hey after a long drive i noticed there was a little bit of what looks like dirt under my fuel cap
engine has just been put in and did sit for a while without head on
anything to worry about

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Cheers

I think its time to flush your tank out and ensure you have a fuel filter in the Line

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Stop Licking the Dog...I Don't Care Who Started It

Do you mean the oil filler cap or the fuel tank cap?

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

it does make a Dif True

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Stop Licking the Dog...I Don't Care Who Started It

yeah sorry guys i mean the rocker cover cap or where you put the oil into the engine
it doesnt seem to be doing it much if at all when i drive short distances around city but it was its first real run since engine was put in
1100 went on top of another 998 gearbox and the 1100 had been sitting without a head for a while maybe just a little dirt from that ????
or something to worry about
i was checking the cap to make sure there wasnt any creamy stuff and i noticed little bits of dirt (looked like dirt) and wiped then when i stopped again a little was there again

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Cheers

if you didnt clean everything properly, then i would guess it could be dirt.
if you cleaned everything before you put the engine together then perhaps its burnt oil mixing with oil to create a sludgey dirt like substance.
i dont know how this could happen... sump to pistons to valves to rocker cover?
or through the camshaft along the push rods to the head to the cover?

does the stuff have sand grains in it like normal dirt?

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Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

no sand just a black dirtish stuff not much of it but grainy enough to feel when you rub between your fingers

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Cheers

Sounds like sludge. Check you have enough breathers and they're not blocked, change oil, take it for a good long run.
I found Penrite HPR30 gave me a little bit in the neck, but Castrol Formula R 25W/50 doesn't.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

so if it is sludge which i think it could be from a bottle of stop smoke stuff i put in is it damaging

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Cheers

Maybe...?

For every litre of fuel burned 1.25L of water (vapour) is produced. Usually it goes out the exhaust, but.. if motor is old and worn you will have more blowby of fuel and water vapour past the rings- recipe for sludge.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

try some Methylated Spirits in your fuel tank Son....

Its in the boot Son.....Its the twist off cap below the windows!!!

Try about a litre to a tankfull.....

Metho displaces water from fuel Son......

give it a try......

Oh, and by the way, I think you need to try a few rapid oil changes with cheap oil just to clean out the gunge......Is your radiator water also oily?? Might be a valve guide or head gasket on the way out???

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"Show me the Mini!"

I think we are dam close now

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Stop Licking the Dog...I Don't Care Who Started It

hey doc what oil do you recomend ??
castrol formula r ??
makka

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