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1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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whitewolf
Novice
Mar 27, 2013, 7:40 PM
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1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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Hi guys, so my van started to overheat a bit and i popped the hood. the water pump was sprayen coolent everywhere. Also a bit of back story my 24x crankshaft sensor is not working right as my cooling fans are not working....yea just bought it too. So anyway im going to do the sensor water pump and thermastat. Anyone got some some advice on these jobs? havent done any of them bofore. its a 3.4l yea....thanks
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Hammer Time
Ultimate Carjunky
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Mar 28, 2013, 3:12 AM
Post #2 of 8
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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There isn't an easier water pump anywhere than the 3.1/3.4. It's about 5 minutes with a blindfold on. Diagnosing your fans could be a lot more tricky since this is a 2 speed system using 3 relays together. For the Crank sensor, you're going to need a puller to get the harmonic Balancer off. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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whitewolf
Novice
Mar 28, 2013, 8:36 PM
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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well while i am doing the rest of the work on the water pump and sensor i will replace the rad cap as well. i will change out the relays, and i guess i should test the fan motors as well.
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Hammer Time
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Mar 29, 2013, 3:10 AM
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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What makes you think that changing the relays is going to help anything? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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whitewolf
Novice
Mar 29, 2013, 12:13 PM
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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Well at this point, pulling the temp sensor plug does kick the fans on. Does that point to the coolent temp sensor needing replaced?
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Hammer Time
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Mar 29, 2013, 3:01 PM
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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No, it doesn't. It's supposed to do that. It merely indicates that the computer has control of high speed on the fans. I have my doubts that there is any problem with the fans. There fans aren't supposed to come on until around 226 degrees. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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whitewolf
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Mar 29, 2013, 3:04 PM
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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Well the temp guage depending on if i am at a stand still will go up to the 2nd line before the red, so its reading high for sure, i can also hear the overflow bubbling. so i would think that would make them turn on, no?
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Hammer Time
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Mar 29, 2013, 4:06 PM
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Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat
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As long as it doesn't go into the red, you do not have a problem. Just let it idle and watch what it does. Don't shut it off unless it goes into the red. See if the fans come on and cycle back off. Like i told you, it is designed to run hotter at idle. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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