I'm installing a mechanical gauge and need to run the vacuum line from the engine bay to inside on the drivers side. The only grommet I found was on the right side (facing the engine bay) behind the coolant reservoir but unfortunately it doesn't appear anything is going through that.

I did a Google search and didn't really get any help and I don't want to drill if I can help it. Thanks for any help/ideas.

 

I ran amp cable from batt. across back of engine nad then groumet on right side if ur looking at hte engine and it comes by the pedals if thats any help.

 

Do you have a pic of the grommet you went through or tell me what its near? That would help out a ton cause like I said the only one I can visibly see is the one I can't put anything through.

 

I ran a PA system through my firewall and the only gromet I could find is the one behind the coolant like you said

 

i can tomoro when its light out ...but its jus to the left of the master cyl.

edit: it will have a black rubber piece in it so it blends but just push or pull it out

 

Finally got into the grommet behind the coolant reservoir. Easiest way was to take my air intake off then once I unbolted the two bolts on the reservoir it was more manageable. Once that's done get underneath the dash and look for the corresponding grommet which is behind and above the parking brake where the thicker harness is. Push out and there you go.

Now getting a vacuum hose through it was a little difficult but if you grab a decent sized flat head screwdriver and use it as a pry tool by wedging it between the grommet and harness then run your tube/wire through it was pretty easy, I also used a tad bit of brake cleaner to make it easier for the line to go through. If you have any questions ask and I'm not sure why this was such hard info to figure out cause Google doesn't show jack for this topic.