Oh and consider yourself told off for tipping diesel through your engine.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

shhhh don't call the engine police

I know, but hey its better then filling the engine with diesel and then running it for 5 mins then flushing it

Yes its a non turbo..

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Then the tensioner is slightly different from the turbo spring and ratchet affair. It is "all hydraulic" and needs to be pre-filled with clean engine oil if it gets removed.

Furthermore the oil pump is not driven by a chain. It runs off helical gears that are driven from the intermediate shaft (between timing device and IP). The helical gear drive affair is a "known" weak point for the non turbo OM617 and the OM616 because when the parts wear you can get a shuttling effect within (that I assume makes a light tapping noise).

If you can not see any evidence that the chain tensioner is not doing its job - so take off the valve cover and look(!) + check the feel of the chain and the big chain guide - I'd be pulling off the vacuum pump and checking the intermediate shaft play. Then removing the timing device - then checking the condition of the helical gears that drive the oil pump.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!