oil leaking from exhaust

Post by **mcpartland** » Sun Jul 01, 2007 7:50 am

In the middle of renovating a morris minor with 1098 engine, (dont know history of engine) i have had the engine runing for short periods, but yesterday I left it running for 15 mins, I spotted a pool of oil on the right hand side of the engie and thought it might be coming from the tappet cover gasket. I took of the inlet exhaust manifold and exaust maniforld only to see oilin the number three and four exhaust ports, the engine is showing no breathing problems (smoke from the breather cap) but I did see a lot of smoke comming from the Exhaust)
any advice welcome

Post by **bmcecosse** » Sun Jul 01, 2007 11:07 am

Sounds like ring problems with oil being pumped up into the bore - what do the spark plugs look like ? But maybe it's just lack of use - really need to take it for a more extended run to see if it all settles down...... Fingers crossed!!

Post by **Willie** » Sun Jul 01, 2007 3:56 pm

Could also be sucking oil into the chambers through the valve stem oil seals.

Post by **kennatt** » Sun Jul 01, 2007 4:40 pm

are you sure the oil was allready in the exhaust manifold before you took it off.Would have thought that any oil getting in there would be burnt off and blown out of the exhaust while the engine was running .And how would the oil get out of the exhaust and form a pool on the floor below the engine. Is it possible that you have a leaking rocker cover gasket,and the oil has entered the manifold when you have loosened the bolts without you seeing it. Have a good look at the rocker cover gasket before starting to pull the engine to bits,You may be lucky,if not ,then there is a serious problem somewhere.Possible cracked head??

Post by **bmcecosse** » Sun Jul 01, 2007 6:14 pm

It's never the valve stem oil seals!! Everyone grasps at that straw - but it has very little effect. Just a little puff of blue at start-up.

Post by **Willie** » Mon Jul 02, 2007 9:03 am

Oh really? i wonder why replacing them cured my oily manifolds then!

Post by **bmcecosse** » Mon Jul 02, 2007 6:03 pm

I reckon you were lucky!!

Post by **Matt** » Mon Jul 02, 2007 9:10 pm

Heres a thought... another symptom of a really worn engine though

Before me rebuild the breathers were plumbed in oil was being sucked through the carb and was pooling in the inlet manifold!!! Was extremely smokey though!!!

Post by **Willie** » Mon Jul 02, 2007 9:14 pm

Macpartland...another thought, if your 1098 is the sort with a mushroom
shaped breather assembly which is mounted in the inlet manifold then you can get terrible oil problems if the diaphragm which is inside has developed a split. Hope yours isn't that type.

Post by **bmcecosse** » Mon Jul 02, 2007 9:39 pm

Ah - now that's a real possibility for oil through the engine !

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