Too much pressure! - Page 2

75K30 · 03-19-2008, 09:26 AM

Joe is refering to a hydro-lock situation. This is where a cylinder will fill up with water / coolant to the point where it cant escape. When the piston tries to come up, the water will not compress and the engine will not turn over at all.
After you got the "Jeep" fired up, did you see any water coming out of the exhaust pipe? This is a real good indication that the cylinder had water in it.

dawright_1988 · 03-19-2008, 11:45 AM

Quote:

Originally Posted by 75K30

Joe is refering to a hydro-lock situation. This is where a cylinder will fill up with water / coolant to the point where it cant escape. When the piston tries to come up, the water will not compress and the engine will not turn over at all.
After you got the "Jeep" fired up, did you see any water coming out of the exhaust pipe? This is a real good indication that the cylinder had water in it.

Wow! That makes a lot of sense and sounds scary. I will definently look for that when I start it up (if I CAN start it up) when I go home today. I guess in that situatuion, you would be trailering it home huh?

75K30 · 03-19-2008, 12:24 PM

Quote:

Originally Posted by dawright_1988

Wow! That makes a lot of sense and sounds scary. I will definently look for that when I start it up (if I CAN start it up) when I go home today. I guess in that situatuion, you would be trailering it home huh?

Nah, not quite that bad. All you would have to do, is remove the park plug and turn the engine over. The wet cylinder will pump the water out, and it will fire again.
If the head gasket is blown, there will be damage, real damage sooner or later, but in a pinch, spark plug removal will drain a filled cylinder.

dawright_1988 · 03-19-2008, 03:55 PM

I started it up after work today and it started without hesitation. There was no water that I could see, coming out of the exhaust. But when I pulled into the driveway at home... it stalled out. When I tried to start it up, it acted like it didn't want to start. After about 7 or 8 cranks, it started and ran fine. I am totally confused.
BTW, the cranks that it takes to get it started some times are slow and groany. I know this sounds silly but... could my problem just be a bad battery? I know that a bad battery can make some wierd things happen. Can it make your truck stall? I have no way to tell how old the battery is but it looks abused. There is, after all, a ratchet strap holding it in place.

mudseeker · 03-19-2008, 04:41 PM

well, if it was the battery, i doubt it would start after stalling out. did you check the voltage at the battery terminals?

crabtruck · 03-19-2008, 05:43 PM

Poor connections from your battery can do that.

dawright_1988 · 03-19-2008, 09:10 PM

OKAY GUYS! Today, it started squealing really bad on my way to the mall tonight. It sounded like a belt, but the belt is tight because I tightened it the other day.
This is what my dad has diagnosed the blue monster with...
The stalling, the excessive coolant pressure, the hard cranking, the squealing... all could have to do with a BAD WATER PUMP!
I never thought of it...
He's my dad and I love him, but... I still wanna double check with you all. What do you think?

junior3382 · 03-20-2008, 01:50 PM

Could be a water pump, but if that was the case, the pressure would go down not up. Although it the squealing you heard could have been more like bearings needing grease, yea, could be a problem. But might just me another symptom. What I mean by that is that if I am understanding all this correctly, the pressure is UP, not down, and if that is the case, could have added more stress to the water pump, therefore causing it to go. When the truck is idling with the radiator cap off, you should see the coolant moving, or flowing, and if that is the case, the pump is working, just might be working to hard. Just my thoughts here, feel free to tell me to shut up if I am way off......LOL.

jdfenske · 03-21-2008, 04:48 AM

if it is leaking coolant past the head gasket, i'd be careful trying to start it. i've bent connecting rods trying to start engines that's had water on top of the piston, as water will not compress, no matter what. science proves it again and again.

you'd be amazed how much torque starters have, after going thru the flywheel and then the angle of the crank/rod to the piston.

