember having foam on the cover but I'll check. Normally the air filter should seal the area when it's clamped down with the 2 clamps.

 

My D2 does not have any kind of additional seal in there, I think yours was added by a previous owner

 

Yes, thank you -- I think the prior owner or prior mechanic must have added it in when the airbox lid cracked. (I swapped the 2 MAF clips from old to new, when I took the pic I still hadn't moved one over)

 

Disco 2- duck taped

What is the pieces I circled in red?

Should I tape this piece down?

Is this normal looking or is this piece damaged?

 

Your second photo (with red circled area) is where a "clip" previously held your MAF sensor cable. Those clips often break. An inelegant repair is to use a long zip tie to hold the MAF cable secure, just so that the cable doesn't get stressed at the connection point to the MAF sensor. As for the duct tape: you'll soon enough know if the seal will hold without the attaching clips. Probably not!

 

IMHO duct tape in the engine compartment is certain future disappointment. Duct tape does not deal well with heat...of which there is much in there.