Author Topic: Another sludge trap warning  (Read 896 times)

Online Greybeard

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Another sludge trap warning
« on: 11.01. 2019 11:19 »
Facebook post. Triumph crank, showing the muck in an engine that was described by the previous owner as 'rebuilt'

Offline Topdad

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Re: Another sludge trap warning
« Reply #1 on: 11.01. 2019 11:50 »
always thought Triumphs were full of crap  *red* *whistle*
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Offline Klaus

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Re: Another sludge trap warning
« Reply #2 on: 11.01. 2019 12:46 »
`rebuild`means shiny, ping ,ping and most buyesr are blinded.


If you think, everything is under control, you are not fast enought.

Offline Swarfcut

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Re: Another sludge trap warning
« Reply #3 on: 11.01. 2019 13:52 »
 FAKE and STAGED....

   There is not room in a crank for that amount of detritus. Look closely and you will see the metallic golden brown of high quality rust.

 The sort that the sills/rocker panels are made of when the yearly test on your old car comes with bad news. You don't get flakes of rust in sludge.

  Quality sludge is much finer and  has a consistent look, not angular chunks.

 Its a crank, some sludge and an added  pile of unrelated rust.

 Swarfy.

Online Black Sheep

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Re: Another sludge trap warning
« Reply #4 on: 11.01. 2019 14:58 »
The worst sludge trap case I have seen had the oil still going through a wormhole to the drive side big end. I have never seen one blocked completely.   
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Online Greybeard

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Re: Another sludge trap warning
« Reply #5 on: 11.01. 2019 15:09 »
Here is another one of the same crank

Offline Servodyne

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Re: Another sludge trap warning
« Reply #6 on: 11.01. 2019 19:16 »
Hi there,
I looks like the crank is either a Sunbeam S7/8 or possible BSA Sunbeam/Triumph Tigeress scooter. Its owner must have been running it on lawnmower oil.
1957 BSA A10 Spitfire
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1971 BSA A70 Lightning
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Online lawnmowerman

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Re: Another sludge trap warning
« Reply #7 on: 11.01. 2019 23:10 »
Agree Servo. This is a shot of my Sunbeam S7/S8 crank showing the crap which came out. I agree that there is too much sludge shown in the first picture to fit inside the crank journals but mine were over half full and enough to starve the oil to the big ends and neccesitate a regrind and new shells.

Jim

1959 A10 SR
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1960 BMW R60
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1955 Ariel 500 VH
1951 Sunbeam S7DL
1960 Matchless G12 with Watsonian Monza
......and loads of lawnmowers

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Offline Colsbeeza

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Re: Another sludge trap warning
« Reply #8 on: 11.01. 2019 23:59 »
I remember when I had my A10 crank rebuilt by a very respected company, I had doubts about the sludge trap, so after they had balanced the crank I removed the plugs and they were about 70% blocked - took ages to get the crank clean. I dunno how the balance will be affected, but sofar great up to middle revs.
Col
Colsbeeza
Australia

Online Greybeard

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Re: Another sludge trap warning
« Reply #9 on: 12.01. 2019 16:00 »
I remember when I had my A10 crank rebuilt by a very respected company, I had doubts about the sludge trap, so after they had balanced the crank I removed the plugs and they were about 70% blocked - took ages to get the crank clean.
A very respected company? Not any more!

Offline nimrod650

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Re: Another sludge trap warning
« Reply #10 on: 12.01. 2019 17:43 »
my old fella from new always drained oil hot poured in 3 pints of parrafin let bike tick over for a few minutes drain and refill with oil did same with his car

Online ellis

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Re: Another sludge trap warning
« Reply #11 on: 12.01. 2019 19:43 »
The price of paraffin nowadays that would be an expensive oil change.   *eek*

ELLIS

Offline stev60

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Re: Another sludge trap warning
« Reply #12 on: 17.01. 2019 06:48 »
Everytime I look in this site I read about the horrors of the sludge trap, not knowing whats lurking in the bowels of my bike is starting to give me nightmares, so ive decided it, runs good, dosent burn oil , good compression, I just ride and enjoy it
 

Online Peter in Aus

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Re: Another sludge trap warning
« Reply #13 on: 17.01. 2019 07:07 »
Everytime I look in this site I read about the horrors of the sludge trap, not knowing whats lurking in the bowels of my bike is starting to give me nightmares, so ive decided it, runs good, dosent burn oil , good compression, I just ride and enjoy it

That the way to go *beer*

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58 A10  SA

Offline Swarfcut

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Re: Another sludge trap warning
« Reply #14 on: 17.01. 2019 08:25 »
Peter,  You can sleep easy.  OK, this is a known problem now, back in the day the bikes where not expected to survive to anything like the half century that some have achieved. But like Mark Twain said, some things were certain, like death and taxes, and sooner or later the bike will  require attention. It is inevitable with any internal combustion engine. However, it may not be at a time of your ownership.

  But when that time comes, a complete strip and a clean out make sense. In the meantime frequent oil changes are by far the most cost effective method of engine preservation for any engine. Oil changes are a whole lot cheaper than major mechanical attention.

   On all my vehicles over the years I have always changed the oil and filter at half the recommended service interval. The insides look as clean as the day they were made. How many are running round with valve gear, the bit you can see, covered with a black greasy oil  blocking tarry sludge?    Too many.   Long service intervals are specified by the marketing men and the sellers of replacement engines.

 No doubt the thread will change to views on the virtues of oil choices.... straight, detergent, multigrade and additives.

 Swarfy.