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Drill a new crankcase vent-hole. #111709
03/05/07 4:03 pm
03/05/07 4:03 pm
Joined: Sep 2005
Posts: 79
Norway
Hans Chr. Robertsen Offline OP
BritBike Forum
Hans Chr. Robertsen  Offline OP
BritBike Forum
Joined: Sep 2005
Posts: 79
Norway
I've splitted the crankcase and is thinking of drilling a new hole for ventilasion...
I've heard some place that it could be smart to do.

But where should I drill the hole?
Its a T110 '56 pre-unit.
Pics?


1954 Triumph Speedtwin Chopper T110
http://photobucket.com/albums/c141/Triumphchopper/
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Re: Drill a new crankcase vent-hole. #111710
03/08/07 10:45 pm
03/08/07 10:45 pm
Joined: Sep 2005
Posts: 79
Norway
Hans Chr. Robertsen Offline OP
BritBike Forum
Hans Chr. Robertsen  Offline OP
BritBike Forum
Joined: Sep 2005
Posts: 79
Norway
Nobody who knows? frown


1954 Triumph Speedtwin Chopper T110
http://photobucket.com/albums/c141/Triumphchopper/
Re: Drill a new crankcase vent-hole. #111711
03/09/07 2:02 am
03/09/07 2:02 am
Joined: Oct 2003
Posts: 11,140
North Georgia, USA
RF Whatley Online content
BritBike Forum member
RF Whatley  Online Content
BritBike Forum member
Joined: Oct 2003
Posts: 11,140
North Georgia, USA
Nobody who cares to go drilling holes in irreplaceable cases. bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
Re: Drill a new crankcase vent-hole. #111712
03/09/07 8:10 am
03/09/07 8:10 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
BritBike Forum member
Tiger  Offline
BritBike Forum member
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Extra crankcase ventilation is bull****, good pistons and rings and the std timed breather are fine.
Engine starts misting oil out rocker spindles and such you pull the top end off and fix the blowby problem.

RFW was being polite, Tiger agrees and shall bite his tongue.


1969 TR6R
7.62 x 51 is not a maths puzzle.
Re: Drill a new crankcase vent-hole. #111713
03/09/07 8:14 am
03/09/07 8:14 am
Joined: Sep 2005
Posts: 461
sunshine coast, queensland, au...
bonnie john Offline
BritBike Forum member
bonnie john  Offline
BritBike Forum member
Joined: Sep 2005
Posts: 461
sunshine coast, queensland, au...
if ya gotta drill, for gawds sake, do it in one of the rocker inspection caps

btw, the best cure for such impure thoughts is a swift blow to the dominant index finger and thumb using a normal carpenters hammer


SPEED KILLS
do not exceed 250mg ...
Re: Drill a new crankcase vent-hole. #111714
03/09/07 9:47 am
03/09/07 9:47 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
BritBike Forum member
Tiger  Offline
BritBike Forum member
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Which raises two important philisophical questions:

A] Is there such a thing as a normal Carpenter ?

B] WTF would a claw hammer be doing in a bike workshop ?

BTW Triumph engines do not hardly breathe crankcase compression through the rockerboxes, the oil drain holes through the cam follower blocks are pretty small.

Wherethefuggyabin BJ ? Did you sort that bastard who ripped off your doona and stuff ?


1969 TR6R
7.62 x 51 is not a maths puzzle.
Re: Drill a new crankcase vent-hole. #111715
03/10/07 3:24 am
03/10/07 3:24 am
Joined: Nov 2006
Posts: 274
The Valley of the Sun,Arizona,...
CommandoRoadster Offline
BritBike Forum member
CommandoRoadster  Offline
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Joined: Nov 2006
Posts: 274
The Valley of the Sun,Arizona,...
Quote:
Originally posted by Tiger:


B] WTF would a claw hammer be doing in a bike workshop ?


What? No Harley shops Down Under? beerchug
Cheers
Bruce

Re: Drill a new crankcase vent-hole. #111716
03/10/07 4:18 am
03/10/07 4:18 am
Joined: Jan 2002
Posts: 1,132
hamden, ct.
hacksaw Offline
BritBike Forum member
hacksaw  Offline
BritBike Forum member
Joined: Jan 2002
Posts: 1,132
hamden, ct.
>>>> WTF would a claw hammer be doing in a bike workshop

claw hammers are for nortons.

now a rip hammer (all carpenters hammers arent technicly claws) i have in my own harley tool boxes.

