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B18/20 timing gears.

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Old Aug 28th, 2017, 16:31   #11
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Old Aug 28th, 2017, 17:09   #12
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Old Aug 28th, 2017, 19:21   #13
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No, that'll fall off when you remove the bolt.
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Old Aug 29th, 2017, 01:51   #14
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Old Aug 29th, 2017, 09:56   #15
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Thinking about it, what would you think about the idea of blocking of the oil jet and packing the space with grease,also closing off any escape into the sump?That would ensure adequate lubrication at all times and help to quieten any whine from the gears. just a thought.
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Old Aug 29th, 2017, 12:05   #16
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arcturus;

"...blocking of the oil jet and packing the space with grease...(to)...ensure adequate lubrication at all times" I have to say the former is a BAAAAD idea, because the later is not assured...without a design which would prevent this, grease has a preference for displacing and moving away from the interfacing teeth, to where its left alone, and where it would certainly not be doing the necessary continuous lubing!
A constant low-volume feed from the oil system with return to the sump is a design which has proven itself in millions of miles (in one well-known case, one just one vehicle!!!)...I recommend against reengineering a motor which Volvo undoubtably spend many hours on the dyne developing...

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Old Aug 29th, 2017, 12:13   #17
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Not a thought worth considering. As long as it's not blocked, rare, it provides a constant flow of lubrication. You wouldn't remove the oil pump and pack your big ends and mains with grease and not use any oil would you. Not a serious suggestion of course.

Can't remember if you had the timing cover off during your engine work but a new timing case oil seal a good idea if you didn't. Although the timing case did come off not too long ago when you fitted the steel gears the removal of the case can break the sump gasket and that means sump off (engine out) to do the job right. Bottom line, if it's leak free and running well, best to leave it intact IMO.
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Old Sep 3rd, 2017, 06:49   #18
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Another note of caution: Make sure that the nozzle is directed such that the camshaft thrust bearing receives some lubrication. If it is not, the thrust bearing will eventually fail. I know from an unfortunate experience with multiple failures of the camshaft thrust bearing. It took me several tear-downs to recognize the obvious cause of the problem. A small twist of the nozzle to point it in the right direction, and the problem was solved.
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Old Sep 3rd, 2017, 09:00   #19
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Blocking off all oil supply and returns and packing the timing case with grease is likely to cause excessive heat, failed front seal and high pressures on the teeth addendums such they would ultimately fail.
The steel gears are not that noisy, certainly no louder than the tappets(unless you are too tight on the tappets). Strategically located oil jet will lessen any noise, open out the jet (SLIGHTLY) will help with the oiling. Opening out to far would affect oil pressure to mains and bjg ends as the oil jet is on the oil pump main rail outlet.
Cleaning the oil rails and jet will have the greatest gain but that needs to be part of a full strip down with the rear blanking plug removed so you can gun brush the rail.
So:
• no grease
• cleanliness
• good quality oil
• correctly positioned oil jet
• timing case sealed correctly

Should have no issues then but if you still hear the steel gears then perhaps fitting the OE fibre ones would help?
Russ
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