Oil on alternator


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ftmoore992003
Posts: 15
Joined: Fri May 21, 2010 6:40 pm
Location: Houston Ms
Motorcycle: 1998 GL 1500 SE
1984 V65 magna

Oil on alternator

Post by ftmoore992003 » Sun Apr 07, 2019 10:27 am



On the alternator diagram, 2000 GL 1500 SE part # 1, 13531-mt8-000 is there a seal that goes in front of this part? There is oil coming from the alternator and its on the rubber dampers when replaced and cranked. It was dry when it was removed. It was dry before when the other 3 alternators were removed. Anyone ever replaced a seal in front of the alternator by any chance?



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MikeB
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Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Oil on alternator

Post by MikeB » Sun Apr 07, 2019 2:41 pm

Oil leaking from the engine into the alternator means the seal is gone.

You will most likely have to take it apart to replace the seal.
If this is an OEM alternator, the seal is a 22x38x7. It can be bought at any bearing supply.
The Honda Part Number is 31104-MN5-005 if you want to buy from the dealer.
MikeB
Tacoma, WA, USA

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ftmoore992003
Posts: 15
Joined: Fri May 21, 2010 6:40 pm
Location: Houston Ms
Motorcycle: 1998 GL 1500 SE
1984 V65 magna

Re: Oil on alternator

Post by ftmoore992003 » Sun Apr 07, 2019 3:04 pm

Is the oil coming from the alternator or behind the dampers?

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MikeB
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Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Oil on alternator

Post by MikeB » Sun Apr 07, 2019 11:11 pm

The oil is coming from the engine. There is no oil in the alternator.
MikeB
Tacoma, WA, USA

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ftmoore992003
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Location: Houston Ms
Motorcycle: 1998 GL 1500 SE
1984 V65 magna

Re: Oil on alternator

Post by ftmoore992003 » Mon Apr 08, 2019 1:48 pm

That’s what I thought. What I’m getting at is how do you repair of the oil leak is there a seal back behind the alternator on the motor?

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MikeB
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Location: Tacoma, WA
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2003 - GL1800A

Re: Oil on alternator

Post by MikeB » Mon Apr 08, 2019 2:16 pm

No, that is how the motor is designed. Once the alternator is removed you now have an open engine. What needs to be done is to replace the seal on the alternator input.
MikeB
Tacoma, WA, USA

User avatar
ftmoore992003
Posts: 15
Joined: Fri May 21, 2010 6:40 pm
Location: Houston Ms
Motorcycle: 1998 GL 1500 SE
1984 V65 magna

Re: Oil on alternator

Post by ftmoore992003 » Tue Apr 09, 2019 4:05 pm

Thanks Mike for the info.

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MikeB
Posts: 2479
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Oil on alternator

Post by MikeB » Tue Apr 09, 2019 4:24 pm

It would also be a good idea to get a new O-Ring for the alternator where it goes into the alternator well on the engine.
O-RING (84.5X4), Honda Part # 91320-MN5-003


MikeB
Tacoma, WA, USA

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