Jiggle pins, more T- stat opinions

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Jiggle pins, more T- stat opinions

Postby spencerdiesel » Sun Sep 03, 2017 9:26 am

I apologize in advance for this being hashed out on other threads. I'm usually pretty good about re-visiting older threads for repeat questions, but here goes again:

I've heard a lot of guys say the genuine Cummins stat is the only one to consider. On other cummins forums, looks like a lot of folks have had temp swing issues with the cummins stat.

Being that the Cummins unit has 2 jiggle pins and they have to be lined up in a certain manner, is it possible that most people having problems with them are just not lining the jiggle pins up correctly?

My temp needle is starting to swing after full operating temp is achieved, and I assume I'll be needing a new stat.

Semi related, whats ya'lls vote on coolant for these engines? Extended life recommended or no? SCA additive or no?

Thanks everyone
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing to the head/ >1/4”
Muffler delete

Minimum 60% WMO full time since Sep. 2018
spencerdiesel
14mm rotor
 
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Re: Jiggle pins, more T- stat opinions

Postby spencerdiesel » Thu Sep 28, 2017 7:46 pm

Oi?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing to the head/ >1/4”
Muffler delete

Minimum 60% WMO full time since Sep. 2018
spencerdiesel
14mm rotor
 
Posts: 1067
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC

Re: Jiggle pins, more T- stat opinions

Postby BigPapa » Sat Sep 30, 2017 4:12 am

Temp swing is normal, not going to hurt a thing. There have been lots of attempts to stop it but I don't think anyone has stopped it completely. Personally, I say don't worry about it. Mine's been doing it for over 500K miles.
Scott

1998.5 QCSB RWD - has '95 12V from my totaled '95, Goerend 47RE, HE351CW, DDIII injectors, 181 DV's, #10 plate, tranny temp, boost, & pyro gauges
1992 D250 ECLB Auto - dyno'd 308/630, PDR pump & POD injectors, 16cm2 E/H, BDP built A518 w/dual coolers, D70 w/LS, EGR disc brakes, dual tranny temp A-pillar, boost, pyro, and tach dash pod
1993 D150 RCSB - Building a DD/Racer Toy
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Re: Jiggle pins, more T- stat opinions

Postby spencerdiesel » Sat Oct 07, 2017 1:12 pm

Thank you sir, 500k is good enough for me
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing to the head/ >1/4”
Muffler delete

Minimum 60% WMO full time since Sep. 2018
spencerdiesel
14mm rotor
 
Posts: 1067
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Jiggle pins, more T- stat opinions

Postby spencerdiesel » Tue Jan 02, 2018 6:41 pm

Does anyone have opinions on whether I should run Rotella ELC NF (nitrite free) or ELC ULTRA. I believe the ultra is also nitrite free.

What I don't know is; does it matter if I use HOAT or OAT? I think both of these coolants are OATs but I don't know that.

I changed coolant about 2.5 years ago but don't remember if it was fleetguard red or rotella red :? I know it's red :roll: Can they mix?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing to the head/ >1/4”
Muffler delete

Minimum 60% WMO full time since Sep. 2018
spencerdiesel
14mm rotor
 
Posts: 1067
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Jiggle pins, more T- stat opinions

Postby PToombs » Wed Jan 03, 2018 5:15 pm

You could always buy the "mixes with everything" coolant and go with it. ;)
IIRC HOAT and OAT are different and can't be mixed. What happened to good old plain green antifreeze?
pete

Just enough power to break everything behind the crankshaft.
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Re: Jiggle pins, more T- stat opinions

Postby spencerdiesel » Wed Jan 03, 2018 8:36 pm

I know very little (about a lot) about coolant so I did a little research and settled on an extended life coolant. Will any "red" coolant blend fine with any other red?

Do y'all think I should change it after 2.5 years?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing to the head/ >1/4”
Muffler delete

Minimum 60% WMO full time since Sep. 2018
spencerdiesel
14mm rotor
 
Posts: 1067
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Jiggle pins, more T- stat opinions

Postby PToombs » Thu Jan 04, 2018 6:18 pm

I haven't done any research on coolant, so I don't really know. If it's long life though it should be good for 4-5 years I thought.
pete

Just enough power to break everything behind the crankshaft.
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PToombs
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Re: Jiggle pins, more T- stat opinions

Postby spencerdiesel » Thu Jan 04, 2018 7:37 pm

I was only going to change it if I had the thermostat out, the other day it swung from one end of the gauge (exaggerated) to the other for about 20 mins driving to SC. It's never done that before. Once at full temp, the needle never moves unless I give it enough peddle
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing to the head/ >1/4”
Muffler delete

Minimum 60% WMO full time since Sep. 2018
spencerdiesel
14mm rotor
 
Posts: 1067
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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