Author Topic: Leak free engine...yea right!  (Read 10428 times)

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Offline brandEn

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Leak free engine...yea right!
« on: September 15, 2012, 08:32:32 PM »
I have countless hours (and dollars) in my build the latest of which have gone into getting a leak free engine. My projects have usually snowballed into bigger ones. Like the first time I replaced my head gasket after my fresh rebuild and I pulled a head stud right out of its threads! I have replaced the head gasket and base gasket (with Cometic) a few times, various o rings, side cover gaskets, cam tower pucks, cam cover gaskets, oil filters...... etc just to get another leak someplace else. I am done chasing leaks. I just replaced another cam cover gasket yesterday just to have another mystery seep rear its ugly head. I give up. My bike has earned its name the Annoying Orange. That is all.


watch the video below. I am the apple and my leaking bike is the orange. This is what I hear every time I go to the garage...lol


The Annoying Orange


« Last Edit: September 15, 2012, 08:38:09 PM by brandEn »

Offline luap

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Re: Leak free engine...yea right!
« Reply #1 on: September 15, 2012, 09:55:34 PM »
good looking bike. great video
75-550 ffsc sold, 78-550 diamonte sold, 125s grasshopper sold, 76-550 puma sold, 78-550 tracker sold, 74-550 verde diablo Sold, 74-550 Noemani finished trying to sell. 72 500 hartail in the works
www.cb-town.com
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Offline brandEn

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Re: Leak free engine...yea right!
« Reply #2 on: September 15, 2012, 10:25:11 PM »
good looking bike. great video
Thanks man, your hard tail is bad ass.

Offline The other Derek

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Re: Leak free engine...yea right!
« Reply #3 on: September 15, 2012, 10:41:03 PM »
I'm sure it's frustrating, but all I can say is WOW.  It may be annoying, but it is truly beautiful.

Offline Terry in Australia

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Re: Leak free engine...yea right!
« Reply #4 on: September 16, 2012, 12:00:48 AM »
Yeah, don't get too frustrated mate, remember, it's not leaking oil, it's just venting excess power. Cheers, Terry. ;D
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Offline killersoundz

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Re: Leak free engine...yea right!
« Reply #5 on: September 16, 2012, 12:08:31 AM »
You have bad luck my friend!! I don't want to pour salt into your wound here but I took a seized up rusted out 750k4 motor, did a basic top end rebuild with new gaskets, haven't got a leak anywhere! Your motor sounds cursed!! Did you clean up the mating surfaces before putting the new gaskets on? Like most of the time the old gaskets will rip and leave some pieces or residue at least. That's the only thing I can think of.

My project thread:

http://forums.sohc4.net/index.php?topic=107447.0

My CB750K4 Starting up for the first time after a seized motor and rebuild!


Offline Rgconner

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Re: Leak free engine...yea right!
« Reply #6 on: September 16, 2012, 07:08:58 AM »
Why didn't the Japanese go into space?


Honda couldn't figure out how to make it leak oil.

If it were not such clean bike, I would say look at a oil bypass mod, take the pressure off the little oil jets.
1975 CB550K aka "Grease Monkey"

Offline brandEn

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Re: Leak free engine...yea right!
« Reply #7 on: September 16, 2012, 10:31:03 AM »
Yeah, don't get too frustrated mate, remember, it's not leaking oil, it's just venting excess power. Cheers, Terry. ;D

haha! You made me lol

Offline brandEn

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Re: Leak free engine...yea right!
« Reply #8 on: September 16, 2012, 10:31:56 AM »
You have bad luck my friend!! I don't want to pour salt into your wound here but I took a seized up rusted out 750k4 motor, did a basic top end rebuild with new gaskets, haven't got a leak anywhere! Your motor sounds cursed!! Did you clean up the mating surfaces before putting the new gaskets on? Like most of the time the old gaskets will rip and leave some pieces or residue at least. That's the only thing I can think of.



good for you!

 ;)

Offline brandEn

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Re: Leak free engine...yea right!
« Reply #9 on: September 16, 2012, 10:32:15 AM »
I'm sure it's frustrating, but all I can say is WOW.  It may be annoying, but it is truly beautiful.

Thanks!

Offline speedy gonzalais

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Re: Leak free engine...yea right!
« Reply #10 on: September 16, 2012, 10:50:13 AM »
sounds to me like your oil pressure is a bit high, av you checked for clogged breathers?
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Offline liPPy

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Re: Leak free engine...yea right!
« Reply #11 on: September 16, 2012, 11:14:28 AM »
I hear you BrandEn! Keeping these running faultlessly is a nigh impossible task.

I got my engine buttoned up with zero leaks until I accidentally caught the stator cover on a table leg in my garage. Cover had been repaired, sanded & painted but wouldn't you know the impact was square on the jb welded bit. A tiny micro crack caused it to weep maybe a single drop per 30 miles or so.

Got that taken care of and the front brake starts to drag.

