Cold start rattle ?

[s2dk]

Hello

I have noticed that my s2 engine rattles a bit when cold started I would describe it as chaim rattle But on our engine there is No tentioner on the chain ?
It a aby engine
The little valve in the block has been changed
Could it be skifter That runs out of Oil in the Night ?
Its not every time it cold start But Maybe 8/10 times

Thx

[hunker7]

Interested to hear what people say, I have the same problem on my AAN. Doesn't happen always though.

[quattro-nick]

probably a bad hydraulic valve tappet
enough oil on the engine? what type of oil do u use?
u can see when you start the engine that the noise disappears when your oil pressure gauge goes up.......
also when the timingbelt is too loose you can get a rattle if the belt comes against the cover

[vag_noob]

too thick oil can cause this

[squarebare]

My AAN did this when I bought it, changed the oil and filter twice within. 5k as the service history had missed a couple of services, rattle hasn't returned.

[s2dk]

Im running 5w40 Miller cfs nt
Oil is between Half and full
My thought was on lifters to
Timing belt should be tight enoungh its not that long a go it was changed and it dosent Sounds like a slapping belt

[s2dk]

I have changed Oil 4 times within 10000 km. And i have trues 10w50 5w40 in different brands

[s2dk]

And Allso a belladd oil cleaning stuff

[hunker7]

I run 5w40 Castrol. I get tappet noise every morning which is more like knocking but chain rattling noise only occasionally? It's there for about 5-10 seconds and then dissapears. I have also replaced the cam chain and it ain't loose or anything.

[s2dk]

I Will change the lifters But that Will be at the same time i split the engine ��

[quattro-nick]

i believe that or engine needs 10w40 half synthetic oil,i find 5w40 a bit thin

[hunker7]

i believe that or engine needs 10w40 half synthetic oil,i find 5w40 a bit thin

Interesting. I asked oilman and he suggested 5w40, might try 10w40 next time round.

[s2dk]

It did not change anything running a 10w50

[RichLV]

I have no side engine noises from mine at all since the rebuild. I'm on 5w40 8100 X-Cess Motul.

I know that chain can rattle if it has stretched too much. Tappet noise is very different from chain rattle. You should be able to make a distinction between those.

I'd get the cam cover off and check what's the play in the upper side of the chain between cams.

[mike74]

Could it be the plastic splash guard inside the cam cover (the bit you can just see inside oil filler) come loose and rattling against a cam?