help with this POS - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jimmmie '79 Cheyenne · 05-24-2006, 04:12 PM

Got my temp guage working and noticed it's running hot now (little over 1/2 on the guage). It's also puke'n water out the filler with the cap off. It's got a new radiator, w pump, and t-stat (all less than 2 years). I removed the t-stat and the water flows as it should and the temp guage shows about a 1/4. Put back in a new t-stat, (180) after testing it to be sure it was good, and it started puke'n again. I don't think it would be the heads / gaskets or it would be puke'n with the t-stat out. I've read about burping the radiator. Think this is it ??? or is there something else my fried mind is missing. Yea, I am putting the t-stat right - that crossed my mind to. Oh...my ride is not really a pos, if it was I would not have kept it for 27 years...5 years longer than my 1st wife. One or the other had to go...know what I mean?

jimmmie '79 Cheyenne · 05-24-2006, 04:13 PM

Got my temp guage working and noticed it's running hot now (little over 1/2 on the guage). It's also puke'n water out the filler with the cap off. It's got a new radiator, w pump, and t-stat (all less than 2 years). I removed the t-stat and the water flows as it should and the temp guage shows about a 1/4. Put back in a new t-stat, (180) after testing it to be sure it was good, and it started puke'n again. I don't think it would be the heads / gaskets or it would be puke'n with the t-stat out. I've read about burping the radiator. Think this is it ??? or is there something else my fried mind is missing. Yea, I am putting the t-stat right - that crossed my mind to. Oh...my ride is not really a pos, if it was I would not have kept it for 27 years...5 years longer than my 1st wife. One or the other had to go...know what I mean?

piecesparts · 05-24-2006, 04:35 PM

Is the T/stat opening all of the way? Try putting another in.

Bishops Trucks · 05-24-2006, 05:19 PM

Air Bubble? You didn't by chance get a reverse flow waterpump did ya?

hotrodhomi · 05-24-2006, 05:50 PM

it should puke water when you take off the cap, its pressurizes as it heats up. THats what the overflow bottle is for. Are you sure you have a problem?

MidnightBlues · 05-24-2006, 07:42 PM

hotrodhomi is right. Leave the cap on. Also the perfect working temp for the engine is a little over 1/2 of the gauge (if the gauge is good).
So I think nothing's wrong with your engine.

Karl Hoh · 05-24-2006, 09:45 PM

Quote:

Originally Posted by MidnightBlues

hotrodhomi is right. Leave the cap on. Also the perfect working temp for the engine is a little over 1/2 of the gauge (if the gauge is good).
So I think nothing's wrong with your engine.

With everything correct, a 195 t-stat will run 200-205. On the coolant recovery system it will transfer coolant to the overflow bottle when it heats up. Then when it cools down it will suck coolant out of the bottle back into the rad. The rad must be completly full ( right up to the neck ) for this to work properly.

jimmmie '79 Cheyenne · 05-25-2006, 01:10 AM

Didn't work on it tonite...had to work on my POS computer which I just got back up. Probably wait for Sat. to get back on the truck. Starting it cold with the cap off - it starts puke'n as the needle approaches the 1/2 way mark. The level goes down about 4 inches or so and then pukes. this repeats over and over. The gauge in the past has always read just a little over the 1/4 mark, even when going up the mountains with the ac on (with a 195 stat). It does have a new sending unit now and a different gauge - maybe 1/2 will be the new norm for it. If I can get the radiator to quit puke'n and stay at a constant level I can check the temp with a meat thermometer. Wish me luck ...

MidnightBlues · 05-25-2006, 05:04 AM

The ONLY way to stop the puking is to stop the engine, Then you can measure the temp of the coolant. But you can also measure the radiator itself. Should be the same temp as the coolant.

Slonaker · 05-25-2006, 09:13 AM

Quote:

Originally Posted by jimmmie '79 Cheyenne

The gauge in the past has always read just a little over the 1/4 mark, even when going up the mountains with the ac on (with a 195 stat). It does have a new sending unit now and a different gauge - maybe 1/2 will be the new norm for it.

Are you sure you have the right gauge/sender combination? When I did my engine swap, I used a sending unit for an older ('79 in my '86) pickup because my old one didn't fit the block. It said I was overheating after just a couple of minutes of running. I got an adapter to make the old unit work on the new block, and now everything is fine.

Just a thought...

Slonaker

jimmmie '79 Cheyenne · 05-25-2006, 09:52 AM

Could be the sender...got it at napa and I've read that they carry two different ones, one for the idiot light and one for a gauge. I don't remember if they asked me if I had gauges or not. Before I discovered my gauge was bad I changed the sending unit. Still have it so I may stick it back in this weekend when I put the t-stat back in. Thanks for the reminder...later

jimmmie '79 Cheyenne · 05-25-2006, 01:45 PM

Reverse flow water pump ??? Never have heard of such a beast. Tell me about it

piecesparts · 05-25-2006, 05:11 PM

That is a water pump for a later model Chevy engine. This would be an engine that has the serpentine belts, rather than the V-belts like the 62 through87 trucks. On these motors the water pump and the fan rotates in the opposite direction as the ones on our older 350 motors, due to the belt going in the opposite direction.

