Mystery Engine Rattle

[Stockheim]

Hi people, love my 2014 MN Triton, only had it around 5 months, bought it in immaculate condition from a one owner with 63k on the clock. Last few weeks I have noticed every now and then on cold start ups, a strange rattling sound coming from the upper front area of the engine, it goes away in 5 or 10 minutes. Took it to a mechanic today, but alas the noise would not present itself? He said it could be injector knock!! that's a major worry! I will link a Youtube clip where the noise can be clearly heard. Love to hear any suggestions. Cheers

https://youtu.be/0iSUXgPC7sA

[JoanTheSpark]

have the services being done?
have you had the plastic cover off and checked all bolts/parts on the engine are tight when engine is cold?

[Stockheim]

Thanks mate, yep tried all those things. Service was done 4k ago, nothing unusual noted. Injector performance report was normal? Thought I had found the cause of the rattle when I removed the cover after the service and an 8mm bolt that is meant to hold a pipe bracket was sitting in a nearby well!! bingo!! I thought, put it back in, but alas rattle remained. Cheers

[JoanTheSpark]

Hm, I would run it and (without getting into belts/fanblades) hold/push on anything I could put my hands on to see if the rattling stops when I do this.
Did they adjust valve clearance on the last service? It would mean they had the manifold and top cover of the engine removed. Lot's of bolts.

[Stockheim]

No tappet adjustment happens next service. Might try your suggestion of applying pressure to bits while it's running though. Cheers

[NowForThe5th]

Is the noise related to engine rpm? In the video it sound a bit random but would be different when you're standing next to it.

[darreljourgenson]

Mate I hate to tell you but I had a similar noise in my 2011 Mn at 95,000 km, turned out to be am injector gone lean and ovaled a piston. Good news is youre probably still under warranty even as 2nd hand buyer, I got a complete new engine.

I'd say get it to a dealer asap

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[Stockheim]

Wow Darrel - that's heavy. Did you notice any other symptoms? So far Mitsubishi are only saying bring it in, leave it for a few days and they will investigate. Did your rattle go away when it warmed up a bit? mine does. Mine is also completely random, some mornings yes, some no. Cheers and thanks for any more info.

[darreljourgenson]

I never had any overheating or lights or loss of power or anything. Yeah it seemed kind of random when it was happening at first, but got worse and worse until I lost my nerve and pulled up to get it towed. Hope yours is something minor!

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[rodeddy]

]Was this issue actually resolved , as I'm having have rattle now when cold...
Cheers,Rod

[rodeddy]

I never had any overheating or lights or loss of power or anything. Yeah it seemed kind of random when it was happening at first, but got worse and worse until I lost my nerve and pulled up to get it towed. Hope yours is something minor!

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Was this issue actually resolved , as I'm having have rattle now ?
Cheers,Rod

[NowForThe5th]

I never had any overheating or lights or loss of power or anything. Yeah it seemed kind of random when it was happening at first, but got worse and worse until I lost my nerve and pulled up to get it towed. Hope yours is something minor!

Was this issue actually resolved , as I'm having have rattle now ?
Cheers,Rod

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