Weird leak..

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

fr3ak5how

Junior Member
Joined
Nov 19, 2024
Posts
12
Reaction score
13
Location
Texas
First Name
Justin
Truck Year
1979
Truck Model
C15
Engine Size
6.0
The past few weeks I've noticed a weird thing happening. I'm getting a standing coolant leak at the pump where I put an ICT heater hose bypass on my pump.. So Thing is, it only leaks when the truck is off and cold, like not driven for the day. It's my daily so I'm only seeing a puddle on Saturday mornings when I'm off work. As a note My engine does hold water pressure for a very long time too, maybe contributing maybe not..I'm wondering if the pressed in heater hose barbs are starting to loosen inside the pump or let coolant past them. Any other ideas..not sure if this is a known thing. Its a 2012 camaro SS pump.
 

fast 99

Full Access Member
Joined
Dec 31, 2021
Posts
2,092
Reaction score
3,069
Location
Spokane, Washington
First Name
Brian
Truck Year
81,85
Truck Model
K20
Engine Size
350
Have seen coolant leaks that only occur when vehicle is cold, especially plastic tank radiators. Holding pressure for long periods shouldn't be a problem as long as it isn't excessively high.
 

fr3ak5how

Junior Member
Joined
Nov 19, 2024
Posts
12
Reaction score
13
Location
Texas
First Name
Justin
Truck Year
1979
Truck Model
C15
Engine Size
6.0
My radiator is an oem plastic tank style, pn from an 05 sierra HD . It's a big ass radiator, that leak is at the pump though. Thought it was the Thermostat housing..resealed it a couple weeks ago. Slow leak not stressing it too much but its annoying.
 

Forum statistics

Threads
44,426
Posts
957,661
Members
36,790
Latest member
fastkid118
Top