If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
"Tommy Wood" > wrote in message ... > This vintage Explorer had a problem with leaking water via the intake > manifold gasket. You might try very gently tightening the intake manifold > bolts (the lower ones). Be careful because it's an aluminum intake manifold > and if you overtighten, the manifold may crack. > > This fixed my problem with water getting into the intake. I've replaced the intake manifold gaskets on both my Explorers within the last couple of years and I did the 4 step torque sequence and used gasket grade silicon along with the new gaskets and retorqued after waiting 24 hours so I don't *think* it's the manifold gasket but I'll check it anyway. If it's determined to be the head gasket(s) then I guess I'll be finding out how my intake manifold gasket job held up ;-) > > "Ulysses" > wrote in message > ... > > > > > wrote in message > > ups.com... > >> > >> Ulysses wrote: > >> > When my '92 EB with the 4.0 V6 has been sitting for a while it will run > >> > rough when I first start it up and white smoke comes out of the > > tailpipe. > >> > >> White smoke can be caused by coolant leaking into the cylinder from a > >> bad head gasket. That jibes with it happening after sitting for a > >> while, and when started running rough and then smoothing out. > >> > >> If that's the case, you should be losing coolant, and maybe > >> overheating. One check is to fill the radiator but leave the cap off, > >> start it, push hard on the brakes, put it in gear and rev it a LITTLE- > >> 1200 rpm. Slip the clutch if it's a manual. The idea here is to load > >> the engine to increase combustion pressure in the cylinders. > >> > >> Have someone observing the radiator coolant- if you have a bad head > >> gasket, exhaust should get into the coolant, making it bubble and > >> surge. The escaping exhaust forms big bubbles in the water jacket and > >> pushes its way out thru the radiator cap opening. > >> > >> If the level just changes slightly when you rev and expands as it warms > >> up, all that's normal. > >> > >> You have two, right? You can also compare them. > >> -Paul > >> > > > > Thanks Paul. This sounds like a very likely cause of my problem. I has > > been losing coolant too but I didn't think the problems were related. It > > has been "boiling over" and losing coolant through the top of the > > reservoir. > > Bubbling exhaust from a leaking head gasket could do that, right? Could > > that also have caused my radiator to burst? I need to put in a new > > radiator > > before I continue but I just wanted to make sure it was worth putting any > > more money into it. Sounds like it may continue to live. > > > > Yes, I have two and the other one recently started losing coolant too in > > the > > same way so maybe a comparison won't help much. I'm pretty sure the other > > ('91) needs a new fan clutch (it turns freely when th engine is warmed up) > > and I think the thermostat is OK but now it sounds like it may have a bad > > head gasket too. > > > > > > > > > > > > |
Ads |
#12
|
|||
|
|||
> wrote in message oups.com... > > Tommy Wood wrote: > > This vintage Explorer had a problem with leaking water via the intake > > manifold gasket. You might try very gently tightening the intake manifold > > bolts (the lower ones). Be careful because it's an aluminum intake manifold > > and if you overtighten, the manifold may crack. > > > > This fixed my problem with water getting into the intake. > > > > Interesting. In that case, the "loading the engine" test wouldn't show > anything because exhaust wouldn't be getting into the coolant. But it > seems like it would REALLY suck coolant at idle, so it wouldn't smooth > out. > > How'd you figure it out, and what were the symptoms? > -Paul > On my '91 it was easy to determine the manifold was leaking because water was pouring out next to the thermostat housing. On the '92 it was gradually losing coolant and there were water marks at the rear and when I pulled the manifold I could see it was getting wet in a couple of the ports. I had suspected a possible head gasket leak back then but decided to go after the intake manifold first and stopped there because I had found a problem. It just wasn't the ONLY problem it seems. Right now I'm looking at a new radiator, new thermostat, new fan clutch, new intake manifold gasket, new head gaskets, new piston rings (oh, and I suppose a valve job and complete rebuild would be in order), and a new Explorer. That computer controlled brake traction thingamajig they have now is very appealing (if it actually works). Now I need to find out which engine it is that I don't want--Google time. Oh, and it finally got it's first dent and they don't seem to have any Wild Strawberry touch-up paint any more. Hmmm... the AC doesn't work, the windshield is cracked, it finally got a rip in the leather upholstery, and the steering pump leaks. Maybe doesn't want a 91-94! |
#13
|
|||
|
|||
