Hey all. I had my cylinder head gasket replaced on my 05 Honda Civic EX at a Honda specific service center after my car began randomly overheating on the road to where eventually adding coolant wasn't even fixing anything.

The overheating has stopped so far, but I noticed a week after they did the work that there is a rattling sound what sounds like directly underneath my driver seat occasionally when I come to a stop at a traffic light or when I come to park.

It only occurs when I am just coming to a stop, so right before my car has come to a complete stop and after I stop the rattling noise tapers off after a second. It doesn't happen every time, either; maybe one in three or four stops so maybe 30 percent of the time.

I know they had to tear apart the engine to replace the cylinder head gasket, so I'm wondering with that knowledge in mind what it is that might be rattling as I didn't hear it before they went to work on my car.

Any ideas on this? Thanks for the help.

 

Most likely they left a muffler hanger loose,get under the car and grab the exhaust pipes and shake trying to duplicate the noise. If it is the exhaust tighten all connections.

 

Thanks for the input. I was trying to replicate it but no luck so I have an appointment to get it looked at by the same people so hopefully they'll get it sorted fast.

 

Hope they find it,nothing more bothersome than a rattle.

 

Just thought I'd update this before I forgot about it. I took it in and it turned out to just be the heat shield on the catalytic converter was loose so they just had to bind it up a bit and the rattling is pretty much gone now, free of charge.

I wish the same minimal issue on anyone else reading this. Thanks again for the help!