vic/se Posted December 13, 2012 Share Posted December 13, 2012 It sounds like a diesel under load only Quote Link to comment Share on other sites More sharing options...
Suzam Posted December 13, 2012 Share Posted December 13, 2012 Can you provide specifics? Year, model, engine, etc. How long has it been doing this? What type of fuel? Same source for fuel if more than one tank? Any other types of repairs or maintenance done recently? Quote Link to comment Share on other sites More sharing options...
vic/se Posted December 13, 2012 Author Share Posted December 13, 2012 Can you provide specifics? Year, model, engine, etc. How long has it been doing this? What type of fuel? Same source for fuel if more than one tank? Any other types of repairs or maintenance done recently? Outback 03 2.5l 5sp I replaced ignition wires and plugs last week, and I get this rattling noise since 3 days Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted December 14, 2012 Share Posted December 14, 2012 Drain oil and check for glitter. How long does the oil pressure light stay on after starting? Quote Link to comment Share on other sites More sharing options...
idosubaru Posted December 14, 2012 Share Posted December 14, 2012 Did it do this before the plug change? If not then check for a loose spark plug. (though i'd expect a performance loss you didn't mention) It runs fine? How many miles? Is the sound a knocking metallic, dull, thumping, or? 1. timing tensioners can fail and have a lot of slop and flop under load and sound like engine knock. that is behind the upper drivers side of timing belt covers. remove the cover and you can see it physically move under load (like pulling the throttle by hand). 2. internal engine issues - like he said, check oil 3. remove accessory belts and crank engine for two minutes to rule out all pulleys, bearings, etc. Quote Link to comment Share on other sites More sharing options...
mikaleda Posted December 15, 2012 Share Posted December 15, 2012 Check and make sure it is not the heat shields on the exaust rattling my legacy rattles under load. First time I heard it I thought something came loose crawled under it and it was just the heat shield over the cat converter. Quote Link to comment Share on other sites More sharing options...
vic/se Posted December 15, 2012 Author Share Posted December 15, 2012 Did it do this before the plug change? If not then check for a loose spark plug. (though i'd expect a performance loss you didn't mention) It runs fine? How many miles? Is the sound a knocking metallic, dull, thumping, or? 1. timing tensioners can fail and have a lot of slop and flop under load and sound like engine knock. that is behind the upper drivers side of timing belt covers. remove the cover and you can see it physically move under load (like pulling the throttle by hand). 2. internal engine issues - like he said, check oil 3. remove accessory belts and crank engine for two minutes to rule out all pulleys, bearings, etc. I recheck the spark plugs and they all have a brownish color ....I do feel a very slight power loss. If I rev up engine up to 3000 or 4000 rpm it just sounds fine or when I release the gas on gear it sounds ok or on idle it's also ok. I will check timing belt like you say oil looks fine but I will change it soon Quote Link to comment Share on other sites More sharing options...
vic/se Posted December 15, 2012 Author Share Posted December 15, 2012 Check and make sure it is not the heat shields on the exaust rattling my legacy rattles under load. First time I heard it I thought something came loose crawled under it and it was just the heat shield over the cat converter. I had that problem too, but it was doing it too when you're coasting, and it does'not do it now that's why I rule out the shields and I have very few left Quote Link to comment Share on other sites More sharing options...
vic/se Posted December 15, 2012 Author Share Posted December 15, 2012 Drain oil and check for glitter. How long does the oil pressure light stay on after starting? Oil light goes off right after starting. I will drain the oil and have new 5/30 on it Quote Link to comment Share on other sites More sharing options...
vic/se Posted December 15, 2012 Author Share Posted December 15, 2012 Did it do this before the plug change? If not then check for a loose spark plug. (though i'd expect a performance loss you didn't mention) It runs fine? How many miles? Is the sound a knocking metallic, dull, thumping, or? 1. timing tensioners can fail and have a lot of slop and flop under load and sound like engine knock. that is behind the upper drivers side of timing belt covers. remove the cover and you can see it physically move under load (like pulling the throttle by hand). 2. internal engine issues - like he said, check oil 3. remove accessory belts and crank engine for two minutes to rule out all pulleys, bearings, etc. Before the plug change it was fine, even with 110 000 miles it runs fine with lots of power. and it run fine for 3 days after changing the plugs and I replace the ignition wires with NGK's Quote Link to comment Share on other sites More sharing options...
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