Question about 1988 Pontiac Firebird

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Need engine diagram of 1983 Pontiac Firebird

I need one so that I can replace the thermostat and heater core just havent really been able to get underneath and look for it Id rather know exactly where it is before I start being it is extremely cold lately.

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Now this depends,IF your car was equipped with a/c originally,replacing that heater core is going to be a pain in the behind.if it\'s not equipped with a/c,this will be a much simpler task.first things first,pop the hood of the car.on the passenger side,you\'ll see the housing for the blower motor,evap coil if a/c equipped.remove that entire box,label wires if need,go inside the car.start off by pulling the pass. side kick panel underneath the dash.then depending on the model,you may be able to get away with just pulling out the center console.once the glovebox is out,you can peek your head underneath the dash,and you\'ll see the heater box.i think there are a total of 4 bolts holding this sucker to the firewall.undo these bolts,and unhook the climate control cable which is connected at the top of the box.then,unhook all your vacuum lines,label if necessary or i could supply you with a vacuum line diagram courtesy of chilton.getting the box out is much simpler than going back in,i will admit this.i JUST got done doing this same job,and this took me well over 10 hours considering my dash dips down where the map pocket is located,therefor forcing me to pull my entire dash.if you don\'t have a/c,the dash doesn\'t dip,and gives you just enough room to squeeze that box back in once you have the core replaced.if you have to remove the dash,label everything.find sandwich baggies and label for screws,nuts and bolts.this will make life so much simpler.dash removal.since your glovebox should be out at this point,go to the drivers side.undo the lower dash panel,which is just beneath the steering column,this will expose the column shaft and retainer mount.drop the column and prop it up if you need to.the seat should hold that into,the upper dash should have 3 or 4 screws which need to come out.go back to the pass side and peek your head under where to glove dept was.your going to see 3 speed nuts which are securing the dash to the dash extention(mount).undo these speed screws,and go back to the drivers side.undo the obvious screws for the dash bezel which holds the guages.i think there are 4 screws at the top.once unscrewed this should pull right careful not to yank those guages out since i\'m sure the wires will be brittle after 30 years.unhook the volt and water temp guage first.right side of steering wheel(2 smaller guages).label the you have the remaining items exposed.start with the lighter,this has 2 small hex screws.unplug from the your wiper switch,which comes out the same way as the lighter.depending on model,you may have a rear defrost to unhook as well.ok,now you can remove the screws holding in your climate control module.pull it out,and stop.don\'t pull too far or you\'ll yank those vac lines right out.where the vac line is connected on the right side you\'ll see a screw.unscrew that puppy now you can swing that entire hookup to the left and it should just pop out.unhook the 2 wire harnesses hooked to the module and it should now be free to you want to disconnect the speedometer cluster.go under the dash and unclip the speedo cable from the has a push down clip,push it down and it should pop right you can pull that entire cluster toward yourself.label each and every wire accordingly and start pulling the wires and this will be,pop your head upder the dash one more time and look over where the parking assembly is located.if you have the parking brake pedal,that handle on the dash needs to come\'ll see a little retainer for the wire on the left side of the assembly.pop that off the clip,and pull that handle should just slide out with you\'re ready to drop that dash.lift up slightly at the top,and swing the bottom you\'re dash is completely out at this point.i would personally start off with that heater box,get that installed and THEN place the dash in place and start installing vise versa of which i just explained.this sounds like a lot of work,but once you do it,it\'s quite simple.i do know though,i never again in my lifetime want to have to pull that dash.what a,if you\'re thinking about changing up interior colors,i would honestly paint the dash while it\'s out making life easy at this point,eliminating you from having to do this job again in the future.take your time,and label every wire and every screw and you shouldn\'t have problems.good luck my friend!

Posted on Mar 06, 2013


You follow the top radiator hose to the thermostat
housing & remove 2 bolts

The heater core-- I would try flushing out from the
heater hoses,just don't use full garden hose pressure

Posted on Dec 10, 2012


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