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1997 Pontiac Transport waterpump/crankshaft sensor thermastat


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whitewolf
Novice

Mar 27, 2013, 7:40 PM

Post #1 of 8 (3054 views)
1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 28, 2013, 3:12 AM

Post #2 of 8 (3006 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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.



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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.



whitewolf
Novice

Mar 28, 2013, 8:36 PM

Post #3 of 8 (2985 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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.


Hammer Time
Ultimate Carjunky / Moderator
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Mar 29, 2013, 3:10 AM

Post #4 of 8 (2975 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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.



whitewolf
Novice

Mar 29, 2013, 12:13 PM

Post #5 of 8 (2962 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

Well at this point, pulling the temp sensor plug does kick the fans on. Does that point to the coolent temp sensor needing replaced?


Hammer Time
Ultimate Carjunky / Moderator
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Mar 29, 2013, 3:01 PM

Post #6 of 8 (2954 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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.



whitewolf
Novice

Mar 29, 2013, 3:04 PM

Post #7 of 8 (2950 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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?


Hammer Time
Ultimate Carjunky / Moderator
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Mar 29, 2013, 4:06 PM

Post #8 of 8 (2945 views)
Re: 1997 Pontiac Transport waterpump/crankshaft sensor thermastat Sign In

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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