Why is my car knocking?

Asked by Jan 06, 2016 at 07:06 AM about the 2004 Saturn ION

Question type: Maintenance & Repair

I drove my car yesterday and everything was fine. I
went to crank it this morning and at first it acted
like it did not to carnk and then when it did it was
making an awful knocking noise and after a
minute the check engine light started blinking.Its a  
2004 Saturn Ion 3.....any idea what it can be???

3 Answers

78,025

Any knocking sound is not good, it could be anything from jumped cam timing so a valve is hitting a piston to a thrown rod, do not run the engine or you will risk completely ruining it, have it towed to a shop you trust and get it checked out.

34,535

Check and see if there is any oil in the engine. I suspect you might have a rod knock but in any case do what tennis says and have it towed to a mechanic. Driving it will probably destroy the engine.

All my fluids are good including the oil.I checked all those this mornibg

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