2005 Cadillac SRX Engine Tick - Cadillac Forum - Enthusiast forums for Cadillac Owners


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Old 04-06-2017, 02:29 PM
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Cool 2005 Cadillac SRX Engine Tick

Recently, the SRX ran low on oil (but no Oil Pressure light). First and only time. I now have a constant tick in the engine. At first I thought it was a rod knock, but it doesn't have the symptoms, i.e. no rough idle, no change of sound on acceleration or deceleration, and not very loud. As best as I can determine 1)it's not top end noise, 2) can't be heard from inside the car, 3) it does get a bit louder after the engine heats up, 4) the engine runs fine, 5) 1 for 1 with engine speed, and 6) tick across the rpm range. Engine info: 4.6L Northstar, 133K miles, Oil recent change and added GB MOA with some change noted.

Any suggestions before a motor replacement?
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Old 04-06-2017, 02:53 PM
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New Northstars are fairly pricey, I would be looking for a repair. How low was it and how did you know? You might have a Cadillac tech look at it and get an opinion.
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Old 04-06-2017, 05:37 PM
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I had it towed to Cadillac dealer In Denver when it went into limp home mode but no code was thrown. The said "oil was low" so I don't really know. Then took it too the Cadillac Dealer in my home town and they said replace the engine for $11K (probably what the car is worth). The only help we got from the Dealer mechanic was his statement that "there's a noise" in the engine. Well tada that's why I took the car in.

I'm leaning towards pins more than rod bearing. Either way I have to pull the engine.

The only other clue I have is it only sounds like one rod or pin. Again, too me this is a tick not a knock. It runs fine just the tick.
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Old 04-07-2017, 06:23 PM
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Ok then. How many miles since oil change? If it been over 500 miles you could change oil filter only, cut filter open and check for debris. If it's a bearing there should be material in filter pleats. It could be carbon which can cause a tapping noise. Decarboning could help. Does putting it gear change anything? If you take belt loose does noise change?
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Old 04-07-2017, 07:04 PM
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I'll pull the belt this weekend and get back on noise change.
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Old 04-08-2017, 06:49 PM
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Default Duh

OK - I'm embarrassed. So the Caddy threw a code for misfire. So replaced all the plugs and - yup - the tick went away. I hear a little valve noise after it gets warm but generally what you would expect. 40 years of working on cars and this one just threw me a curve ball. Sorry for taking up the thread.
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Old 04-10-2017, 01:56 PM
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it's fixed and did not require a new engine, lol
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