Rebuilt the caliper and noticed a harmonic wobble - I'd lost a balancing weight from the rear wheel.

Got the wheels re-balanced and the brakes drag again.

Reset the brakes and I got a sticking float valve on one of the carbs.

And so it goes on!!!! It's like "whack a mole".

If these bikes were perfect there'd be nothing to fix and where would the fun be in that?!


Offline Killer Canary

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Re: Leak free engine...yea right!
« Reply #12 on: September 16, 2012, 11:26:18 AM »
BURN IT!
If it's worth doing at all it's worth over-doing.
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Offline brandEn

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Re: Leak free engine...yea right!
« Reply #13 on: September 16, 2012, 12:04:35 PM »

Offline BobbyR

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Re: Leak free engine...yea right!
« Reply #14 on: September 16, 2012, 12:42:48 PM »
Are you using a torque wrench to make sure the fastener tensions are even?
If that is not the case:

Your problem is you are using the wrong type of oil.  ;D ;D ;D ;D ;D ;D ;D ;D ;D
Dedicated to Sgt. Howard Bruckner 1950 - 1969. KIA LONG KHANH.

But we were boys, and boys will be boys, and so they will. To us, everything was dangerous, but what of that? Had we not been made to live forever?

Offline brandEn

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Re: Leak free engine...yea right!
« Reply #15 on: September 16, 2012, 01:28:10 PM »
Are you using a torque wrench to make sure the fastener tensions are even?
If that is not the case:

Your problem is you are using the wrong type of oil.  ;D ;D ;D ;D ;D ;D ;D ;D ;D

Olive oil right? haha!

Offline andy750

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Re: Leak free engine...yea right!
« Reply #16 on: September 16, 2012, 02:17:10 PM »
I feel your pain. I have been chasing an oil free bike for years...finally managed it on the K4 but the K2 810cc continues to elude me - sprocket seal is leaking after replacement and a tiny head leak from rebuilt engine 6000 miles later (not getting on the covers yet). As long as its not coating your wheels or your trousers then ride it!  8)

good luck!
Andy
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline brycegp

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Re: Leak free engine...yea right!
« Reply #17 on: September 16, 2012, 02:53:11 PM »
some may curse me...but after installing gaskets and chasing leaks on each of them....NOW i use Ultra Grey on both sides of all my gaskets when I install them.  No leaks! 

1971 CB750K/F - El Toro
El Toro Build Thread - http://forums.sohc4.net/index.php?topic=73552.0

Offline Duanob

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Re: Leak free engine...yea right!
« Reply #18 on: September 17, 2012, 08:45:11 PM »
You can't call it vintage if it doesn't leak a bit of oil. Just ride the piss out of it and enjoy it. Backfire moto is coming this next wednesday, go have a blast.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

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Offline seanbarney41

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Re: Leak free engine...yea right!
« Reply #19 on: September 17, 2012, 09:16:12 PM »
Branden, this makes me feel better about all my leaky ass junk...yours is not junk!...but at least we have something in common
If it works good, it looks good...

Offline Garystratos201

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Re: Leak free engine...yea right!
« Reply #20 on: September 18, 2012, 06:07:13 AM »
Good looking bike !!!.......Gary
Visit my build project;
http://forums.sohc4.net/index.php?topic=111620.0

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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Leak free engine...yea right!
« Reply #21 on: September 18, 2012, 10:04:48 AM »
I know you know what you're doing as witnessed by your quality but.... U sure it's not the tach cable seal?

Bryce mentioned doctoring-up the gaskets. You have the frame kit so it's not all bad. Use one of the spray sealers like Copper Kote or whatever it's called. Not sure about Bryce's product. Unfamiliar. 

Maybe this is why mine is ALMOST done. Perhaps I wish to delay the inevitable  :)
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline brycegp

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Re: Leak free engine...yea right!
« Reply #22 on: September 18, 2012, 11:42:46 AM »
Ultra Grey is a gasket maker paste.  You can use it in place of a gasket for lower pressure applications.  In this case, I use it as reinforcement to the gasket..filling any inconsistencies in the mating surfaces that otherwise lead to leaking gaskets.
1971 CB750K/F - El Toro
El Toro Build Thread - http://forums.sohc4.net/index.php?topic=73552.0

Offline Jiminy Indy

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Re: Leak free engine...yea right!
« Reply #23 on: September 18, 2012, 12:17:20 PM »
Only because I'm such a big hearted, warm & caring human being go ahead and give me your bike. I only do this to alleviate your stress level and certainly take no pleasure in it. Just doing my part to make this a better world...
Of all the things I've lost, I miss my mind the most.

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Offline brandEn

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Re: Leak free engine...yea right!
« Reply #24 on: September 18, 2012, 05:23:03 PM »
some may curse me...but after installing gaskets and chasing leaks on each of them....NOW i use Ultra Grey on both sides of all my gaskets when I install them.  No leaks! 



I don't curse you, thats for sure. Whatever works bro!