Pinhole leak in Cylinder Wall... Oh boy. - 600RR.net
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post #1 of 7 (permalink) Old 12-05-2017, 01:04 AM Thread Starter
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Pinhole leak in Cylinder Wall... Oh boy.

Hey guys, this is my first or I guess I should say second post on this forum. Unfortunately already needing some help… It looks like the owner of the bike did a sketchy JB Weld job and now the cylinder wall is leaking coolant when the bike is warmed up… What are my options? If any?
I’m very excited to be a part of this community… Hate to be starting off with bad news :(
I have included a couple of pictures of where the leak is... (Left side of engine)

The bike is a 2008 cbr600rr with 24k miles and i have had it for only a month now but I am deeply in love with the bike (her name is Cici ❤️)
Thank you in advance
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post #2 of 7 (permalink) Old 12-05-2017, 01:53 AM
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I can't see what the hell is going on from those pictures.

2003 Honda CBR600RR
- Renthal Sprockets (15/45) - DID 520ERV3
- Micron Slip on - Pair/EVAP delete
- SS front brake lines - Gilles Rearsets
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post #3 of 7 (permalink) Old 12-05-2017, 02:02 AM Thread Starter
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I agree, I just clicked on the pictures myself and they were pretty useless LOL basically the very left cylinder has a pinhole leak only leaking coolant
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post #4 of 7 (permalink) Old 12-05-2017, 02:07 AM Thread Starter
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Circled in red is where the tiny pinhole leak is… After wiping that part of the block off as soon as the engine warms up coolant slowly starts to seep
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post #5 of 7 (permalink) Old 12-05-2017, 07:38 AM
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First thing you need to do is completely clean the area off so we can see what’s going on, then take clear, right side up, large pictures of the area so we can help.

A pinhole in the side of the engine seems like a strange place to develop unless the bike was crashed or maybe filled with water instead of coolant and froze during cold months.

Where are you located, OP?

- '17 Ducati Supersport S
- '13 Kymco Super 8 150
- '11 Triumph Sprint GT
- '10 Yamaha WR250R
- Past rides: too many to list

Last edited by Miweber929; 12-06-2017 at 04:00 PM.
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post #6 of 7 (permalink) Old 12-06-2017, 12:58 PM
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Remove JB weld crap and have professional weld hole up. Doesn't really matter what the pics look like, this is your only real option if the engine block is indeed leaking besides replacement.

'06 F4i- Yoshimura RS-3C, Racetech springs and valves, Ohlin's rear shock, steel brake lines, 520 conversion. 87k miles and counting.....
'08 600RR- Stripped trackbike. CRG shorty brake lever, goodridge front brake lines
'15 1000RR- weekend toy
------Disclaimer: I can't spell------
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post #7 of 7 (permalink) Old 12-06-2017, 02:43 PM
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Welding would be best. Another option: drill>tap>screw+sealing washer, if there is enough space.

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