Noisy top end 325i

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chatstar123
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Sun May 19, 2019 7:17 pm

I've removed the head on my 89 325i and refitted after refurb. The first time I drove it, all was good but today I went up the road and it started making a load tappet noise as if no oil was getting to the top end. I checked all valve clearances when the head went back together.

Any common problems or mistakes that could cause this. How is oil distributed to the top of the engine?

Any ideas/thoughts much appreciated.
Cloggy Saint
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Sun May 19, 2019 7:20 pm

There is a 'spray bar' that runs the length of the head. Basically a thin pipe with perforations to allow oil to be sprayed from above. It's not uncommon for the holes to get blocked over time. Remove the bar and soak it in petrol for a while and it may quieten things down.
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chatstar123
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Sun May 19, 2019 7:37 pm

Thanks. I'll have a look at this when I get a chance.
steve_k
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Sun May 19, 2019 7:47 pm

Cloggy Saint wrote:
Sun May 19, 2019 7:20 pm
There is a 'spray bar' that runs the length of the head. Basically a thin pipe with perforations to allow oil to be sprayed from above. It's not uncommon for the holes to get blocked over time. Remove the bar and soak it in petrol for a while and it may quieten things down.
do this then afterwards block one end & use compressed air to blow out the little spray holes, then refit.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
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