What happened to Molyslip(r)

[ianat182]

A long time ago when engines were still sidevalve etc,I used to use Molybdenum Disulphide(Molyslip) in my engines-petrol that was,under the impression that it plated the bores and gears preventing wear and was a high anti-friction additive. I read then that a car after being treated with this additive drove many miles without oil in the sump without seizing the engine.As I remember it was also used in the wheel bearings. Is there a reason to not use in a marine environment, on a marine diesel engine/gearbox??


ianat182

 

[sarabande]

they still make all sorts of interesting compounds, including an anti-seize one which is supposed to work in areas of high salinity.

I guess you need the oil "enhancer" though ?

Worth giving them a call .

http://www.molyslip.co.uk/anti_sieze_compounds/

 

[ianat182]

What happened to molyslip

That was quick!! Worth reading the whole of their listing.
Yes the 2001E version is the oil version . Looks like it could be useful all round,also the greases are waterproof etc. A word of warning though, if you use it make sure the drain plug is really in tight, it is that good; also split pin/wirelocking nuts.
Thanks.

ianat182

 

[oldharry]

Be a bit careful about using molyslip or any friction modifier in a marine gearbox. Some mechanical boxes use friction plates for declutching, or friction bands for engaging reversing. The old classic Parsons gearbox for example used a friction band to engage a planetary gear reverse drive. Molyslip or similar causes the band to slip so that reverse does not engage properly. Certainly any box with a wet plate clutch will almost certainly need expensive repairs if treated this way.

 

[earlybird]

In the '60's, when I worked in the (British) motor industry, I was told by a lubrication research engineer that he had investigated the use of molyslip in car engines, and had not seen any evidence to support the claims made in the then widespread adverts. Re the "empty sump" claim, his view was that, with a low rated engine and careful driving, the remnants of a good oil, with high film strength, would allow that anyway, although he didn't recommend the experiment with a privately owned car.
Maybe he was wrong, but I was persuaded!!

 

[dukes4monny]

Reminds me of when I was an apprentice mechanic (fitter) many years ago, a Bardhal rep visited to demonstrate their friction reducing oil additives and free samples were a plenty..............the next morning half of the mechanics didn't turn up for work........they drove mini's which shared the engine and gearbox oil and gearbox synchro hubs require friction to work

 

[Bilgediver]

Be a bit careful about using molyslip or any friction modifier in a marine gearbox. Some mechanical boxes use friction plates for declutching, or friction bands for engaging reversing. The old classic Parsons gearbox for example used a friction band to engage a planetary gear reverse drive. Molyslip or similar causes the band to slip so that reverse does not engage properly. Certainly any box with a wet plate clutch will almost certainly need expensive repairs if treated this way.

This applies to most marine gearboxes where cup and cones are used. Moreover do not put it on studs and nuts where a torque measurement is being used as it will probably result in over torquing and stretching the stud.

 

[Twister_Ken]

Always thought with 'miracle' products, that if they actually worked, then one other of the mainstream oil companies would have incorporated them as a way of gaining competitive advantage. Bit like magnetic fuel conditioners - how is that supposed to work?

 

[DownWest]

Good comment about sump plugs. The car that ran for 30m after the sump plug fell out was, I think, a Land Rover. Somebody told me that the Moly was responsible for the plug loss.
A

 

[omega2]

I used it in a 1960's BMW 500CC motor bike, and siezed the engine. Not prepared to try it again. Although it might take the slack up on an old Ford

 

[Heckler]

Reminds me of when I was an apprentice mechanic (fitter) many years ago, a Bardhal rep visited to demonstrate their friction reducing oil additives and free samples were a plenty..............the next morning half of the mechanics didn't turn up for work........they drove mini's which shared the engine and gearbox oil and gearbox synchro hubs require friction to work

Hmmmm, a good story BUT syncros dont stop the box working, they just engage the gear being selected to spin it up to the same speed of the driven gear so that they engage without clashing. All my minis had shagged syncros anyway, they all wore out at a relatively low mileage due to the technology not being up to the engine oil in a gearbox idea. If the additive had affected the syncros, it would only have made the gears crunch when gear changing.
Sorry for putting the dampener on a good story!
Stu