I have this 2008 Mitsubishi Lancer with a 2.0L and there is this clattering noise only on a cold start up. I’m thinking it’s a lack of oil to the top of the engine but I use the recommended oil Mobil 5W-20 full synthetic and I even poured a quart of Marvel Mystery oil but there is still the clattering noise. What causes this noise? Here’s the link to the video
So I found what was causing this issue. I decided to do a oil change and filter. I personally use Mobile 1 5w-20 full synthetic and Mobile 1 m110a filter. And when I pulled the old filter out and poked some holes in it to drain I saw little particles of what looks like some sludge. I got curious and cut the filter open and saw more of it. But after putting fresh oil and a filter, on cold start the ticking noise of what sounded like the valves, went almost away and is pretty much gone after like five seconds of the engine on. So it seems like the Mobil filter is really working for me and I saw nothing dirty with the old oil.
MM oil will just hide the sound, not fix the problem.
Your timing chain system (chain(s), tensioner(s) and guides are worn out. They need to be replaced before you destroy your engine.
The engine has been rebuilt and the original problem was the chain tat stretched and the intake valves bent but everything is new inside. Timing chain, tensioner, guides and all new gaskets and seals. The car right now runs perfectly fine and shows no symptoms of a worn chain.
Who rebuilt the engine? Did it come with a warranty? How many miles on the "rebuilt" engine. Maybe they used a really bargain basement timing chain kit. I have seen sometimes where the mechanic will install the tensioner (pressure fed) incorrectly by putting gasket sealant on the gasket and inadvertently blocking the oil feed hole to the tensioner.
I did It myself I used the ITM engine components brand. Also the sound sounds like it’s coming from the valve train not really the front where the timing chain is
Also everything was torqued properly and installed properly the way how the old came off
If this engine has adjustable valves, pull of the cover and check for any looseness and adjust them to spec.
Here's the actual video (you didn't post the link correctly)
https://www.youtube.com/watch?v=0JuKB5s-Cu0
The motor shakes quite a bit . It looks like worn out motor mounts.
First thing I would try is slipping off the serpentine belt and see if the noise goes away.
Ok I’ll try that
Well the groaning noise from one of the idler pulleys went away but the ticking noise on cold start is still there
I’m thinking it could be a lack of oil on the of the engine for just these few seconds because this engine is a DOHC but has no lifters or adjustable valves just a valve, springs, buckets and a camshaft