Does a knocking in the engine spell doom for the engine?

Jennifer Harber

Asked by Nov 04, 2015 at 05:36 PM

Question type: Maintenance & Repair

I have a 2004 GMC sierra 4 x4.  Had
a new jasper engine installed about 3
years ago, with less than 15000 miles
on the new engine.  Truck has been
sitting parked for the last two year
due to brake system issues, but was
started periodically.  It was last
started and ran fine 6 mos ago.  Had
oil changed and tried to start it today.  
There was a knocking on the right
side and the low oil pressure light
came on, so I shut it down.  Any

5 Answers


That sounds like a rod knock. Sorry but that is bad news.


Sorry but if it has 15,000 miles on it, it is not a "new" engine- what if it got driven on the Paris-Dakar Rally for 15,000 miles? anyway, maybe it's not so bad- just drive it, the knock might go away- it might just be a plugged oil galley or somethin' from sitting- maybe


The oil pressure dropping down is not a plugged oil galley. Isn't 15k the average life span of a japser engine? If Jennifer revs it up real good the rod going through the side of the engine will stop the knock once and for all.

Jennifer Harber

It is not driveable now. It would barely start and doesn't idle too well


All kidding aside it really does sound like you have a rod knock. I am sure the engine is no longer under warranty so you are probably stuck getting another engine or rebuilding the one you have. A factory crate engine from Chevy will be your best bet for a new engine and probably cheaper than a re-build.

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