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oil leaking from exhaust
Posted: Sun Jul 01, 2007 7:50 am
by mcpartland
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
Posted: Sun Jul 01, 2007 11:07 am
by bmcecosse
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!!
oil
Posted: Sun Jul 01, 2007 3:56 pm
by Willie
Could also be sucking oil into the chambers through the valve stem oil seals.
Posted: Sun Jul 01, 2007 4:40 pm
by kennatt
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??
Posted: Sun Jul 01, 2007 6:14 pm
by bmcecosse
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.
po;
Posted: Mon Jul 02, 2007 9:03 am
by Willie
Oh really? i wonder why replacing them cured my oily manifolds then!
Posted: Mon Jul 02, 2007 6:03 pm
by bmcecosse
I reckon you were lucky!!
Posted: Mon Jul 02, 2007 9:10 pm
by Matt
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!!!
oil
Posted: Mon Jul 02, 2007 9:14 pm
by Willie
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.
Posted: Mon Jul 02, 2007 9:39 pm
by bmcecosse
Ah - now that's a real possibility for oil through the engine !