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Car Forum / Toyota / Toyota Trucks / November 2006Running Engine With No Coolant
I have an 1986 pickup that I have drained the cooling system on .I'm going to be replacing head gasket. I need to move the truck in and out of garage. How long is a safe time to run engine. Average outside temp is 40 degrees. >I have an 1986 pickup that I have drained the cooling system on .I'm > going to be replacing head gasket. I need to move the truck in and out > of garage. How long is a safe time to run engine. Average outside temp > is 40 degrees. Around 1 min Id say. Cylinder temp gets pretty damn hot VERY quickly without coolant. Is it a drama to fill with clean water? I thought it would stop any coolant leaking into the oil while I was waiting to do the job. No water in oil or oil in water yet. I'm a rooky with head gaskets. Is draining the coolant helping anything or should I just put it back in? I can just push the truck in and out of course. > >I have an 1986 pickup that I have drained the cooling system on .I'm > > going to be replacing head gasket. I need to move the truck in and out [quoted text clipped - 3 lines] > Around 1 min Id say. Cylinder temp gets pretty damn hot VERY quickly without > coolant. Is it a drama to fill with clean water? You will be doing more damage with no coolant than full of plain water. If you dont have to put it in and out often just push it. Or finish the job at hand and getit running right. >I thought it would stop any coolant leaking into the oil while I was > waiting to do the job. No water in oil or oil in water yet. I'm a rooky [quoted text clipped - 8 lines] >> without >> coolant. Is it a drama to fill with clean water? Do you mean I would be doing more damage with no coolant and running the engine, or do you mean even if I don't run engine I should put the coolant back in? > You will be doing more damage with no coolant than full of plain water. > [quoted text clipped - 14 lines] > >> without > >> coolant. Is it a drama to fill with clean water? dont mean to be disrespectful here mate, but should you be taking on a head gasket if you cant get past this stage? | Do you mean I would be doing more damage with no coolant and running | the engine, or do you mean even if I don't run engine I should put the [quoted text clipped - 17 lines] | > >> without | > >> coolant. Is it a drama to fill with clean water? I'm just asking a simple question. Is it better to leave the coolant in or leave it out, until I'm ready to do head gasket. > dont mean to be disrespectful here mate, but should you be taking on a head > gasket if you cant get past this stage? [quoted text clipped - 24 lines] > | > >> without > | > >> coolant. Is it a drama to fill with clean water? Personally I would leave it in until you are sure that you wont be needing to move the truck again, and then attack it from there, and make sure you have a good manual on hand for all the other stuff. As Scotty said in his previous post, it doesn't take long to get hot in there. | I'm just asking a simple question. Is it better to leave the coolant in | or leave it out, until I'm ready to do head gasket. [quoted text clipped - 26 lines] | > | > >> without | > | > >> coolant. Is it a drama to fill with clean water? >I'm just asking a simple question. Is it better to leave the coolant in >or leave it out, until I'm ready to do head gasket. If you're pretty sure you have a blown head gasket your principal concern is to prevent getting any antifreeze/coolant in the engine oil - even small amounts of Ethylene Glycol from the coolant will do a number on the oil's lubricating qualities and the engine bearings get all chewed up. Now you need a whole rebuild. Drain the coolant. If you want to run the engine for more than about 10 seconds at a shot, I'd put plain water in the cooling system - running it dry is too much risk, some areas like the top of the cylinders get hot real fast. Leave the radiator cap off or loose (just at the first notch) so the cooling system can not pressurize and force any water into the oil. And restrict yourself to a few minutes for moving it in or out. If it's a little below freezing, drain the water after moving the car. You'll need to drain it at both the engine block drain cock and the radiator drain cock to get it all. And place a drop-light or other heat source inside the car on the passenger side floorboards to keep the heater core from freezing, because you can't drain them easily. If it's going to get seriously below freezing, until you can get it filled up with proper antifreeze/coolant mixture again the car needs to be kept above freezing in a heated garage, period. The leftover water will freeze somewhere, and can cause big problems. --<< Bruce >>-- > dont mean to be disrespectful here mate, but should you be taking on a > head > gasket if you cant get past this stage? I was thinking that one myself. | > dont mean to be disrespectful here mate, but should you be taking on a | > head | > gasket if you cant get past this stage? | | I was thinking that