When i start my 4.4i 2001 up in the morning it makes a knocking noise for about 3 seconds,sounds like the engine has no oil then goes away after like 3 seconds.
The X is in for a rocker gasket and service tomorrow,just wondering whether to ask them to check this out,or if someone can tell me what causes this as I'm sure they are gonna charge me for diagnostic work on top. my car has got 88,000miles i use only fully synthetic oil(5w-40 i think).

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