I have a '98 Civic LX with approx. 115K miles- tons of stop and go city driving. When at low speeds or coasting, there is a metal rattling noise that comes from the front end. There is a definite loss of power that goes with it. Do I just need a tune-up or could it be cat. converter or something related?
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Nov 29, 2012 - Whenever I accelerate the car makes this rattling noise - it sounds like its coming ... When I stop accelerating (or only just slightly have my foot on the ... Try speeding up more gradually -- pretend there's a raw egg between ...
"Pinging" is the metallic rattling sound an engine can make when accelerating. ...environment in the form of nitrogen oxide (NOx) and raw, unburned hydrocarbons (HCs).... Daniel Dillon has twenty-two years of experience as a licensed Smog ...
It can be a number of issues if the noise is engine related but have the oil pressure checked with an external oil pressure gauge. Most mechanics will have them. I would also change the oil and oil filter immediately and ensure you ONLY use the correct oil as specified by the manufacturer for that engine. (Using an incorrect formulation or the wrong grade will cause engine issues).
I suspect the engine is losing oil pressure and oil flow at low RPM and you are getting metal to metal contact on the top end of the engine when this happens as the low pressure is producing a lack lubrication to the upper end of the engine. At higher RPM the oil pressure increases as does the oil flow and the noisy internals are getting sufficient lubrication again or at least enough to eliminate metal to metal contact and stop the rattling.
Been there done that with all front end noises on my Trailblazer. Took me 6 years to figure it out myself and had been into the dealer several times. If it's a rattle noise, like metal to metal, it's your sway bar end links, replace them with Moog brand ($37 each) as these are greasable unlike the stock ones. Boy if you live near Sacramento, I'll look at it for you. There are other noises that I can diagnose by hearing them. A squeaking noise is usually the hood stops and lock, grease them up. A crunching spring noise would be either be your upper or lower A-Arm bushings or your swaybar bushings.
The only real expensive thing here to replace out of all these is the lower A-arm bushings. They are not removable, must buy the whole bracket with the bushings installed...about $120 or less. The way to isolate the squeak is to spray some silicone lube on one bushing at a time.
Remove and raise upper hose at thermostat end and remove lower rad hose. Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily. Honda rads are cheap.....any restriction....replace rad.
Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose. Flush good.
Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.
Stop leak can plug everything.
Also.......not likely causing over heating....but ....at your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW! Water pump is optional at this mileage.