W169 A class A1.6 petrol rattle on start up if left for 5 days or more

[pomm001]

Bit of an odd one,
my trusty A class, if left for more that 5 days, i.e. in the airport car park while on holiday, has 'death rattle' on initial start up, its only happens if left for 5 days or more, other than that the engine runs really well doesn’t use oil and good on fuel

It has regular oil changes every 5 k miles, using MB supplied oil and filter, the filter drain O rings changed every time. It sounds as if the filter has emptied itself, anyone else experienced this ?
My old W168 didn’t do it. I believe there is a one way valve in the filter housing, I'm thinking this might have a small leak ? can the housing be changed with the engine in situ

Many thanks

 

[grahamcol]

Why not change the oil filter in case it's defective?
Edit. I was thinking it was a canister type but if its a removable element type then you'd need to check any anti drain valve in the filter housing.

 

[DREAMER NO2]

You might need to look in to if the oil thats in the engine is good for the miles on your clock , if it is a high mile engine,then you might need better viscosity oil .[thicker]

 

[tpn]

Not familiar with these but don't they have a timing chain!

The tensioner may be faulty. Cold start up rattle is the Modus Operandi of failing chain tensioners.
Something in the back of my head says something about a seal in the tensioner getting hard and leaking the oil from the tensioner. I could be wrong but...

Hydraulic tappets will also lose oil pressure over time but I would imagine that they would be rattley in normal driving also.

Just a thought.

 

[ajlsl600]

Not familiar with these but don't they have a timing chain!

The tensioner may be faulty. Cold start up rattle is the Modus Operandi of failing chain tensioners.
Something in the back of my head says something about a seal in the tensioner getting hard and leaking the oil from the tensioner. I could be wrong but...

Hydraulic tappets will also lose oil pressure over time but I would imagine that they would be rattley in normal driving also.

Just a thought.

Yr spot on. O ring in tensioner drys up and over 4,5 days oil runs out. Initial start up fills it again.
If not sorted ASAP u will likely be walking soon . If chain breaks lots of straight bits likely no longer straight!!! Get a chain and tensioner in it. Its a bit of a fiddle as not much room but entirely DIY possible think there are a nu of utube video and Haynes do a half decent manual. Also info on" lofty, s home page"