Re: Drill a new crankcase vent-hole. #111717
03/10/07 4:49 am
03/10/07 4:49 am
Joined: Oct 2006
Posts: 187
MA USA
coz Offline
BritBike Forum
coz  Offline
BritBike Forum
Joined: Oct 2006
Posts: 187
MA USA
Claw hammers are crucial for pulling nails from tires and getting that itch you cant reach.

Re: Drill a new crankcase vent-hole. #111718
03/10/07 6:16 am
03/10/07 6:16 am
Joined: Aug 2001
Posts: 3,348
Michigan, USA
BONZO R.I.P. Offline
In Remembrance
BONZO R.I.P.  Offline
In Remembrance
Joined: Aug 2001
Posts: 3,348
Michigan, USA
hansa , if you do a search on the various forums you will come across all sorts of info on vents . I have a pretty good idea of how to pproceed with a BSA unit twin , but I have no help for a pre unit triumph . It seems to be worth the effort if you intend to ride the thingthe way it was meant to be ridden, who knows , you might find thatthe timing cover is a sufficient place , that would keep the purists from whining ??? Let us know how this turns out , I have a slightly modified pre unit triumph myself that hasnt hd any extra venting done and I think it might be necessary if I ever getthat bike on the road .

FWIW-BONZO

Re: Drill a new crankcase vent-hole. #111719
03/10/07 6:16 am
03/10/07 6:16 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
BritBike Forum member
Tiger  Offline
BritBike Forum member
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Quote:
Originally posted by CommandoRoadster:
Quote:
Originally posted by Tiger:


B] WTF would a claw hammer be doing in a bike workshop ?


What? No Harley shops Down Under? beerchug
CheerBruce
Harley toolkit comprises a cold chisel and half a brick laugh


1969 TR6R
7.62 x 51 is not a maths puzzle.
Re: Drill a new crankcase vent-hole. #111720
03/10/07 6:19 am
03/10/07 6:19 am
Joined: Sep 2005
Posts: 461
sunshine coast, queensland, au...
bonnie john Offline
BritBike Forum member
bonnie john  Offline
BritBike Forum member
Joined: Sep 2005
Posts: 461
sunshine coast, queensland, au...
A...well, i always thought that Karen was pretty normal
B...a claw hammer is useful to remove those screws in the primary case that just turn around and around without comming out :p

btw, hiya richard, been mainly lurking, but back with a vengence now beerchug


Quote:
Originally posted by Tiger:
Which raises two important philisophical questions:

A] Is there such a thing as a normal Carpenter ?

B] WTF would a claw hammer be doing in a bike workshop ?

BTW Triumph engines do not hardly breathe crankcase compression through the rockerboxes, the oil drain holes through the cam follower blocks are pretty small.

Wherethefuggyabin BJ ? Did you sort that bastard who ripped off your doona and stuff ?


SPEED KILLS
do not exceed 250mg ...
Re: Drill a new crankcase vent-hole. #111721
03/10/07 2:47 pm
03/10/07 2:47 pm
Joined: Aug 2001
Posts: 7,026
scotland
triton thrasher Online content
BritBike Forum member
triton thrasher  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 7,026
scotland
If you plan do go anything like fast, standard breathing will make the engine leak oil.

The commonest place for an extra breather is high on the timing cover, near the rear. Proper engineers get an alloy stub welded on. Twits like me bodge a plumber's fitting on. Best be 7/8" bore at least. It should be directed straight up as far as there is room, before turning the hose to the rear or downwards. If too much oil comes out of the new breather, you'll have to invent some kind of trap.

If you are not using a dynamo, you can put a breather on the dynamo mounting hole.


Amateur Loctite enthusiast.
Re: Drill a new crankcase vent-hole. #111722
03/10/07 3:56 pm
03/10/07 3:56 pm
Joined: Dec 2005
Posts: 194
Trenton, ON
bzzrd2 Offline
BritBike Forum member
bzzrd2  Offline
BritBike Forum member
Joined: Dec 2005
Posts: 194
Trenton, ON
Quote:
Originally posted by Tiger:
Quote:
Originally posted by CommandoRoadster:
Quote:
Originally posted by Tiger:


B] WTF would a claw hammer be doing in a bike workshop ?


What? No Harley shops Down Under? beerchug
CheerBruce
Harley toolkit comprises a cold chisel and half a brick laugh
Awww, come on now guys Not much difference really between a Milwaukee Vibrator and a British Vibrator. One is just bigger than the other and we like the smaller of the two. wink


No usable genuine parts were used in the building of my chopper. Even the cases were busted on the primary side. I respect the purist community and use after market pieces on this project wherever possible.

Moderated by  John Healy 


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