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Clutch Pushrod Oil Seal Popping Out

Started by mick6528, March 15, 2022, 04:56:47 AM

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mick6528

I replaced the clutch pushrod oil seal and now it pops out when the engine is started, dumping all the oil on the road.

It looks like the housing where the oil seal fits in has been damaged at the back so that the oil pressure forces it out.

It looks like the damage was there a while but the previous seal held without any problems.

Has anybody encountered this before?

I'm wondering if there is a safe way of using an adhesive to hold the seal in without the risk of it dumping the engine contents on my back tire.

ribbert

Quote from: mick6528 on March 15, 2022, 04:56:47 AM
I replaced the clutch pushrod oil seal and now it pops out when the engine is started, dumping all the oil on the road.

It looks like the housing where the oil seal fits in has been damaged at the back so that the oil pressure forces it out.

It looks like the damage was there a while but the previous seal held without any problems.

Has anybody encountered this before?

I'm wondering if there is a safe way of using an adhesive to hold the seal in without the risk of it dumping the engine contents on my back tire.

In order of likely causes based on what you've said, first would be the wrong seal, after all, the last one held OK. Scratching up the housing with a chisel or centre punch is actually standard practice for a seal that doesn't fit tight enough so it's unlikely to be caused by the damage you can see. The crankcase is ventilated by other means offering a pathway of much less resistance, assuming that's not blocked there wouldn't be enough pressure to blow the seal out.

Think about it logically, the old seal didn't blow out and the new one does and nothing else has changed, what does that suggest?

I use Loctite 641 for seals and bearings but I really don't think that's your problem, I've never heard of this before (on an FJ).

Where did the seal come from?

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

Pat Conlon

That's funny....Crankcase venting is not the issue. The oil pressure on the clutch push rod is considerable as anyone can attest who has started their engine without the clutch slave installed.....
Just ask my cat.....

Did you use a genuine Yamaha seal?
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

ribbert

Quote from: Pat Conlon on March 15, 2022, 09:32:44 AM
That's funny....Crankcase venting is not the issue. The oil pressure on the clutch push rod is considerable as anyone can attest who has started their engine without the clutch slave installed.....
Just ask my cat.....


...and it gets funnier.

So you're saying the seal is subject to oil pressure and this forces it out. How does the seal come to have oil pressure bearing on it?

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

racerrad8

Quote from: ribbert on March 16, 2022, 07:50:52 AM

...and it gets funnier.

So you're saying the seal is subject to oil pressure and this forces it out. How does the seal come to have oil pressure bearing on it?

Noel

Noel,

The information you seek regarding the pressurized oil at the seal can be easily found in the GYSM...

Mick, snap a photo of the housing with the seal and shaft removed. I can advise if there is damage.

Randy -RPM
Randy - RPM

ribbert

Quote from: racerrad8 on March 16, 2022, 08:01:55 AM
Quote from: ribbert on March 16, 2022, 07:50:52 AM

...and it gets funnier.

So you're saying the seal is subject to oil pressure and this forces it out. How does the seal come to have oil pressure bearing on it?

Noel

Noel,

The information you seek .........
Randy -RPM

Credit where credit's due.

Pat, I suspect it wasn't intentional but Randy responding was a knock out tactical move. You avoid answering and I can't make any further comment.

Maybe we'll get to revisit it sometime in the future.



Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

ribbert

Quote from: racerrad8 on March 16, 2022, 08:01:55 AM

Noel,

The information you seek regarding the pressurized oil at the seal can be easily found in the GYSM...

Mick, snap a photo of the housing with the seal and shaft removed. I can advise if there is damage.

Randy -RPM

Thanks Randy, I don't have a manual but I know what you're referring to and that wasn't the information I was after on this occasion.

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

Pat Conlon

Quote from: ribbert on March 15, 2022, 06:36:09 AM
...The crankcase is ventilated by other means offering a pathway of much less resistance, assuming that's not blocked there wouldn't be enough pressure to blow the seal out.....

Noel, I don't understand your confusion....
The oil pressure on the clutch push rod seal comes from the oil pump...not from pressure in the crankcase.

Do you agree with this?  If so, why do you even mention crankcase pressure?

It's ok, no big deal....you just got confused....


.....again....
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

ribbert

"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

ribbert

Quote from: ribbert on March 18, 2022, 08:09:49 AM
Quote from: Pat Conlon on March 17, 2022, 02:49:29 PM


It's ok, no big deal....you just got confused....


.....again....




Pat, I responded to your post, I know it got posted because I saw it there. ???

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

Pat Conlon

1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Dads_FJ

Quote from: ribbert on March 19, 2022, 03:56:52 AM
Quote from: ribbert on March 18, 2022, 08:09:49 AM
Quote from: Pat Conlon on March 17, 2022, 02:49:29 PM


It's ok, no big deal....you just got confused....


.....again....




Pat, I responded to your post, I know it got posted because I saw it there. ???

Noel

Did your response include a picture that violated the terms of use?

Just trying to keep it light.   :flag_of_truce:
John S.

'84 Yamaha FJ1100
'89 Yamaha FJ1200
'94 Yamaha WR250
'80 BMW R100S/Sidecar
'39 BSA WM20

FJmonkey

The standards of modesty differ form country to country. I think the USA is a bit behind on what the public can/should see. But pulling the wool off too soon would be a shock to the culture norms. So the big question still remains....

How much of the naked clutch can we show before it turns into FJporn?
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

giantkiller

Quote from: FJmonkey on March 19, 2022, 06:44:59 PM
The standards of modesty differ form country to country. I think the USA is a bit behind on what the public can/should see. But pulling the wool off too soon would be a shock to the culture norms. So the big question still remains....

How much of the naked clutch can we show before it turns into FJporn?

:rofl:
86 fj1350r
86 fj1380t turbo drag toy (soon)
87 fj1200 865 miles crashed for parts
89 fj1200 touring 2up
87 fzr1000 crashed
87 fzr750r Human Race teams world endurance champion
93 fzr600 Vance n hines ltd for sale
Custom chopper I built
Mini chopper I built for my daughter just like the big 1

krusty

Quote from: giantkiller on March 19, 2022, 07:31:48 PM
Quote from: FJmonkey on March 19, 2022, 06:44:59 PM
The standards of modesty differ form country to country. I think the USA is a bit behind on what the public can/should see. But pulling the wool off too soon would be a shock to the culture norms. So the big question still remains....

How much of the naked clutch can we show before it turns into FJporn?

:rofl:
When grease nipples are pixellated? :rofl2:
91 FJ1200
84 FJ1100 x 2
85 FJ1100
89 GL1500
76 CB750F1
72 CB350F
63 C92 x 2
59 C76
62 C100
63 C100
60 Colleda 250TA x 3
63 Suzuki MD50
77 DT125E
77 DT175E x 2
79 DT250F