Author Topic: Hey , my cb750 is leaking oil (Read 7966 times)

smpls70 · « **on:** July 08, 2013, 08:48:36 PM »

Yup , looks like I'm goin to be pulling the motor sometime in the near future and getting new gaskets, so , what are the best gaskets , and the ones that I want to avoid ( brands ) ??

harisuluv · « **Reply #1 on:** July 08, 2013, 09:48:02 PM »

Where you leaking? Head gasket?

smpls70 · « **Reply #2 on:** July 09, 2013, 04:54:46 AM »

It appears to be leakin between the cylinder block and head , I'm gonna give it a good cleaning in the next day or two and give it the foot powder test .
I also have a leak at the tach seal as well , but don't see how it can drip down that low

toytuff · « **Reply #3 on:** July 09, 2013, 05:02:09 AM »

Quote from: smpls70 on July 09, 2013, 04:54:46 AM

It appears to be leakin between the cylinder block and head , I'm gonna give it a good cleaning in the next day or two and give it the foot powder test .
I also have a leak at the tach seal as well , but don't see how it can drip down that low

Tach seal = cheap. Throws the oil out.

tt

smpls70 · « **Reply #4 on:** July 09, 2013, 07:09:35 AM »

Cam seal ? Cheap ?

toytuff · « **Reply #5 on:** July 09, 2013, 07:27:15 AM »

Quote from: smpls70 on July 09, 2013, 07:09:35 AM

Cam seal ? Cheap ?

Fixed. Senior moment. You'll have them some day.

tt

Davez134 · « **Reply #6 on:** July 12, 2013, 05:15:23 PM »

Quote from: smpls70 on July 08, 2013, 08:48:36 PM

Yup , looks like I'm goin to be pulling the motor sometime in the near future and getting new gaskets, so , what are the best gaskets , and the ones that I want to avoid ( brands ) ??

I'd say Honda gaskets are the best if possible. I just rebuilt my motor and used gaskets from Cycle X. They have different options based on your needs. Make sure your surfaces are not warped though. I am very happy, 3000+ miles and has not leaked a drop. (I replaced that cam/tach seal too)

smpls70 · « **Reply #7 on:** July 12, 2013, 06:27:22 PM »

So , I cleaned the motor the other nite best I could , tomorrow I'm goin to swap out that tach seal , give it a few day of riding and see what happens .
Maybe , just maybe the oil is runnin down from the tach side to the other side , fingers crossed X ! \m/ !!! Party on !

smpls70 · « **Reply #8 on:** July 12, 2013, 07:15:57 PM »

Um, what's the trick to getting that tach seal out , go.......

D-Ral · « **Reply #9 on:** July 12, 2013, 08:08:51 PM »

Drill a hole in it, thread a screw in the hole, and pull on the screw.

smpls70 · « **Reply #10 on:** July 12, 2013, 08:32:41 PM »

Got it !....... Put any kind of sealant on it ?

Davez134 · « **Reply #11 on:** July 13, 2013, 09:34:50 AM »

Quote from: smpls70 on July 12, 2013, 08:32:41 PM

Got it !....... Put any kind of sealant on it ?

No

smpls70 · « **Reply #12 on:** July 13, 2013, 09:38:42 AM »

werks fer me \m/

smpls70 · « **Reply #13 on:** July 29, 2013, 05:37:12 PM »

Think my leak is somewhere underneath....question is where , don't think it's the oil pan, never cleaned the bottom of the engine, it's filthy what's a common culprit ?

Davez134 · « **Reply #14 on:** July 29, 2013, 07:14:19 PM »

If you clean all oil off, check after riding for awhile and it's nothing obvious from around any gaskets, could be from chain oiler. Won't get too much oil on engine but will drip onto ground. Got any pictures?

smpls70 · « **Reply #15 on:** July 29, 2013, 07:30:09 PM »

Was wondering about the chain oiler ? Where is it ? I wanted to get into the front sprocket area , and tried to get that cover off , but, the " gear shift " cover is in the way, best description I could come up with , if I undo all those bolts , and there is a seal around the shifter cam , am i opening up a can off worms ?I dont want to be eff'in up gaskets and seals , but it does look like there is alot of oil accumulating back there .

70CB750 · « **Reply #16 on:** July 30, 2013, 04:18:24 AM »

Chain oiler is in the spindle of the front sprocket. It is only two bolts to get the cover off.

First picture is the oiler, second picture is the cover - position #1.

smpls70 · « **Reply #17 on:** July 30, 2013, 09:32:39 AM »

Thanks fer the diagrams cb750, just called the local Honda shop and they have that gasket and seal in stock , so no worrries pullin that cover off and wrecking the gasket , do I put any Honda bond on said new gasket ? Or seal ?

70CB750 · « **Reply #18 on:** July 30, 2013, 09:35:22 AM »

The sprocket cover has no gasket.

smpls70 · « **Reply #19 on:** July 30, 2013, 09:54:27 AM »

Was talkin bout the cover over the gear shift mechanism

smpls70 · « **Reply #20 on:** July 30, 2013, 09:55:57 AM »

#4 , gasket #5 on second diagram

Davez134 · « **Reply #21 on:** July 30, 2013, 10:00:04 AM »

You can put gasket on dry, make sure surfaces are clean and smooth, torque down evenly. Should have no problems.

smpls70 · « **Reply #22 on:** July 30, 2013, 04:40:30 PM »

Ain't she a bute ?

smpls70 · « **Reply #23 on:** July 30, 2013, 04:43:01 PM »

How do I shut that thing OFF ?

70CB750 · « **Reply #24 on:** July 30, 2013, 04:52:04 PM »

You need a plug, no matter how tight you close the oiler, it will still leak. If you have an old spark plug, I am pretty sure it is M14 - some spark plugs fit in there. Proper plug would be threaded with O-ring to seal the hole.

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Author Topic: Hey , my cb750 is leaking oil (Read 7966 times)