Hi there my name is Brandon I am a mechanical n electronic engineering technician I am the man reg mechanics call when they cant fix something I don't think it is plugs it sounds like to me you have a lose lifter or lifter spring n hammer are jumping until they get oil I will bet you that you are right about it sir write me back and let me know! But you also could have slug I would try slug first get some marvel mystery oil and put it in the oil and gas it works best for slug in a motor!!! Its been a round since 1925 and its really bad stuff I will bet you thou its slug in your motor!! It makes since bc I think if it was lifter it would do it all the time and not just cold try that and write me back and let me know please
Hi there my name is Brandon I am a mechanical n electronic engineering technician I am the man reg mechanics call when they cant fix something I don't think it is plugs it sounds like to me you have a lose lifter or lifter spring n hammer are jumping until they get oil I will bet you that you are right about it sir write me back and let me know! But you also could have slug I would try slug first get some marvel mystery oil and put it in the oil and gas it works best for slug in a motor!!! Its been a round since 1925 and its really bad stuff I will bet you thou its slug in your motor!! It makes since bc I think if it was lifter it would do it all the time and not just cold try that and write me back and let me know please and also if the plugs and wires was cease misfire the light would stay on I don't think plugs are the problem
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Flashing check engine light is not a good sign. Things to check on your own would be plugs and wires. If you plugs are really far gone and you are not firing on all cylinder it will cause this to happen.
SOURCE: Noisy rattle in engine compartment of 2003 Impala on cold start.
Take a broom handle(with the broom removed) or long heavy dowel rod , start the engine when cold and place one end of handle to your ear and the other to different parts non-moving parts of the engine compartment,including the engine to narrow down the location of the noise.
SOURCE: Fully warmed up; blowing hot and cold; Suzuki XL-7
Its just a vent damper plate not operating, it's like a gate which controls the flow of air,,usually they are operated by vacuum, or cables.
Service center time, unless you are handy with your own repairs.
SOURCE: 2000 chevy malibu there is a tapping sound when i
Most likely its just your lifters clapping as they make contact, until the oil starts flowing good through them, then it goes away. My car has been doing that for a long time. Never had any problems. The rods are pushed up by the camshaft, the rods push down rocker arms which then open the valves. The rods are round at the tips and sit in lifters that pump oil through them up to the top of the engine and then out onto the valve springs. If your car has a lot of miles you may consider putting a thicker oil, something like 10w40.
SOURCE: Ticking/Tapping when car starts but goes away???
I had what sounds like the exact same problem. It was an exhaust leak from the left (driver's) side exhaust manifold. This engine has a history of the manifold bolts breaking and causing the exhaust leak. The engine is also used on some Dodge vehicles. It sounds like a tick and I almost mistook it for a bad lifter. I took it to the local Jeep dealer who confirmed the exhaust leak. I replaced the left manifold completely and replaced bolts/gaskets on both sides (left/right) and it fixed the problem. Be careful, as the dealer tried to gouge me on the price. You are looking in the ball park of $600 parts/labor. I got parts for $120 and it took the better part of a work day to do the job.
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