The Stupid Engine Questions Thread

[long_bed]

So I am trying to diagnose a slow starting issue with my 95 tbi 350 c1500. Battery is losing its charge overnight. Diagnosis I've done so far shows it might be a parasitic drain somewhere in the system. While checking wires, i noticed that the AC compressor is magnetized whent I touch a screwdriver to its housing with the truck and AC switched off. Is this normal? I'm feeling like the AC clutch could be a culprit.

 

[89GMCJOHN]

Took my heads off today and the #6 piston looks kinda odd and I'm just wondering how concerned I should be with it.....the head gasket was bad

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That is a steam cleaned piston lol....

 

[bigfutz]

So I am trying to diagnose a slow starting issue with my 95 tbi 350 c1500. Battery is losing its charge overnight. Diagnosis I've done so far shows it might be a parasitic drain somewhere in the system. While checking wires, i noticed that the AC compressor is magnetized whent I touch a screwdriver to its housing with the truck and AC switched off. Is this normal? I'm feeling like the AC clutch could be a culprit.

Check your glove box and visor light switches. That was killing mine.

 

[1997]

Check your glove box and visor light switches. That was killing mine.

Also check under hood light that comes on when you open the hood.
Thinking Mag clutch draw would be quite high, not parasitic.

 

[PlayingWithTBI]

A simple test - disconnect the clutch connector and see if your battery is dead in the morning.

 

[bigfutz]

Is it normal for my temperature gauge to fluctuate (slowly) as the t-stat opens and closes on a cold (25F) day, even while driving for 1/2 hr?

Time lapse video:

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And some thermal imagery. Note ambient temperature is about 25F, intake 187F, and upper radiator hose 119F.

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[McBroom]

Idk bout the fluctuation. But my opinion is that the thermostat is going out. Does the cab get warm?

The Blue Mule

 

[bigfutz]

Idk bout the fluctuation. But my opinion is that the thermostat is going out. Does the cab get warm?

The Blue Mule

Yes. But I’ll change a $5 part rather than risk it. Thanks!

 

[McBroom]

Yes. But I’ll change a $5 part rather than risk it. Thanks!

I didn't say to risk or chance anything. I jus said the thermostat is going out.
My apologies if I may have been misleading. I do agree a $5 part and a simple job to do is better than a blown headgasket or worse...

The Blue Mule

 

[Wilecoyote]

How do I find the right serpentine belt, tensioner and pulley for my truck? or what is the best combo set for the money?