cold air and squealing pig

[footman]

So I have two questions that both have occured after I reasembled the engine.
1. The serpentine belt squeals like a pig for the first 10-15 seconds after I start the Jeep and then its quiet.  Too tight?  Too loose?
2.  I used the defroster today for the first time and I got nothing but cold air.  Is there a possability that the heater core is vapor locked or something?

[rocket]

1. too loose (do you have a spring loaded tensioner or is it manual?)
2. vapor locked?  probably not.  Did you let the engine warm up?  you may have a blockage or bad heater control valve.  Try flushing your system (get the prestone flush kit, it splices into your heater line and you hook a garden hose to it and force flush the system.  you can also get some stuff to add that will break appart the corrosion prior to flushing)

[mallcrawl]

also check that you got all the vaccume lines put back together right.
all the little flaps and valves in the ventilation system are vaccume driven

[rocket]

also check that you got all the vaccume lines put back together right.
all the little flaps and valves in the ventilation system are vaccume driven

good point, i missed the part where he rebuilt the engine

[mallcrawl]

the first time the vaccume pump goes out on a diesel makes you really aware of all the little vaccume driven stuff in your car

but I digress

[footman]

Thanks guys, I'll look into it.

[Gastank]

WATER PUMP!!!!
just a thought... you have no defroster heat.... serp belt squeals.... heater core just gets hot coolant from the water pump...
might be an indication that your water pump is on it's way out, or that there's an air pocket in those lines.
Just .02 of course

[rocket]

shouldn't be an air pocket, the radiator cap is usually the highest point in the system.  Though i've been wrong before

[mallcrawl]

speaking of air bubbles, one of my buddies in sandiego had a cherokee that we had to lift the front end of on ramps and fill the raditor while running the motor at about 2k to get all the air out.

[calvynandhobbs]

My 89 XJ has a closed cooling system so when I replaced my radiator I had to lift the rear end and open a valve that sits behind the back of the valvecover to clear the air bubbles. If anything ever goes wrong with my cooling system again I'm going to convert it to a normal cooling system.