Coolant Issues

**Scottydoggs** · 03-24-2013

under that cover is the coolant passage that you can hog out to open it up more for better flow. how to mod a lim post.

the 2 larger O rings maybe for the cast elbow or elbow. 04+ would used the large O ring for the t stat, older models use the gasket.

the orange ones should fit the manifold coolant ports. if you plug the holes you no longer need them. how to mod a lim thread again.

http://www.grandprixforums.net/how-mod-lim-46931.html

**dsmuts** · 03-24-2013

Long light blue ones are for a different style lim on the sides. Big black one is for thermostat. The other bigger black one is for the NA map sensor and so is the little blue one. Orange ones are lim coolant ports.

**TonyO** · 03-25-2013

wow seems like a lot of work.

**Scottydoggs** · 03-25-2013

Originally Posted by TonyO

wow seems like a lot of work.

not that bad really.

if you know your way around a engine and feel good about taking stuff apart, its a 3 hr job first time out. thats taking your time.

**The Guz** · 03-25-2013

The little blue seal is for the MAP sensor.

**dsmuts** · 03-25-2013

Originally Posted by dsmuts

The other bigger black one is for the NA map sensor and so is the little blue one.

Originally Posted by The Guz

The little blue seal is for the MAP sensor.

You don't say?

**Dagriffi** · 03-26-2013

I haven't had time to get back to the car since I cleaned up the gasket surfaces and torqued down the LIM, hopefully I'll get back to it tonight. I was reading into ways to clean the coolant system, like here: http://www.grandprixforums.net/dexco...edy-62341.html It seems some people in this thread think that putting DexCool back in is a good move. Why not switch to green, with all the problems DexCool causes? Also, his procedure makes it seem like he's draining/refilling with a hot engine. Seems sketchy, couldn't that potentially cause warpage/cracking issues?

I'd say 3 hours is right if I hadn't been trying to pull the LIM off with the engine mount in

**Scottydoggs** · 03-26-2013

if you drive the car with just water, and the rad cap on, yes you'll want it to cool down some before popping the cap, or you can get burnt up pretty good. 200 deg water and steam hurts bad.

**Scottydoggs** · 03-26-2013

the rule is: never add cold water to a hot engine when its off. if you must add when its hot, make sure its running. or able to run.

during the flush it will never over heat, because you have a hose full of cold water being fed to the engine, and your only idling the car.

**Dagriffi** · 03-26-2013

I was trying that.. it just will not go on. Something must have broken in it.. Zip ties for now. She fired up and idled smooth for a couple seconds! Not enough time for the flush tonight, probably this weekend. Many thanks guys, you've seriously been a huge help!

**Dagriffi** · 03-28-2013

10mm. haha, no I kept those together and used the torque sequence, so I would have known if some were missing (same for plenum). I was writing what each bolt set was on my magnet tray with a sharpie, and some overspray from cleaning the throttle body made it all illegible :/

**Dagriffi** · 03-26-2013

Wow, of all things I didn't see this being a problem...

The throttle connector, I can't get the plastic lock back down. Did the engineers get bored with regular clips and make a rubiks cube connector?

**Scottydoggs** · 03-26-2013

i dont have that on my car. hopefully someone will know.

**dsmuts** · 03-26-2013

Push it down as you push the clip on

**Dagriffi** · 03-28-2013

I must have mixed things up.. I was trying to use these for the two heater core hose brackets towards the back of the engine but the unturned diameter is too long. Does anyone have any idea what these two bolts actually go to???

Thanks,
Dan

**Scottydoggs** · 03-28-2013

what size head is that?

hope you didnt forget 2 lim bolts or something.

**Scottydoggs** · 03-28-2013

you bolt all the sensors back in? maybe you mixed on of them up, or a bracket for a sensor.

**dsmuts** · 03-29-2013

Map sensor bracket?

**Dagriffi** · 03-29-2013

I went to the local boneyard today and checked out another Grand Prix. Those are actually for the heater hose clamps in the back, I guess they wanted to give those some float with the unturned diameter.