2016 - 2019 Cadillac CTS-V: Service Bulletin: #PIP5212C: Concern Of An Engine Thermostat Tick Noise And/Or Running Hot - (Mar 30, 2021)


#PIP5212C: Concern Of An Engine Thermostat Tick Noise And/Or Running Hot - (Mar 30, 2021)

Subject Concern Of An Engine Thermostat Tick Noise And/Or Running Hot

Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Cadillac

CTS-V

2016 - 2019

All

All

6.2L LT4

All

Cadillac

Escalade

2015-2020

All

All

6.2L L86

All

Cadillac

Escalade

2021

All

All

6.2L L87

All

Chevrolet

Camaro

2016-2021

All

All

6.2L LT1 LT4

All

Chevrolet

Corvette

2014 - 2019

All

All

6.2L LT1 LT4 LT5

All

Chevrolet

Corvette

2020 - 2021

All

All

6.2L LT2

All

Chevrolet

Silverado LD

2014-2019

All

All

4.3L LV3 5.3L L83 6.2L L86

All

Chevrolet

Silverado (New Model)

2019-2021

All

All

5.3L L82 L84 6.2L L87

All

Chevrolet

Suburban

2015-2020

All

All

5.3L L83

All

Chevrolet

Suburban

2021

All

All

5.3L L84 6.2L L87

All

Chevrolet

Tahoe

2015-2020

All

All

5.3L L83

All

Chevrolet

Tahoe

2021

All

All

5.3L L84 6.2L L87

All

GMC

Sierra Limited

2014-2019

All

All

4.3L LV3 5.3L L83 6.2L L86

All

GMC

Sierra (New Model)

2019-2021

All

All

5.3L L82 L84 6.2L L87

All

GMC

Yukon Models

2015-2019

All

All

5.3L L83 6.2L L86

All

GMC

Yukon Models

2021

All

All

5.3L L84 6.2L L84

All

Supersession Statement

This PI was superseded to update Model Years. Please discard PIP5212B.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Correction

A vehicle may have a concern of the engine running hot and/or has a tick noise from the thermostat.   

Recommendations / Instructions

Inspect the position of the head gasket locating tabs, to determine if the head gasket(s) has been possibly installed backwards.

Per the attached pictures, the head gasket locating tabs for both of the engine cylinder banks should be toward the front of the engine.

 

#PIP5212C: Concern Of An Engine Thermostat Tick Noise And/Or Running Hot - (Mar 30, 2021)
#PIP5212C: Concern Of An Engine Thermostat Tick Noise And/Or Running Hot - (Mar 30, 2021)

 


1. Bank 1 tab near cylinder 3

2. Bank 2 tab near cylinder 4

3. Is the front of the engine  

If the head gasket locating tabs are found to be closer to cylinders 5 or 6, this indicates the head gaskets were installed incorrectly restricting the engine coolant flow.

Replace the head gasket to repair for this concern. 

Note: GEN5+ engines (L82, L84, L87 all model years).

This noise can sound more like a scraping noise (similar to a failed bearing type noise)on these engines, generally the techs are hearing it from the water pump area and it goes away when the belt is removed.  Most likely the noise showed up after the heads had been recently removed (we haven’t seen any that were built that way from the factory).


Article ID: 60
Created: March 31, 2021
Last Updated: March 31, 2021

Online URL: https://www.cadillacvnet.com/knowledge-base/article/2016-2019-cadillac-cts-v-service-bulletin-pip5212c-concern-of-an-engine-thermostat-tick-noise-and-or-running-hot-mar-30-2021-60.html