one myself. Yeah, it can get a bit "how ya goin" in there if you're not sure of things. > Do you mean I would be doing more damage with no coolant and running > the engine, or do you mean even if I don't run engine I should put the > coolant back in? Id either push it in and out or Just put the water back in to drive it. Do you mean I would be doing more damage with no coolant and running the engine, or do you mean even if I don't run engine I should put the coolant back in? > You will be doing more damage with no coolant than full of plain water. > [quoted text clipped - 14 lines] > >> without > >> coolant. Is it a drama to fill with clean water? With no coolant, even for a very short time, you risk warping/damaging the block and heads, and also running the water pump dry isn't a good thing either. > Do you mean I would be doing more damage with no coolant and running > the engine, or do you mean even if I don't run engine I should put the [quoted text clipped - 19 lines] >> >> without >> >> coolant. Is it a drama to fill with clean water? > I have an 1986 pickup that I have drained the cooling system on .I'm > going to be replacing head gasket. I need to move the truck in and out > of garage. How long is a safe time to run engine. Average outside temp > is 40 degrees. better off leaving the coolant in. You will get less rust on the internal parts if you keep the coolant in. If there is no mayonaise in your crank case then leave the coolant in. You will have to drain it to do the head gasket. I have done six 22R head gaskets this year. I have gotten quite good at it. Feel free to email me questions. Couple of minutes, max. You can move from inside the garage to the side yard without any trouble. This assumes you do not live in Windsor Castle ... >I have an 1986 pickup that I have drained the cooling system on .I'm > going to be replacing head gasket. I need to move the truck in and out > of garage. How long is a safe time to run engine. Average outside temp > is 40 degrees. I have to move truck around because I'm having the garage redone. New roof, wiring, drywall. Its only around 400 square feet so their is not alotof room for contractor to work. I plan on doing the head gasket when work is done, but am also doing some body work now and need it under cover. > Couple of minutes, max. You can move from inside the garage to the side yard > without any trouble. This assumes you do not live in Windsor Castle ... [quoted text clipped - 3 lines] > > of garage. How long is a safe time to run engine. Average outside temp > > is 40 degrees. Then you should fill it up with coolant until you are ready to begin work. I suppose you could fill it with water in this instance ... >I have to move truck around because I'm having the garage redone. New > roof, wiring, drywall. Its only around 400 square feet so their is not [quoted text clipped - 9 lines] >> > of garage. How long is a safe time to run engine. Average outside temp >> > is 40 degrees. Okay, you have me completely confused. IF you drained the coolant in preparatioon for immediate engine sevice, subsequently decided the vehicle is in the wrong location, then you can start the motor for a very short time simply to move from the garage to the driveway, or something like that. I'd suggest that keeping the motor running for two minutes or less would not pose any problems beyond those you already have. BUT, if you drained the motor planning on future service activity, then you should not have drained it yet. You can still move the vehicle, but you ought to go ahead and fill it up -- which makes your question moot (fill the motor before moving the car). It is an inherently bad idea to run a motor with no coolant in it, but as you ask, there is a time period where coolant or no, the engine won't be damaged. I'd suggest that the time is very short, measured by a couple hundred seconds at maximum. If the new location is one where you could reasonably push the car to get to, then I'd accept the notion that you could drive it there instead. But, if you can push it, I'd have to wonder why you wouldn't do that instead of risk further damage by driving it. You state that you are going to move the vehicle in and out of the garage, but I can't see that happening once the motor is taken apart. You are going to move the car before you take it apart, then it will not move again until it is back together again. It will move into or out of the garage, but not both. If you are going to be moving it several times before you begin repairs, then you should refill the coolant. >I have an 1986 pickup that I have drained the cooling system on .I'm > going to be replacing head gasket. I need to move the truck in and out > of garage. How long is a safe time to run engine. Average outside temp > is 40 degrees. Man fking pee on the danm truck and push the fkr around!!!... > Okay, you have me completely confused. > [quoted text clipped - 29 lines] > > of garage. How long is a safe time to run engine. Average outside temp > > is 40 degrees. |
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