I have a newly installed 2004 LQ4 installed in my truck. The problem I just noticed while putting the heater back in is that the heater needs a vacuum pump to operate the doors. On my old TBI engine there was a place on the intake manifold to get vacuum.
Is there some place on my 2004 intake in which I could install this vacuum line? My heater is from a 1980s truck.
thanks
1990 K2500 with Hummer Kit Body, LQ4, 4l80e 4x4
back left side of intake theyres a nipple ,cut it off and use hat for vaccuum.it is blocked off from factory .its about the only vacuum on the intake .
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
They have them for like 5 bucks at the dealership. Mine was blocked off on my intake but I was able to pick one up that actually fit back there.Originally Posted by ramsey rider
1951 3100
1984 C10
So I just ask them for the vacuum part or plug for the lq4 intake?
Just want to make sure I know how and what to communicate when I get down to the dealership.
Thanks
1990 K2500 with Hummer Kit Body, LQ4, 4l80e 4x4
Wo ,im I Getting This Right .you Just Need A Vauum Port Too Plug Nto ?if So Snip Off With A Pair Of Cutters ,the Little Titty ,on Back Of Left Side Intake .if Im Wrong Ducky, Sorry ,but Idk About No Part For A Vaac Port.huuum.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
Passenger side 3/4 the way back on the intake there should be the port referenced above. Just use side cutters to snip off the end.
The other reference if tfor the Vaccum assist brake port on the rear of the intake. I have not been able to locate one of those and from what I hear they are almost impossible to remove from a donor intake w/o problems. Also I have no idea if you just pull the blockoff plug out of the rear of the intake if your intake was a hydraboost model.
DD 95 Silverado LS1 4l80e conversion in progress
Turbocharged 70 Chevelle SS 454 9 seconds of fun
http://www.theturboforums.com/projec...t/waltpics.php
the right side was the one i sniped off to hook up vacum for heater on 04 4.8 motor, hose sliped right over, used a plastic zip tie to just make sure it stayed there
1987 jeep wrangler, 1999 LS 1, 4l60 231j transfercase, dana 30 frontend ford 8.8 rearend 3:73 gear ratio. sandersons shortie headers, 2.25 inch exhaust into 3 inch flowmaster muffler.
oh sorry I was referring to brake booster nipple that connects to the back on the intake
1951 3100
1984 C10
cool, just for clarification, my vacuume hose looks like it is about 1/8 inch or so in diameter on the outside and obviously much smaller than that on the inside. I will be able to snip this off small enough to slip the end of the hose onto it and then zip tie it?
Do I have this right. the end of the nipple should be pretty small then right?
1990 K2500 with Hummer Kit Body, LQ4, 4l80e 4x4
Ya Got It
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
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