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Feb 12, 2004 | 11:30 PM

johngerardi

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From: hudson florida

temp gauge

i have a 1990 ford ranger my temp gauge moves very slightly i grounded gauge to check it and it works i replaced thermostat and temp sending unit same problem i checked temp of engine and it is up to operating temp could there be a blockage causing this not to work i have used radiator stop leak in the past .the heat inside my truck gets fairly warm not overlly hot is there a way to flush my blockmaybe ?what could cause this ?i have no problems with any other gaugeson occacision it gets to almost the n on normal then drops back down not often though could it be radiator cap ive never changed it

please help

Feb 13, 2004 | 10:25 AM

87 XLT

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From: SoCal

Since you've allready done everythng that should have fixed this, this is a strange one. Are you sure there are no leaks in the cooling system? If the level is rising in the overflow bottle as the engine warms up & drops as it cools down, theres no leaks & I have no idea what this would be. As Ken mentioned you could try a reverse flush. I have a Prestone flush & fill T spliced into a heater hose. Every 2 years I hook up a garden hose & flush away.

Last edited by 87 XLT; Feb 13, 2004 at 10:44 AM.

Feb 13, 2004 | 10:26 AM

Ken00

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From: South Jersey

The stop leak could clog the passages. I would do a flush with the kits you can get at the parts store but also force some water into the sensor port when you have the system empty.

Feb 14, 2004 | 12:13 AM

johngerardi

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From: hudson florida

thanks ill give it a try and see if that worksill let you guys know if it works my mechanic said gauge could be out of calibration but i think block plugged is better cause especially since ive never really flushed system in 14 yrs!

Feb 14, 2004 | 12:29 AM

Lone_Ranger01

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From: St. Louis region

14 YRS! WOW! I can't imagine how much buildup you must have in your cooling system. Do a really really good flush. And take the drain plug all the way out so that the chunks of gunk can come out.

Feb 14, 2004 | 09:09 AM

johngerardi

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From: hudson florida

truck looks fabulous though seats have been covered since day i bought it new in 90no dents or scratches and new paint except for this truck sound

Feb 14, 2004 | 03:56 PM

Lone_Ranger01

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From: St. Louis region

I'd rather have a good running engine than clean seats. IMHO.

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Feb 15, 2004 | 12:18 AM

Lone_Ranger01

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From: St. Louis region

The plug on the bottom of your radiator. The plug is made so that you can just loosen it to drain the fluid, however when doing a flush its always a good idea to take it all the way out to let any sludge, buildup, or deposits drain out of the radiator.