05-24-2006, 04:12 PM	#1
jimmmie '79 Cheyenne Registered User Join Date: May 2006 Location: Clovis, CA Posts: 26	help with this POS Got my temp guage working and noticed it's running hot now (little over 1/2 on the guage). It's also puke'n water out the filler with the cap off. It's got a new radiator, w pump, and t-stat (all less than 2 years). I removed the t-stat and the water flows as it should and the temp guage shows about a 1/4. Put back in a new t-stat, (180) after testing it to be sure it was good, and it started puke'n again. I don't think it would be the heads / gaskets or it would be puke'n with the t-stat out. I've read about burping the radiator. Think this is it ??? or is there something else my fried mind is missing. Yea, I am putting the t-stat right - that crossed my mind to. Oh...my ride is not really a pos, if it was I would not have kept it for 27 years...5 years longer than my 1st wife. One or the other had to go...know what I mean?

05-24-2006, 04:13 PM	#2
jimmmie '79 Cheyenne Registered User Join Date: May 2006 Location: Clovis, CA Posts: 26	help with this POS Got my temp guage working and noticed it's running hot now (little over 1/2 on the guage). It's also puke'n water out the filler with the cap off. It's got a new radiator, w pump, and t-stat (all less than 2 years). I removed the t-stat and the water flows as it should and the temp guage shows about a 1/4. Put back in a new t-stat, (180) after testing it to be sure it was good, and it started puke'n again. I don't think it would be the heads / gaskets or it would be puke'n with the t-stat out. I've read about burping the radiator. Think this is it ??? or is there something else my fried mind is missing. Yea, I am putting the t-stat right - that crossed my mind to. Oh...my ride is not really a pos, if it was I would not have kept it for 27 years...5 years longer than my 1st wife. One or the other had to go...know what I mean?

05-24-2006, 04:35 PM	#3
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: help with this POS Is the T/stat opening all of the way? Try putting another in.

05-24-2006, 05:19 PM	#4
Bishops Trucks KEEP ON TRUCKIN' Join Date: Jun 2005 Location: Sterling, Va. Posts: 5,731	Re: help with this POS Air Bubble? You didn't by chance get a reverse flow waterpump did ya? __________________ JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10 Father/Son Project http://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER"

05-24-2006, 05:50 PM	#5
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	Re: help with this POS it should puke water when you take off the cap, its pressurizes as it heats up. THats what the overflow bottle is for. Are you sure you have a problem? __________________ '72 2wd blazer, bagged w/ watts link & EDC '72 C10 "Lowered Farm Truck" STOLEN 5-18-11 '66 impala ht

05-24-2006, 07:42 PM	#6
MidnightBlues Registered User Join Date: Oct 2002 Location: The Netherlands Posts: 118	Re: help with this POS hotrodhomi is right. Leave the cap on. Also the perfect working temp for the engine is a little over 1/2 of the gauge (if the gauge is good). So I think nothing's wrong with your engine. __________________ Andre 1984 C10 SWB, 350/700R4

05-25-2006, 01:10 AM	#8
jimmmie '79 Cheyenne Registered User Join Date: May 2006 Location: Clovis, CA Posts: 26	Re: help with this POS Didn't work on it tonite...had to work on my POS computer which I just got back up. Probably wait for Sat. to get back on the truck. Starting it cold with the cap off - it starts puke'n as the needle approaches the 1/2 way mark. The level goes down about 4 inches or so and then pukes. this repeats over and over. The gauge in the past has always read just a little over the 1/4 mark, even when going up the mountains with the ac on (with a 195 stat). It does have a new sending unit now and a different gauge - maybe 1/2 will be the new norm for it. If I can get the radiator to quit puke'n and stay at a constant level I can check the temp with a meat thermometer. Wish me luck ...

05-25-2006, 05:04 AM	#9
MidnightBlues Registered User Join Date: Oct 2002 Location: The Netherlands Posts: 118	Re: help with this POS The ONLY way to stop the puking is to stop the engine, Then you can measure the temp of the coolant. But you can also measure the radiator itself. Should be the same temp as the coolant. __________________ Andre 1984 C10 SWB, 350/700R4

05-25-2006, 09:52 AM	#11
jimmmie '79 Cheyenne Registered User Join Date: May 2006 Location: Clovis, CA Posts: 26	Re: help with this POS Could be the sender...got it at napa and I've read that they carry two different ones, one for the idiot light and one for a gauge. I don't remember if they asked me if I had gauges or not. Before I discovered my gauge was bad I changed the sending unit. Still have it so I may stick it back in this weekend when I put the t-stat back in. Thanks for the reminder...later

05-25-2006, 01:45 PM	#12
jimmmie '79 Cheyenne Registered User Join Date: May 2006 Location: Clovis, CA Posts: 26	Re: help with this POS Reverse flow water pump ??? Never have heard of such a beast. Tell me about it

05-25-2006, 05:11 PM	#13
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: help with this POS That is a water pump for a later model Chevy engine. This would be an engine that has the serpentine belts, rather than the V-belts like the 62 through87 trucks. On these motors the water pump and the fan rotates in the opposite direction as the ones on our older 350 motors, due to the belt going in the opposite direction.



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