Odd temperature problem

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JTalley
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Odd temperature problem

Post by JTalley » Mon Sep 26, 2011 9:27 pm

My van heats up quickly, and the gauge usually stays right in the middle, leaning toward the high end. Lately, though, it's been fluctuating pretty bad (I can watch the gauge go up and down going down the road), and it seems to be running hotter than usual. I checked the coolant to find that it was really low. I filled it up the rest of the way with water, and the next day it was a bit low again. I just did an oil change, and found no water in the oil [-o< but I do have some on the front of the engine right where the hose from the radiator goes into the top. The coolant seems to be coming from just below where the hose mount bolts in. I think it might be leaking from there but drying up towards the top. Someone suggested that I replace my thermostat. This is really making me nervous here... Does anyone have any advice?

Btw, I'd have pics but my SD card reader stopped working and I can't get them off my phone right now. I'll have to transfer them to my other phone with USB connectivity and get them that way. Maybe tomorrow I can have them. I hope somebody can help me without pics, though.

Also, it has the regular green coolant in it. In my searching I found that yellow coolant apparently causes leaks.
Jake

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Ed- 1992 Astro, RWD, 4.3l V6 (purchased Feb. 2011)
FlowTech Red Hots glasspack exhaust (finally got it put on there!)
Old rides (earlier to later)
2004 Honda 250 Rebel (my dad's bike, he let me use it)
Neko- 1991 S10 Blazer, 4x4, 4-door (SOLD Feb. 2011)
Custom (aka failed) diy paint job- red with black stripe

LiftedAWDAstro
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How many wheels are on an Astro van? (4): 6
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Re: Odd temperature problem

Post by LiftedAWDAstro » Tue Sep 27, 2011 12:13 pm

Yup, sounds like you need to drain it down, pull the upper hose off, remove the thermostat housing and either replace the seal or hose or whatever is leaking. Might as well do the thermostat while you are there. Make sure you put antifreeze back in.
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy

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JTalley
I sleep in my van
Posts: 383
Joined: Sat Feb 26, 2011 7:56 pm
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How many wheels are on an Astro van? (4): 4
Location: Sulphur, Oklahoma

Re: Odd temperature problem

Post by JTalley » Tue Sep 27, 2011 2:03 pm

Any recommendations on the type of antifreeze?
Jake

Image
Ed- 1992 Astro, RWD, 4.3l V6 (purchased Feb. 2011)
FlowTech Red Hots glasspack exhaust (finally got it put on there!)
Old rides (earlier to later)
2004 Honda 250 Rebel (my dad's bike, he let me use it)
Neko- 1991 S10 Blazer, 4x4, 4-door (SOLD Feb. 2011)
Custom (aka failed) diy paint job- red with black stripe

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timelessbeing
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How many wheels are on an Astro van? (4): 4

Re: Odd temperature problem

Post by timelessbeing » Tue Sep 27, 2011 3:18 pm

Any green (ethylene glycol based) or universal coolant will do.

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