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#721836 - March 28th 2017 8:13 pm Gauge cluster acting funny  
Joined: Dec 2016
Posts: 41
Offgrid2 Offline
newbie
Offgrid2  Offline
newbie

Joined: Dec 2016
Posts: 41
East Tennessee
On my new to me g20 van, the temp gauge always reads cold. I replaced the coolant temp sensor near the thermostat. Is there a second sensor on the driver's side cylinder head?

Now I noticed the oil pressure reading low on coasting or acceleration but stabilizes in the middle at a steady speed. The engine feels perfectly OK

#721837 - March 28th 2017 8:28 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Jun 2010
Posts: 12,178
frscke1 Offline
frscke1  Offline


Joined: Jun 2010
Posts: 12,178
Van Diego California
There is another temp sensor.... its on the pass side. 1 for the coolant going into the block & 1 on the way out, comp reads them both. 2 different sensors 1 with a little brass butt & the other has a big brass butt.


Your oil gauge .... change your oil & filter. The oil is either sluggie or the oil filter is clogged.

#721870 - March 29th 2017 5:15 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Dec 2016
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Offgrid2 Offline
newbie
Offgrid2  Offline
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Joined: Dec 2016
Posts: 41
East Tennessee
Thanks, do you have a part no. for that sensor?

Also regarding the oil, I checked the dipstick, there was the initial residue, I cleaned it and inserted it in, pulled it out, and there is no oil registering.

I did an oil change 2000 miles ago, there are no oil leaks. No idea where the oil went.

#721877 - March 29th 2017 7:19 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Feb 2002
Posts: 378
Lionvan Offline
enthusiast
Lionvan  Offline
enthusiast

Joined: Feb 2002
Posts: 378
vanland Des Moines
I just went through this on my 90. The temp SENSOR is by the thermostat, it will affect your idle. The temp SENDER is the other one and is for your gauge. I had a fast and hunting idle and the sensor cured it.


[IMG]A foolish faith in authority is the worst enemy of truth. Question Authority.
#721882 - March 29th 2017 9:49 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Dec 2016
Posts: 41
Offgrid2 Offline
newbie
Offgrid2  Offline
newbie

Joined: Dec 2016
Posts: 41
East Tennessee
Ahh I see, thank you.

I managed to fill 2.5 quarts of oil to get back to the top of the hash marks. Correction to earlier, I did the oil change about 4000 miles ago, but it should not be burning oil. I watched the exhaust as I drove and I could not see any smoke.

#721885 - March 29th 2017 10:12 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Jun 2010
Posts: 12,178
frscke1 Offline
frscke1  Offline


Joined: Jun 2010
Posts: 12,178
Van Diego California
My 454's dont smoke either but I go thru 1 qt in a 1000 miles.

Low oil creates heat & the oil gets thinner & blows by the rings.

Might want to check your radiator fluid level.

The lower the oil the more heat, the more heat the faster the coolant evaps.


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
#721886 - March 29th 2017 10:22 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Dec 2016
Posts: 41
Offgrid2 Offline
newbie
Offgrid2  Offline
newbie

Joined: Dec 2016
Posts: 41
East Tennessee
Well everyone I top the coolant to the fill line on the expansion tank, not long after driving it the coolant will go down and rest at the top of the radiator and stays like that. I do not see any coolant leaks.

#721904 - March 30th 2017 2:03 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Jun 2010
Posts: 12,178
frscke1 Offline
frscke1  Offline


Joined: Jun 2010
Posts: 12,178
Van Diego California
Well being 2 1/2 qts low the extra heat evaporated it.

The only other thing I can think of is your heater core is leaking..


After you topped off the oil & coolant does it still want more coolant ? If so, with no other signof a leak I would say its your heater core.

Check the carpet under the dash on the passenger side. Is it wet or sticky ?

https://www.vanning.com/threads/ubbthreads.php/topics/721220/1


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
#721952 - March 31st 2017 11:44 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Dec 2016
Posts: 41
Offgrid2 Offline
newbie
Offgrid2  Offline
newbie

Joined: Dec 2016
Posts: 41
East Tennessee
The area below the heater core is dry. When I fill the coolant to the fill line on the expansion tank and drive around for a bit, the coolant drops to the top of the radiator.

The only place I have noticed a small amount of coolant was on the intake manifold.

#721974 - April 01st 2017 11:38 pm Re: Gauge cluster acting funny [Re: Offgrid2]  
Joined: Sep 2005
Posts: 8,012
CatFish Offline
carpal tunnel
CatFish  Offline
carpal tunnel

Joined: Sep 2005
Posts: 8,012
Georgia, USA
I had to replace the intake gaskets on our '94 because of an external coolant leak at the rear on the manifold. Didn't leak inside the engine but seeped coolant at the rear where it mated to the right hand cylinder head. When I removed the manifold the old gaskets were like powder and were completely disintegrated.

Last edited by CatFish; April 01st 2017 11:42 pm.
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