Re: 1989 318 overheating at idle
[Re: convx4]
#2585754
12/01/18 05:40 PM
12/01/18 05:40 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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An 89 318 is not a magnum engine.
When you say overheating how did you decide that? Does it puke coolant? Or is the dash gauge what you are going by? Or do you have another temp measure device you are using?
Overheating at slow or no vehicle speeds are usually airflow related. Fan clutch, wrong (CCW) fan, gunk in the condenser or radiator, or both. No shroud. Idle is when the engine is least stressed so it is not making as much heat.
I'd double check the cam timing because someone has been in there. Replace all the freeze plus because it one or two are weeping they all will be soon. Put it together, get it running check timing (retarded can cause overheating), look for vacuum leaks (lean can cause overheating) and see what you have.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: 1989 318 overheating at idle
[Re: convx4]
#2585789
12/01/18 07:14 PM
12/01/18 07:14 PM
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Joined: Feb 2005
Posts: 709 St Louis, MO 63026
convx4
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super stock
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St Louis, MO 63026
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Correct not a magnum, a LA roller. The over heating (Boiling over) is after I pull the truck out of the barn and let it idle.
I forgot to mention that this is a Shelby Dakota, it has two 11" electric pusher fans. They both work as should.
Timing is controlled by the computer. The distributor(thing) is set with an initial timing of 10 degrees.
The few times I have driven it the temp would creep up when at a stop.
Last edited by convx4; 12/01/18 07:21 PM.
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Re: 1989 318 overheating at idle
[Re: convx4]
#2585795
12/01/18 07:32 PM
12/01/18 07:32 PM
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Joined: Jan 2011
Posts: 15,713 Central Florida
larrymopar360
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Stud Muffin
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Central Florida
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Is there a catalytic converter on the truck still? If so have you checked to see if the exhaust is so clogged it's overheating the engine. I've known it to happen.
I'm assuming you have watched to see if clutch fan is operating properly, otherwise good suggestions from RapidRobert and SuperCuda.
Facts are stubborn things.
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Re: 1989 318 overheating at idle
[Re: convx4]
#2585809
12/01/18 08:06 PM
12/01/18 08:06 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Circle Track
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The over heating (Boiling over) is after I pull the truck out of the barn and let it idle. The few times I have driven it the temp would creep up when at a stop. At idle how many minutes till it is boiling? It kinda sounds like airflow except for the fact that it sounds like it is boiling over QUICKLY at idle (plus 10 initial ain't much) but I cant say if that is a problem or not. More just thinking out loud.
live every 24 hour block of time like it's your last day on earth
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Re: 1989 318 overheating at idle
[Re: convx4]
#2585819
12/01/18 08:51 PM
12/01/18 08:51 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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The 89 Shelby Dakota had no mech fan, too tight to fit. I would make sure the fans are blowing the correct direction. A piece of paper hung in front pof each one in turn will easily verify that. Temp creeping up at a stop tends to verify an airflow problem. I don't know how sensitive the Dak is to air dam presence, some vehicles will not properly cool if the air dam below the radiator support is missing.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: 1989 318 overheating at idle
[Re: convx4]
#2585855
12/01/18 10:19 PM
12/01/18 10:19 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Circle Track
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Lincoln Nebraska
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5- 10 minuets and it would over heat by boiling out of the overflow. 5-10M from dead cold? To me that sounds like something way more serious than (lack of) air flow.
live every 24 hour block of time like it's your last day on earth
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Re: 1989 318 overheating at idle
[Re: savoy64]
#2585859
12/01/18 10:28 PM
12/01/18 10:28 PM
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Joined: Feb 2005
Posts: 709 St Louis, MO 63026
convx4
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St Louis, MO 63026
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boiling out the overflow is a head gasket leak--or a cracked head----there is test for it... I was afraid of that.
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Re: 1989 318 overheating at idle
[Re: savoy64]
#2585860
12/01/18 10:29 PM
12/01/18 10:29 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Lincoln Nebraska
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^^^ that's what I was thinking. If there is an emissions testing stn closeby you could ask em to stick the probe in the air space below the coolant level & it'll register any hydrocarbons. Easier, I would get the O'reillys $3 fitting & pump it up to 10 psi and or the cheap psi gauge. EDIT meant to say above the coolant level!
Last edited by RapidRobert; 12/02/18 02:36 AM. Reason: missed something
live every 24 hour block of time like it's your last day on earth
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Re: 1989 318 overheating at idle
[Re: convx4]
#2585875
12/01/18 11:13 PM
12/01/18 11:13 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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Yeah, that quick a puke out the overflow isn't overheating, it's something else. A quick look at teh plugs might narrow down the cylinder.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: 1989 318 overheating at idle
[Re: convx4]
#2586109
12/02/18 02:05 PM
12/02/18 02:05 PM
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Joined: Jan 2011
Posts: 15,713 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
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I think today's plan is a good one. Good luck and keep us posted please.
Facts are stubborn things.
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