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Slight tick at idle in 4.6 Northstar


Dawgfan92

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I bought an 05 StS with the Northstar in June.The car has 90k on it.I have noticed when it is idling you can hear a slight tick in the engine but it goes away upon revving engine.Is this common with this engine with the VVT or is this something i should be concerned about.

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Welcome to caddyinfo

From under the hood?

Take a video of it post it to photobcket and link it here, it will help

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Pls remove mistake

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Lets wait for Bruce and Kevin to stop by.  Where is the noise coming from?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I will try to get a video tomm as im off work.Well when you take off that drivers side engine skirt or whatever that plastic cover is called it seems a tiny bit louder so i would guess coming from drivers side of engine.I have had lifter noise before and it dont really sound like that.

 

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Ok, VVT is on the passenger side.  Look at your waterpump belt and tensioner pulley.  The pulley can be worn out.

Take a 3/4 inch hose about 3 feet long, put one end to your ear and touch around the engine listening to where its coming from.  

Be careful not to get hurt

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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@KHE

Hi Kevin, what do you think about this noise.  He said the noise was coming from the drivers side.  I asked him to listen around with a hose  (the guru's trick) but have not heard back.  

I am not familiar with this engine yet.  Thx, I hope the crossover job is underway 

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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It sounded like the fuel injectors to me but I don't have any experience with that engine/application so I am reluctant to post/comment.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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@KHE

It doesnt sound abnormal to me.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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