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 Post subject: Normal engine temp?
PostPosted: Thu Sep 22, 2022 2:13 pm 
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TBI Slant 6

Joined: Sat Jul 08, 2017 2:06 pm
Posts: 147
Location: NC
Car Model: 78’ dodge D100 slant six
My t-stat is 195. What is the normal temps for the truck? It’s a 78 d100. Right now it’s above 200


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 Post subject: Re: Normal engine temp?
PostPosted: Thu Sep 22, 2022 4:37 pm 
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Supercharged
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Joined: Wed Oct 12, 2005 9:00 pm
Posts: 2518
Location: kankakee IL
Car Model: 80 volare, 78 fury 2 dr, 85 D150
Sounds like you have something besides the stock gauge to tell that? How/where are you measuring this? How much over 200 is it? I put a new sending unit in mine, gauge was pegged as soon as I turned the key on before I started it, with the engine stone cold


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 Post subject: Re: Normal engine temp?
PostPosted: Thu Sep 22, 2022 5:16 pm 
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Board Sponsor & Contributor

Joined: Thu Oct 31, 2002 5:39 pm
Posts: 23933
Location: North America
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The thermostat sets the engine's minimum operating temperature, not its maximum. Read this.

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 Post subject: Re: Normal engine temp?
PostPosted: Thu Sep 22, 2022 6:45 pm 
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TBI Slant 6

Joined: Sat Jul 08, 2017 2:06 pm
Posts: 147
Location: NC
Car Model: 78’ dodge D100 slant six
Yes I put a aftermarket temp gauge in as well I have both now. I wanted to see if it was getting as hot as the original said it was and it’s not. The original gauge shows it runs hot, way to hot. But I don’t know how hot it’s really supposed to get before it’s a problem. Today it got to around 210 tops. I’ve done some more work to the engine lately and figure it was about time to update a few things and put some old things back on. Reinstalled the egr valve and fixed my dizzy vacuum lines. Now the timing is much better and doesn’t go beyond what I can see with my timing light like it used to. There’s still small issues but none that should contribute to a overheating engine.


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 Post subject: Re: Normal engine temp?
PostPosted: Thu Sep 22, 2022 6:48 pm 
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TBI Slant 6

Joined: Sat Jul 08, 2017 2:06 pm
Posts: 147
Location: NC
Car Model: 78’ dodge D100 slant six
SlantSixDan wrote:
The thermostat sets the engine's minimum operating temperature, not its maximum. Read this.


Good read and makes more sense now. Thanks Dan.


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 Post subject: Re: Normal engine temp?
PostPosted: Wed Sep 28, 2022 4:05 pm 
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Joined: Wed Nov 06, 2002 1:57 pm
Posts: 2142
Location: Everett, WA
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tattoosteve99 wrote:
Now the timing is much better and doesn’t go beyond what I can see with my timing light like it used to.


Just how far does your timing light read too. The timing tab is only marked to 10*. The timing should at least go to 30* static. Excessively retarding the timing can lead to overheating issues.


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 Post subject: Re: Normal engine temp?
PostPosted: Wed Sep 28, 2022 4:59 pm 
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Supercharged
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Joined: Wed Oct 12, 2005 9:00 pm
Posts: 2518
Location: kankakee IL
Car Model: 80 volare, 78 fury 2 dr, 85 D150
Yup. As I did to my most recent build, it started pretty readily where I had statically set it up on buildup, so I "ran with it" for the initial run in while I monitored oil pressure and temp, and listened for potential bad things. Until I felt the blast of hot air on my arm from the fan blowing thru the radiator and shut it down. Once cooledi restarted it and dug out the timing light.

I like my dial back timing light, with that as long as the damper is (correctly) marked and there is a"0" reference on the engine I can read timing directly off of the back of the timing light


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 Post subject: Re: Normal engine temp?
PostPosted: Thu Sep 29, 2022 6:18 am 
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Board Sponsor & Moderator
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 15785
Location: Blacksburg, VA
Car Model:
I typically run 195 tstat in my 225s. Less engine wear, better throttle response, usually. If I have a real hotrod motor, I'll run a 180 to protect against detonation. If you have a stock or moderately modified motor with a good cooling system, then I would run 195. This means the engine will settle in and run around 200-205 F.

Lou

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 Post subject: Re: Normal engine temp?
PostPosted: Wed Oct 05, 2022 1:14 pm 
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TBI Slant 6

Joined: Sat Jul 08, 2017 2:06 pm
Posts: 147
Location: NC
Car Model: 78’ dodge D100 slant six
kesteb wrote:
tattoosteve99 wrote:
Now the timing is much better and doesn’t go beyond what I can see with my timing light like it used to.


Just how far does your timing light read too. The timing tab is only marked to 10*. The timing should at least go to 30* static. Excessively retarding the timing can lead to overheating issues.


It’s just a standard timing light. Couldn’t read past where the tab was but it would go off the side. But all is well with that now after I added the egr back and reran the vac lines.


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