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ticking sound

ticking sound

Postby elwood111 [OP] » Jul 23 2020, 11:41pm

Hey guys, I have my truck at the dealer. It's a 2015 with a 5.3. I've been slowly losing antifreeze and have a ticking sound from the motor. When I bought the truck I paid extra for a Century automotive warranty Only has a $100.00 deductible. Anyway dealer told me that the loss of antifreeze is a cracked seem on the radiator and they are replacing it in the morning. The ticking sound is most likely the injector pump, and they were going to have another tech confirm this. Is that right? My 2009 with a 5.3 and double the miles was quieter than this motor. Maybe this is common? Anyone heard of this or can verify that the ecotechs have a tick top them. This tick is always there, changes with rpm and I hear it best when it echos off a wall an the drivers side like at a drive-though.

Thanks in advance.
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Re: ticking sound

Postby GBSierraSLE » Jul 24 2020, 2:02am

The '14 and newer motors are direct injected. They are noisier than a non-direct injected motor.
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Re: ticking sound

Postby Kleiss1 » Jul 24 2020, 2:07am

My 2016 injection pump was very noisy.
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Re: ticking sound

Postby mbuenavides » Jul 24 2020, 3:30am

Same issue, but I got used to that noise as time goes by.
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Re: ticking sound

Postby CT2500HD » Jul 24 2020, 2:22pm

elwood111 wrote:Hey guys, I have my truck at the dealer. It's a 2015 with a 5.3. I've been slowly losing antifreeze
Thanks in advance.


Re: Losing antifreeze- if you're not getting a drip at idle, then possibly the water pump is leaking. They have a weep hole to prevent over-pressurization when they fail. You may want to add a UV additive to the coolant and check with a UV light (just a pen light) to find where the coolant is dripping. If its not dripping anywhere and you are losing substantial amounts, then its getting in a combustion chamber and going out the exhaust (head gasket). Could also be going in the engine oil, check for a grayish color to your engine oil, which would indicate emulsified water.
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Re: ticking sound

Postby Z15 » Jul 24 2020, 3:19pm

There is a known issue with the overcycling of the thermostat that leads to failure of the radiator. I had my replaced under warranty, new radiator, thermostat and associated parts.

Take a flashlight and look down the sides of radiator where tubes meet tanks, if leaking it will be stained and very visible. Heat will dissipate the leaking coolant so it may never be found on the ground. Mine just smelled of coolant and would loose a few ounces a month.

Subject: Coolant Smell and/or Slight Leak at Radiator
Models: 2015-2016 Cadillac Escalade Models
2014 Chevrolet Silverado 1500 (Plant Code G*) (without RPO NHT - Max Towing Pkg)
2014 Chevrolet Silverado 1500 (Plant Code F*, Z*)
2015-2016 Chevrolet Silverado, Suburban, Tahoe
2014 GMC Sierra (Plant Code G*) (without RPO NHT - Max Towing Pkg)
2014 GMC Sierra 1500 (Plant Code F*, Z*)
2015-2016 GMC Sierra, Sierra Denali, Yukon Models, Yukon Denali Models
Equipped with 4.3L, 5.3L or 6.2L Engine (RPOs LV1, LV3, L83 or L86)
2016 models: SOP to 15 Nov 2015
*For Build Plant Information See 11th Position of VIN
z
z
z
z
z
This condition may be the result of excessive thermocycles within the cooling system caused by excessive cycling of
the thermostat. These excessive thermocycles within the coolant system may cause the tubes to fatigue, crack and
leak at the radiator headers. To correct this condition, a new thermostat has been designed that eliminates the
thermostats excessive cycling.
If this condition is found, in addition to replacing the radiator, the engine coolant thermostat housing (w/thermostat)
must also be replaced. Refer to Engine Coolant Thermostat Housing Replacement in SI, which is located in the
Engine Heating and Cooling section.
Mike

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Re: ticking sound

Postby elwood111 [OP] » Jul 24 2020, 4:06pm

Thanks for the info guys
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Re: ticking sound

Postby elwood111 [OP] » Jul 25 2020, 1:06am

Z15 wrote:There is a known issue with the overcycling of the thermostat that leads to failure of the radiator. I had my replaced under warranty, new radiator, thermostat and associated parts.

Take a flashlight and look down the sides of radiator where tubes meet tanks, if leaking it will be stained and very visible. Heat will dissipate the leaking coolant so it may never be found on the ground. Mine just smelled of coolant and would loose a few ounces a month.

Subject: Coolant Smell and/or Slight Leak at Radiator
Models: 2015-2016 Cadillac Escalade Models
2014 Chevrolet Silverado 1500 (Plant Code G*) (without RPO NHT - Max Towing Pkg)
2014 Chevrolet Silverado 1500 (Plant Code F*, Z*)
2015-2016 Chevrolet Silverado, Suburban, Tahoe
2014 GMC Sierra (Plant Code G*) (without RPO NHT - Max Towing Pkg)
2014 GMC Sierra 1500 (Plant Code F*, Z*)
2015-2016 GMC Sierra, Sierra Denali, Yukon Models, Yukon Denali Models
Equipped with 4.3L, 5.3L or 6.2L Engine (RPOs LV1, LV3, L83 or L86)
2016 models: SOP to 15 Nov 2015
*For Build Plant Information See 11th Position of VIN
z
z
z
z
z
This condition may be the result of excessive thermocycles within the cooling system caused by excessive cycling of
the thermostat. These excessive thermocycles within the coolant system may cause the tubes to fatigue, crack and
leak at the radiator headers. To correct this condition, a new thermostat has been designed that eliminates the
thermostats excessive cycling.
If this condition is found, in addition to replacing the radiator, the engine coolant thermostat housing (w/thermostat)
must also be replaced. Refer to Engine Coolant Thermostat Housing Replacement in SI, which is located in the
Engine Heating and Cooling section.


Thanks Mike They knew nothing about the service bulletin. I found the bulletin link and sent it to the service writer.
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Re: ticking sound

Postby elwood111 [OP] » Jul 28 2020, 12:02am

They are also replacing the Thermostat per the service bulletin.
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