Smoking Vents? - Page 2

Capri306 · 06-27-2005, 10:47 PM

That drain you're seeing fluid come from is actually for the a/c evaporator, to let condensation from it escape to the outside. That's just a side effect that it'll also allow coolant to drain from it, if the heater core ruptures, albeit a cool one.

As for the radiator cap: it needs to be rated 13-16 pounds because this is what keeps the coolant in the system from BOILING! which is a VERY bad thing to have happen inside your engine.

Remember, water boils at sea level and one atmosphere, at 212 degrees Fahrenheit. Your coolant certainly gets hotter than this inside the engine; 195 degrees is when the thermostat starts to open. I can't remember the exact number, but it's around the neighborhood of raising the boiling point by 13 degrees for every pound of pressure you put on the system.

Many people think that the lower pressure caps will spare their failing systems from blowing more holes, but honestly it's not helping that much. If your heater core can't handle 13 psi, it's not going to handle 7 psi very long.

Okay, enough from me, I'm gonna go watch the fireworks outside the neighbors are lighting off.

tmoss · 07-01-2005, 07:10 AM

I hate to say it, but it may be a failed head gasket. Hope not, but keep that in mind and do a compression check.

Rosco · 07-01-2005, 11:23 AM

Well it is a head gasket. So I have to get around to doing those asap. I was looking up some part #'s and such, and my question is now, should i change the head bolts as well when i change the head gaskets? A couple places recommended it, but I am not sure if it is absolutely neccesary

tmoss · 07-01-2005, 12:24 PM

Yes, absolutely put new ARP head bolts in it.

Rosco · 07-01-2005, 03:30 PM

Is there anything else recommended that I change whilst the heads are off? I know i have to get all new gaskets for everything, just wasn't sure if i should replace or check anything else? The motor has a little over 82k on it. I was also wondering if it is absolutely necessary to remove the pushrods before remove the heads? I have a couple mustang books, and only one of them refers to removing the pushrods prior to removing the heads? Thanks alot everyone

tmoss · 07-01-2005, 03:41 PM

Yes, you have to (should any way) remove the pushrods.

ralph s · 07-06-2005, 03:21 PM

a leaky intake will do that. will also let coolant into the valley where it mixes with oil.
then things run hot. then other gaskets fail. i found out the expensive way. checked your oil? the color of my oil wasnt so different. 6 + quarts were. thats what set me lookn at the gaskets like they was gonna tell the future.

Rosco · 07-06-2005, 05:22 PM

hmm..wondering if it was maybe just an intake gasket leak then....both heads had 2 miscolored intake ports...Oh well, the heads are off, so it's time for some new gaskets

06-27-2005, 10:47 PM	#1
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Re: Smoking Vents? That drain you're seeing fluid come from is actually for the a/c evaporator, to let condensation from it escape to the outside. That's just a side effect that it'll also allow coolant to drain from it, if the heater core ruptures, albeit a cool one. As for the radiator cap: it needs to be rated 13-16 pounds because this is what keeps the coolant in the system from BOILING! which is a VERY bad thing to have happen inside your engine. Remember, water boils at sea level and one atmosphere, at 212 degrees Fahrenheit. Your coolant certainly gets hotter than this inside the engine; 195 degrees is when the thermostat starts to open. I can't remember the exact number, but it's around the neighborhood of raising the boiling point by 13 degrees for every pound of pressure you put on the system. Many people think that the lower pressure caps will spare their failing systems from blowing more holes, but honestly it's not helping that much. If your heater core can't handle 13 psi, it's not going to handle 7 psi very long. Okay, enough from me, I'm gonna go watch the fireworks outside the neighbors are lighting off. __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

07-01-2005, 07:10 AM	#2
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: Smoking Vents? I hate to say it, but it may be a failed head gasket. Hope not, but keep that in mind and do a compression check. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

07-01-2005, 11:23 AM	#3
Rosco Registered Member Join Date: Mar 2002 Location: Vestal, NY Posts: 307	Re: Smoking Vents? Well it is a head gasket. So I have to get around to doing those asap. I was looking up some part #'s and such, and my question is now, should i change the head bolts as well when i change the head gaskets? A couple places recommended it, but I am not sure if it is absolutely neccesary __________________ 1989 Mustang 5.0 Conversion, Full Saleen ground effects and spoiler, '94 saleen decal set, '93 Saleen Seats, Black interior from a '93, Steeda quadrant, smog pump delete, a/c delete, Steeda Tri-Ax shifter, '97 rear differential, aluminum driveshaft, 5 lug conversion, '97 rear disc brakes, southside upper and lower control arms, '99 GT Anniversary wheels, flowtech longtubes, flowtech offroad H-pipe, saleen lowering springs, kyb shocks, caster/camber plates

07-01-2005, 12:24 PM	#4
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: Smoking Vents? Yes, absolutely put new ARP head bolts in it. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

07-01-2005, 03:30 PM	#5
Rosco Registered Member Join Date: Mar 2002 Location: Vestal, NY Posts: 307	Re: Smoking Vents? Is there anything else recommended that I change whilst the heads are off? I know i have to get all new gaskets for everything, just wasn't sure if i should replace or check anything else? The motor has a little over 82k on it. I was also wondering if it is absolutely necessary to remove the pushrods before remove the heads? I have a couple mustang books, and only one of them refers to removing the pushrods prior to removing the heads? Thanks alot everyone __________________ 1989 Mustang 5.0 Conversion, Full Saleen ground effects and spoiler, '94 saleen decal set, '93 Saleen Seats, Black interior from a '93, Steeda quadrant, smog pump delete, a/c delete, Steeda Tri-Ax shifter, '97 rear differential, aluminum driveshaft, 5 lug conversion, '97 rear disc brakes, southside upper and lower control arms, '99 GT Anniversary wheels, flowtech longtubes, flowtech offroad H-pipe, saleen lowering springs, kyb shocks, caster/camber plates

07-01-2005, 03:41 PM	#6
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: Smoking Vents? Yes, you have to (should any way) remove the pushrods. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

07-06-2005, 03:21 PM	#7
ralph s Registered Member Join Date: Oct 2004 Location: idaho falls id Posts: 51	Re: Smoking Vents? a leaky intake will do that. will also let coolant into the valley where it mixes with oil. then things run hot. then other gaskets fail. i found out the expensive way. checked your oil? the color of my oil wasnt so different. 6 + quarts were. thats what set me lookn at the gaskets like they was gonna tell the future. Last edited by ralph s; 07-06-2005 at 03:24 PM.. Reason: more info

07-06-2005, 05:22 PM	#8
Rosco Registered Member Join Date: Mar 2002 Location: Vestal, NY Posts: 307	Re: Smoking Vents? hmm..wondering if it was maybe just an intake gasket leak then....both heads had 2 miscolored intake ports...Oh well, the heads are off, so it's time for some new gaskets __________________ 1989 Mustang 5.0 Conversion, Full Saleen ground effects and spoiler, '94 saleen decal set, '93 Saleen Seats, Black interior from a '93, Steeda quadrant, smog pump delete, a/c delete, Steeda Tri-Ax shifter, '97 rear differential, aluminum driveshaft, 5 lug conversion, '97 rear disc brakes, southside upper and lower control arms, '99 GT Anniversary wheels, flowtech longtubes, flowtech offroad H-pipe, saleen lowering springs, kyb shocks, caster/camber plates

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