Does anyone know what size vacuum line it is that runs across the back of the valve cover to the elbow that goes into the firewall. I broke mine in the process of adjusting valves and removing the heater hoses from the heater core. Looking to replace it with a rubber hose possibly. Need to know what size to use to accomplish that.Thanks -

I measured 0.165" O.D. which is nothing standard so probably is 3/16" line (probably shrunk on mine over time, 3/16 is .1875"). Using rubber hose is not advised with a vacuum line because it will suck it flat. I *think* fuel line rated rubber hose is designed to not collapse though, so that might work.

Does anyone know where to get a replacement line for that? If the rubber line may not be advised, I should see if I can get a replacement for that part.

I think I would just go into NAPA and tell them what you need. Tell them you are using it as a vacuum line.. Rubber hoses will work if they are the right stuff. The plastic vacuum line might be harder to find.

I think I will bring that line into the parts store and see if they can get me something that will work.That plastic line was pretty brittle after the heat and cool cycles. I barely hit the line, and it broke. Thanks for the help.

Get yourself a oil pressure line kit. It is only a few bucks and that plastic is about the same size. It comes in 6" length. If it is to curly slide a rubber windshield washer hose on it,that way it wont kink when you bend it.

I went down to the local hardware store and bought a 6 foot length of clear vinyl tubing for the 96 Dodge and replace all the plastic tubing with vinyl tubing... Worked good so far no problems with sucking flat either.

I took the curly nylon hose and hung it from a rafter with a big master pad lock on the other end for a day and it straightened it out very nicely.

Went to Napa, and they had some windshield wiper hose that works great. It is 5/32" hose.