> wrote in message oups.com... > > Tommy Wood wrote: >> This vintage Explorer had a problem with leaking water via the intake >> manifold gasket. You might try very gently tightening the intake >> manifold >> bolts (the lower ones). Be careful because it's an aluminum intake >> manifold >> and if you overtighten, the manifold may crack. >> >> This fixed my problem with water getting into the intake. >> > > Interesting. In that case, the "loading the engine" test wouldn't show > anything because exhaust wouldn't be getting into the coolant. But it > seems like it would REALLY suck coolant at idle, so it wouldn't smooth > out. > > How'd you figure it out, and what were the symptoms? > -Paul > The evidence is white carbon build up on spark plug #5 and engine pinging. I didn't really figure it out myself. Most of the hints were here in this newsgroup. However, I think I may be one of the first to try tightening the intake manifold bolts (most folks replaced the gasket with a better designed gasket). I find that because the manifolds are aluminum, they loosen up every year or so and so I just retighten a little bit maybe once a year or two. So, far, it's worked for me because I really don't want to replace the gaskets (looks like a lot of work - too much stuff to remove to get to them). |
#14
|
|||
|
|||
"Ulysses" > wrote in message ... > > > wrote in message > oups.com... >> >> Tommy Wood wrote: >> > This vintage Explorer had a problem with leaking water via the intake >> > manifold gasket. You might try very gently tightening the intake > manifold >> > bolts (the lower ones). Be careful because it's an aluminum intake > manifold >> > and if you overtighten, the manifold may crack. >> > >> > This fixed my problem with water getting into the intake. >> > >> >> Interesting. In that case, the "loading the engine" test wouldn't show >> anything because exhaust wouldn't be getting into the coolant. But it >> seems like it would REALLY suck coolant at idle, so it wouldn't smooth >> out. >> >> How'd you figure it out, and what were the symptoms? >> -Paul >> > > On my '91 it was easy to determine the manifold was leaking because water > was pouring out next to the thermostat housing. On the '92 it was > gradually > losing coolant and there were water marks at the rear and when I pulled > the > manifold I could see it was getting wet in a couple of the ports. I had > suspected a possible head gasket leak back then but decided to go after > the > intake manifold first and stopped there because I had found a problem. It > just wasn't the ONLY problem it seems. Right now I'm looking at a new > radiator, new thermostat, new fan clutch, new intake manifold gasket, new > head gaskets, new piston rings (oh, and I suppose a valve job and complete > rebuild would be in order), and a new Explorer. That computer controlled > brake traction thingamajig they have now is very appealing (if it actually > works). Now I need to find out which engine it is that I don't > want--Google > time. > > Oh, and it finally got it's first dent and they don't seem to have any > Wild > Strawberry touch-up paint any more. Hmmm... the AC doesn't work, the > windshield is cracked, it finally got a rip in the leather upholstery, and > the steering pump leaks. Maybe doesn't want a 91-94! > Oh, yeah, one of the other symptoms was I was losing a pint or so water every month with no evidence of leaking. Forgot about that. |
#15
|
|||
|
|||
> wrote in message ups.com... > > Ulysses wrote: > > When my '92 EB with the 4.0 V6 has been sitting for a while it will run > > rough when I first start it up and white smoke comes out of the tailpipe. > > White smoke can be caused by coolant leaking into the cylinder from a > bad head gasket. That jibes with it happening after sitting for a > while, and when started running rough and then smoothing out. > > If that's the case, you should be losing coolant, and maybe > overheating. One check is to fill the radiator but leave the cap off, > start it, push hard on the brakes, put it in gear and rev it a LITTLE- > 1200 rpm. Slip the clutch if it's a manual. The idea here is to load > the engine to increase combustion pressure in the cylinders. > > Have someone observing the radiator coolant- if you have a bad head > gasket, exhaust should get into the coolant, making it bubble and > surge. The escaping exhaust forms big bubbles in the water jacket and > pushes its way out thru the radiator cap opening. > > If the level just changes slightly when you rev and expands as it warms > up, all that's normal. > > You have two, right? You can also compare them. > -Paul Well, since I don't have a radiator on the '92 at the moment I did the bubble test on the '91 and got some nice, big bubbles. That would explain the overheating. At least by the time I'm done doing the '92 (assuming it's just a head gasket and not a cracked head or block) I'll have some experience when I tackle the '91. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
QUESTION: 1996 GT Intake Manifold | EADGBE | Ford Mustang | 3 | June 26th 05 08:43 PM |
cold air intake question | Defiant | Ford Mustang | 3 | June 19th 05 12:01 PM |
Intermittent stumble, intake backfire on '94 Suburban | [email protected] | Technology | 3 | March 3rd 05 01:13 PM |
intake or head gasket bad...need opinion... | scale | Technology | 4 | February 20th 05 10:02 PM |
Rochester 4gc accelerator pump intake | Todd | Antique cars | 0 | May 25th 04 04:21 PM |