Post Number: 228
|Posted on Thursday, 21 January, 2016 - 19:48: |
I have removed the transmission on my 1979 Shadow 2 and am in the middle of rebuilding it.
I noticed that a small puddle of oil was collecting under the car, right at the back of the engine.
On closer inspection it seems to come from the back of the crankshaft.
My engine still has the oil thrower system. I know there is kit to convert it to the later system with an oil seal. Unfortunatey this is quite expensive and doesn't fit into my budget at the moment.
I read that the oil thrower grooves fill with sludge and that it is the reason oil seeps past it. Is there a way to clean the oil thrower ?
Robert Noel Reddington
Post Number: 841
|Posted on Friday, 22 January, 2016 - 05:41: |
The oil thrower scroll only works when the engine is running. If the oil leak wasn't happening when the engine was running then it's working fine.
If the car is not level, that is the front much higher than than the rear of the car and the oil level on max then the oil will leak past the scroll.
The clearance between the scroll and crankcase is quite small. Poking it around is not a good idea. Suggest a bit of white spirit and a blow gun.
The modification is not simple to do. The lip seal won't work on the scroll and I believe a sleeve and drilling and tapping of the crankcase is required.
Scroll type seals are better than lip seals because they never wear out. The reason for lip seals is improved crankcase vacuum for emissions.
Post Number: 231
|Posted on Friday, 22 January, 2016 - 06:09: |
I'll leave it well alone then.
Post Number: 972
|Posted on Friday, 22 January, 2016 - 09:01: |
If you still have a leak when useing the car a check of the flame trap first for blockage if ok then run the engine oil level in the sump lower just below the high mark of the dip stick.
Robert Noel Reddington
Post Number: 842
|Posted on Wednesday, 27 January, 2016 - 05:46: |
The max oil level mark is as it says the max. Meaning that it's ok to run at between max and minimum. All wet sump engines are like this. Other wise one would have to top up the oil every 100 miles or so.
This engine is not oil tight. Only fix when the engine drops oil when parked.
I have had many engines with scroll seals such as some Rootes engines and they don't go wrong. Unless as in the Rootes engine the timing cover is incorrectly aligned. The crankshaft pulley was slightly smaller than the timing cover hole and required a special sleeve to align ( or tape around the pulley boss). The cover bolts then nipped up the sleeve removed ( or tape ) and the pulley refitted. These never leaked. The rear seal was a lip seal.
The scroll on the Shadow is not adjustable like the Rootes engine because the design and tolerances naturally align the clearance bang on the money.
The Rootes engine was 4 cylinder in line 1500 or 1750 cc and fitted to the Hillman Hunter. Arrow series of cars. The Hunter was also made in Iran for the Middle East market. Not a bad engine. The go faster version was called the Holbay. Twin side draught Webers and 100 BHP.
Posted From: 126.96.36.199
|Posted on Tuesday, 08 March, 2022 - 18:47: |
My Shadow 2 was making an utter mess on the driveway from the rear main oil seal. I bit the bullet and purchased the modified crank case cover and seal, had it fitted and now the oil leak has stopped.
(Message approved by david_gore)