2002 Cadillac Seville SLS Q&A

2002 Cadillac Seville SLS Question: My 2002 cadillac sls has a valve knocking sound when the engine is cold.

What is causing this. It has 61,000 miles and quite s down when it warms up -
Answer 1
poss dirty inside of engine. rec doing an oil cleaning service to start with. that is the cheapest thing to start with. have you had regular oil changes? -
Answer 2
Any noise could mean lots of things not always serious but it should be checked as soon as possible.....even minor things can become serious if put off. -