1969 stingray water pump issues
Thread Starter
Cruising
Joined: Dec 2024
Posts: 10
Likes: 1
1969 stingray water pump issues
I am on my 2nd new water pump due to fracturing. Any ideas what is causing this. Thanks for you help in advance
1st time during acceleration 2nd time reving up motor due to being running ruff when cold
1st time during acceleration 2nd time reving up motor due to being running ruff when cold
Le Mans Master
Joined: Jan 2001
Posts: 6,742
Likes: 1,384
What part is fracturing? Sounds a little odd... second time. Show us some pictures of your setup and what is cracking.
Race Director
Joined: Nov 2006
Posts: 13,230
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Fracturing a water pump??? Seriously.
I've been running a rather hotted up C3 for 40 years plus. I'm on my 4th pump. That's about 12years per pump.
I've been running a rather hotted up C3 for 40 years plus. I'm on my 4th pump. That's about 12years per pump.
Safety Car
Joined: May 2001
Posts: 4,759
Likes: 1,647
From: Fairfax Virginia
I was not aware that you could even fracture a water pump. I would love to see pictures of the part.
Using a Serpentine belt got rid of the issues with belts making noises on my L71. The old brackets and pulleys were difficult to keep quiet when running the engine. Belt squealing is not one of my favorite sounds.
With a Serpentine belt the noises are GONE and I don't have to constantly check the power steering belt for tension and adjust it often.
Using a Serpentine belt got rid of the issues with belts making noises on my L71. The old brackets and pulleys were difficult to keep quiet when running the engine. Belt squealing is not one of my favorite sounds.
With a Serpentine belt the noises are GONE and I don't have to constantly check the power steering belt for tension and adjust it often.
Thread Starter
Cruising
Joined: Dec 2024
Posts: 10
Likes: 1
Potential issue mechanic advised
Reply from mechanic
It’s one of 3 things
Harmonic balancer
Clutch flywheel cracked or out of balance
Crankshaft installation balance issue
I don’t get it as well. It’s at the shop I asked him for a picture will post when I get it but he seems to think it’s related vibration ? Has anyone have ideas
It’s one of 3 things
Harmonic balancer
Clutch flywheel cracked or out of balance
Crankshaft installation balance issue
I don’t get it as well. It’s at the shop I asked him for a picture will post when I get it but he seems to think it’s related vibration ? Has anyone have ideas
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Race Director
Joined: May 2006
Posts: 18,735
Likes: 2,582
Reply from mechanic
It’s one of 3 things
Harmonic balancer
Clutch flywheel cracked or out of balance
Crankshaft installation balance issue
I don’t get it as well. It’s at the shop I asked him for a picture will post when I get it but he seems to think it’s related vibration ? Has anyone have ideas
It’s one of 3 things
Harmonic balancer
Clutch flywheel cracked or out of balance
Crankshaft installation balance issue
I don’t get it as well. It’s at the shop I asked him for a picture will post when I get it but he seems to think it’s related vibration ? Has anyone have ideas
How soon after install do they fail?
You didn't feel some vibration after the 2 pumps were installed?
The pump is connected to those items listed by a belt which flexes, so hard to believe the only symptom would be the pump.
Last edited by MelWff; Dec 13, 2024 at 10:47 AM.
Thread Starter
Cruising
Joined: Dec 2024
Posts: 10
Likes: 1
Mechanic installed them
no leaking of oil. Idling poorly at times, but I thought it was due to possible water in fuel cause I saw some in tank.
Just decent acceleration the first time then clunk noise then antifreeze. Second time poor idling reving up moderately clunk noise again and antifreeze on the ground with same result. Heavy duty water pumps installed
no leaking of oil. Idling poorly at times, but I thought it was due to possible water in fuel cause I saw some in tank.
Just decent acceleration the first time then clunk noise then antifreeze. Second time poor idling reving up moderately clunk noise again and antifreeze on the ground with same result. Heavy duty water pumps installed
Last edited by Pdonovan115; Dec 13, 2024 at 10:49 AM.
Race Director
Joined: May 2006
Posts: 18,735
Likes: 2,582
Mechanic installed them
no leaking of oil. Idling poorly at times, but I thought it was due to possible water in fuel cause I saw some in tank.
Just decent acceleration the first time then clunk noise then antifreeze. Second time poor idling reving up moderately clunk noise again and antifreeze on the ground with same result. Heavy duty water pumps installed
no leaking of oil. Idling poorly at times, but I thought it was due to possible water in fuel cause I saw some in tank.
Just decent acceleration the first time then clunk noise then antifreeze. Second time poor idling reving up moderately clunk noise again and antifreeze on the ground with same result. Heavy duty water pumps installed
No pictures of what is actually breaking on the pump?
You have used this shop for a long time or only for the water pumps?
Thread Starter
Cruising
Joined: Dec 2024
Posts: 10
Likes: 1
I was not aware that you could even fracture a water pump. I would love to see pictures of the part.
Using a Serpentine belt got rid of the issues with belts making noises on my L71. The old brackets and pulleys were difficult to keep quiet when running the engine. Belt squealing is not one of my favorite sounds.
With a Serpentine belt the noises are GONE and I don't have to constantly check the power steering belt for tension and adjust it often.
Using a Serpentine belt got rid of the issues with belts making noises on my L71. The old brackets and pulleys were difficult to keep quiet when running the engine. Belt squealing is not one of my favorite sounds.
With a Serpentine belt the noises are GONE and I don't have to constantly check the power steering belt for tension and adjust it often.
Thread Starter
Cruising
Joined: Dec 2024
Posts: 10
Likes: 1
Le Mans Master
Joined: Jan 2001
Posts: 6,742
Likes: 1,384
Get another fan, even a cheap one (for temporary use only)...... see how it runs with the new fan. if better then replace with a good quality fan....
OR just leave the fan off to see if it runs smoother..... don't run it to overheating...
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,137
Likes: 4,247
From: US-PNW
I'm not sure what's going on, but two things look concerning to me: #1, that doesn't appear like a fresh crack - looks kinda rusty, as does the rest of the pump; #2, the fan mounting shaft looks like it's extended pretty far from the nose of the pump (might just be my mistake or angle of the pic).
If the pump was rebuilt by someone who didn't know how to support the nose to press out and in the bearings, I could see that sort of fracture in the casting.
Where is your mechanic sourcing these pumps? I think you'd be better served by getting one yourself from a reputable source.
If the pump was rebuilt by someone who didn't know how to support the nose to press out and in the bearings, I could see that sort of fracture in the casting.
Where is your mechanic sourcing these pumps? I think you'd be better served by getting one yourself from a reputable source.