87c10slammer · 03-21-2008, 07:42 AM

i think he mean hydro lock and it wouldnt have cranked at all. if it turned over easy i would try a new thermostat. if it is bad then youll have the same problem

03-19-2008, 03:55 PM	#14
dawright_1988 Senior Member Join Date: Apr 2007 Location: Adrian, MI. Posts: 155	I started it up after work today and it started without hesitation. There was no water that I could see, coming out of the exhaust. But when I pulled into the driveway at home... it stalled out. When I tried to start it up, it acted like it didn't want to start. After about 7 or 8 cranks, it started and ran fine. I am totally confused. BTW, the cranks that it takes to get it started some times are slow and groany. I know this sounds silly but... could my problem just be a bad battery? I know that a bad battery can make some wierd things happen. Can it make your truck stall? I have no way to tell how old the battery is but it looks abused. There is, after all, a ratchet strap holding it in place. __________________ "You can polish a piece of junk all you want, but in the end, all you're left with is shiny junk."

03-19-2008, 09:10 PM	#17
dawright_1988 Senior Member Join Date: Apr 2007 Location: Adrian, MI. Posts: 155	OKAY GUYS! Today, it started squealing really bad on my way to the mall tonight. It sounded like a belt, but the belt is tight because I tightened it the other day. This is what my dad has diagnosed the blue monster with... The stalling, the excessive coolant pressure, the hard cranking, the squealing... all could have to do with a BAD WATER PUMP! I never thought of it... He's my dad and I love him, but... I still wanna double check with you all. What do you think? __________________ "You can polish a piece of junk all you want, but in the end, all you're left with is shiny junk."

03-20-2008, 01:50 PM	#18
junior3382 Senior Member Join Date: Mar 2007 Location: Currently, I live in Lancaster county, Pennsylvania. Posts: 3,170	Could be a water pump, but if that was the case, the pressure would go down not up. Although it the squealing you heard could have been more like bearings needing grease, yea, could be a problem. But might just me another symptom. What I mean by that is that if I am understanding all this correctly, the pressure is UP, not down, and if that is the case, could have added more stress to the water pump, therefore causing it to go. When the truck is idling with the radiator cap off, you should see the coolant moving, or flowing, and if that is the case, the pump is working, just might be working to hard. Just my thoughts here, feel free to tell me to shut up if I am way off......LOL. __________________ *The Blazer is dead, so I pumped her with lead, laid her to bed, and bought a FORD instead!*

03-21-2008, 04:48 AM	#19
jdfenske Senior Member Join Date: Jan 2008 Posts: 105	if it is leaking coolant past the head gasket, i'd be careful trying to start it. i've bent connecting rods trying to start engines that's had water on top of the piston, as water will not compress, no matter what. science proves it again and again. you'd be amazed how much torque starters have, after going thru the flywheel and then the angle of the crank/rod to the piston. __________________ 1996 Z71 white shortbox tinted 350 30 over cats and X pipe Alumhds ported 210 cc runners 62 cc chambers 2" int 1.550" ex crane lift; 580/580 duration; 216/222 4L60E w/shiftkit

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03-19-2008, 09:26 AM	#11
75K30 Senior Member Join Date: Jul 2006 Posts: 3,312	Joe is refering to a hydro-lock situation. This is where a cylinder will fill up with water / coolant to the point where it cant escape. When the piston tries to come up, the water will not compress and the engine will not turn over at all. After you got the "Jeep" fired up, did you see any water coming out of the exhaust pipe? This is a real good indication that the cylinder had water in it.

03-19-2008, 04:41 PM	#15
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 7,155	well, if it was the battery, i doubt it would start after stalling out. did you check the voltage at the battery terminals?

03-19-2008, 05:43 PM	#16
crabtruck Senior Member Join Date: Jul 2007 Posts: 4,110	Poor connections from your battery can do that.

03-21-2008, 07:42 AM	#20
87c10slammer Banned Join Date: Mar 2008 Location: levittown pa Posts: 2,197	i think he mean hydro lock and it wouldnt have cranked at all. if it turned over easy i would try a new thermostat. if it is bad then youll have the same problem

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