glow plug heater
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Senior User
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glow plug heater
working on making an inline oil heater for another car project i am making. i was thinking of either using one of the dipstick oil heaters, or preferably a glow plug. the dipstick i would have to modify to fit into what ui am making but if i went with a glow plug i could just screw it in. and if it ever breaks i could take it out and just punt another in. i know that glow plugs are supposed to be momentary and will burn out if left on. but i need somethign i can let run in direct contact with engien oil. arnt the glow plugs on the 6.9 24 volt? how long could it be on if i ran it on 12v? or put it on a small fuse so it doesnt get much amperage? i am putting this in front of an electric oil pump that will be circulating oil till the engine gets warm. not hot just not cold. i imagine being in direct contact with the oil will help kepp them from burnign up real fast and they are only going to be run when the engine is cold before i start it up. however i dont want them running so hot that i burn up all the oil going past them. so thoughts ideas comments?
Elder User
Joined: Mar 2004
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From: Klamath Falls OR
Thats why they make circulating block heaters (for your cooling system) There is more water then oil LOL. That means everything will be worm (not Hot or Not cold)! And 6.9 are 12V and 7.3 is 6V.
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well i have a electric pump i am putting in this thing to bring up the oil pressure before start up and for low pressure at idle. and instead of getign something else to move the coolant when its not on i thought i would put something in front of the electric oil pump. also this is not going on my truck its for a small custom car im building.
Mountain Pass
Joined: Feb 2006
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As an FYI. VW TDI diesel engine use a single normal glow plug in the coolant flow to help wam up the engine faster. The colder the coolant temp is the more frequent and longer duration the "on" cycles are. I have a 1997 Passat with a digital voltmeter and see it cycle on & off for the first 2-4 miles of my commute.
Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
The 6.9 glow plugs are 6 volts as well.
You could install a resistor in series with the glow plug to drop the current or uses an IC timing circuit to pulse the trip power to a relay.
The timing circuit used to activate the relay would probably be easier and cheaper to do.
You could install a resistor in series with the glow plug to drop the current or uses an IC timing circuit to pulse the trip power to a relay.
The timing circuit used to activate the relay would probably be easier and cheaper to do.
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i like the timer idea. 6 volt? well i might go for a 7.3 gp then. or how long might the 6.9 gp last on 6v? hwat should i put the duty cycle at? i imagine it would take a lot longer to burn out when they are imersed in oil. and as a note i had planned on using two. and if i can have them switching back and forth.
i ain't rite
Joined: Mar 2005
Posts: 65,564
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From: Marlboro Mental Hospital.
i have a pre-luber oil pump on my 88, and there is no heater in the lines. it is 20 years old, and i never had a problem with it other than needing a new set of reduction gears about 4 years ago. it works fine even at 10 below. slow yes, but it still pumps 30lb pressure before i startup.
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Junior User
Joined: Feb 2004
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From: Saint John, NB
I worked at a gas plant that used heaters like that. The problem is that they get really hot adn the oil "cokes" on the element and degrades the oil rapidly.
We switched to circulatig heaters and the issue went away.
Thats my .02
We switched to circulatig heaters and the issue went away.
Thats my .02
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i know they get hot enough to make the oil coke up i was thinking have them on a short duty cycle to keep them from getting hot enough to do that. or maby have it screw into a copper jacket with a short duty cycle. so the heat would have to seep threw the copper and maby keep it a more even heat.
i ain't rite
Joined: Mar 2005
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From: Marlboro Mental Hospital.
http://www.pre-luber.com/
the one i have is 20 years old now, and they no longer make it. but the newer ones are supposed to be even better.
the one i have is 20 years old now, and they no longer make it. but the newer ones are supposed to be even better.
