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randall729
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Name : randall r. beard
Age : 66
Location : upper peninsula of michigan (yooper)
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WATER PUMP Empty
PostSubject: WATER PUMP   WATER PUMP EmptyMon Nov 30, 2015 3:03 am

Can a water pump be bad if nothing leaks out of the water pump weep hole? Engine is overheating. Will the engine overheat if I remove the thermostat?
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Abaddon
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Abaddon

Name : Scott
Location : Macomb, Michigan
Joined : 2010-02-24
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Merit : 185

WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyMon Nov 30, 2015 8:31 am

Maybe the Thermostat is stuck shut and won't open causing the overheating.

Water pumps can go bad without leaking, yes. The impeller can break loose from the shaft, or I've even seen impellers physically wear out.

Start with the basics and check your Thermostat, coolant level, etc.
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LARRY70GS
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LARRY70GS

Name : Larry
Age : 63
Location : Oakland Gardens, NY
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WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyMon Nov 30, 2015 3:48 pm

As Scott said, yes.  The usual scenario though is, the pump shaft bearing goes and the shaft wobbles taking out the seal.  By then, they usually make noise also.  Grab a hold of the pulley and see if you can wobble the shaft.

What car is this?

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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AA
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AA

Name : Aaron
Age : 42
Location : C-bus, Ohio
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WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyMon Nov 30, 2015 6:41 pm

I would take out the thermostat, reconnect the housing and run the engine. It shouldn't even warm up to the half way mark. If that's the case, replace t-stat and problem solved. Look for one that's fail-safe (sticks open when it wears out).

If it still overheats, your problem is elsewhere. How's the coolant look? If not rusty, I'd suspect the water pump. Good luck.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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randall729
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Name : randall r. beard
Age : 66
Location : upper peninsula of michigan (yooper)
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WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyMon Nov 30, 2015 8:52 pm

To: Scott, thermostat was shut tight
To: Larry, the shaft does not wobble
To: Aaron, replaced t-stat, solved the over heating, retrn the first new t-stat wouldn't open until 212 instead 195, second new t-stat opened at 195 was the premium quality but worth the money. good to go.
Thanks all for helping me on this.
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deekster_caddy
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Name : Derek
Age : 47
Location : Reading, MA
Joined : 2007-01-31
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WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyTue Dec 01, 2015 4:13 pm

Larry, I'm pretty sure we are talking about an early 80's riv with the 307.

Randall, it would be really helpful to others if you enable the signature line in your Profile settings and include the year, model and engine (at minimum) in your signature.
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AA
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AA

Name : Aaron
Age : 42
Location : C-bus, Ohio
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WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyTue Dec 01, 2015 8:23 pm

randall wrote:
retrn the first new t-stat wouldn't open until 212 instead 195, second new t-stat opened at 195 was the premium quality but worth the money. good to go.

Funny, almost the same thing just happened to me. The Mr.Gasket 195 was opening at 180. The new JEGS 195 unit works fine so far (this was for LS2, not L67).

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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http://www.cardomain.com/ride/657082/4
randall729
Rookie


Name : randall r. beard
Age : 66
Location : upper peninsula of michigan (yooper)
Joined : 2015-10-01
Post Count : 13
Merit : 0

WATER PUMP Empty
PostSubject: Re: WATER PUMP   WATER PUMP EmptyTue Dec 01, 2015 10:19 pm

NAPA acted like I didn't know what I was talking about. I got a blank stare when I said to NAPA that I didn't think an engine antifreeze solution should be at boiling point to open up the 195 t-stat. I asked the NAPA person, "Yes? No? Do you agree?" No answer, but refunded my money and got me the premium t-stat, like I was giving them a problem for no reason. I thought NAPA would hire more knowledgeable employees at the counters. This has happened to me before with the cheap grade t-stats. Just because a part is new doesn't always mean it will work as new. there are defective new parts.
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