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Re: 68 ford mustang
This isn't going to be good news Im afraid. These symptoms are typical of head gasket failure.
Head gaskets can fail on one of 3 ways -
#1 Rupture to outside from cylinder - Lots of oil, steam, fire maybe - it's pretty obvious.
#2 Rupture from cylinder into an oilway - You burn lots of oil, blue smoke, lack of power, oil forced out of fillercap, dipstick, air filter gets black.
#3 Rupture from cylinder into coolant channel. You use water - but no leaks under car. White steamy exhaust on starting, Coolant overheats quickly and appears to boil. Inspection of coolant is sometimes oily.
Yours sounds like #3
It probably needs the cylinder head off and the gasket replaced. Quite a time consuming job, but DIY-able with the correct tools.
You can check the compression of the cylinders first just to make sure it is this and not leaks somewhere else -
Check out PetesPonies post on the mustang forum about leaks around the intake manifold. It may be easier to check this first.
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Probably a pin hole leak some where in a rubber type pipe, hose clips may need tightening or your radiator may have been damaged by a stone coming through the grill. You could try getting some one to sit in car and keep revs up on engine until you can see where any steam is coming from, beware steam is very hot. If you find the leak let engine fully cool down before starting any work.
try the thermostat, located on the top radiator hose. top side of engine. also does it steam?? does it lose water but no leak, does the heat blow hot? if your heat isnt hot and it steams and loses water you may have a cracked head or head gasket. if you have heat, doesnt lose water and doesnt steam it may also be your water pump. most pumps will leak visibly from the weep hole when running
no you can blow a head gasket even only getting it hot that one time, it doesnt take much, extreme heat is a engines worst enemy, i would replace head gasket right away and to be safe i personally change the thermostats in my vehicle atleast once a year. good luck
Ford water pumps have a "weep hole" on the bottom of the water pump. When the bearings go bad the coolant will weep from there. Also you may just need to get in there with a flashlight, probably from underneath the truck and see exactly where the steam is coming from. Check all the heater hose attachments and the radiator hoses. If you are lucky it may just be a worn out hose.
The smell is most likely the anti-freeze you smell. You may need a new overflow cap, which over time will not hold pressure like it should and can cause you engine to run hot and lose coolant. It could be the water pump leaking, a hose leaking. Can you see where you may be losing coolant at? How often does it run hot? Do you have to re-fill after it runs hot. If you not having to add coolant, then your thermostat may be bad or the water pump. But losing coolant could be the overflow cap or a hose, and let's not forget the radiator could have a small hole or split somewhere. It's a matter of finding out where or what are it is leaking in.
does the fan come on when supposed to? you could hook your fans to a toggle switch and run them manually from start to finish this may help. also did you bleed the system after replacing these parts and purge all air from cooling system? is the coolant coming out of the resovoir hose?