timing belt pulley removal


Information and questions on GL1100 Goldwings (1980-1983)
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davegerman
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Location: Tampa, FL
Motorcycle: 1981 1100 Interstate

timing belt pulley removal

Postby davegerman » Wed Nov 30, 2011 5:41 pm



Just picked up an '81 rust bucket and got it running great (thanks for the carb sync and valve adj articles). My son gave it a "test ride" and managed to crash into the curb (20 feet away). It cracked the timing belt cover and damaged the left side pulley. Aside from the obvious lessons in this story, do you have any tips on the pulley removal? Looks like a standard gear puller would do the trick, but I would like confirmation before I do more damage. I'm trying to see the value in this opportunity to change the timing belts :x



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WingAdmin
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Re: timing belt pulley removal

Postby WingAdmin » Wed Nov 30, 2011 9:47 pm

You need to hold the pulley in place so that it doesn't turn - Honda has a special tool for this, but you can make do gently with a C-clamp. Then remove the bolt on the front of the pulley and it should come right off.

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RoadRogue
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Re: timing belt pulley removal

Postby RoadRogue » Wed Nov 30, 2011 11:10 pm

sounds like a set of engine guards are in your future too. At least there are lots of parts out there.(see the for sale/wanted page of this forum).
Ride safe, Todd
Over night campers welcome

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RoadRogue
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Re: timing belt pulley removal

Postby RoadRogue » Wed Nov 30, 2011 11:12 pm

Oh ya , Welcome to the group. Theres lots of info here,just ask, we know everything.............................. :roll:
Ride safe, Todd
Over night campers welcome

davegerman
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Location: Tampa, FL
Motorcycle: 1981 1100 Interstate

Re: timing belt pulley removal

Postby davegerman » Thu Dec 01, 2011 7:54 am

Thank you for the guidance. The belt broke in the crash and I assume the pulley moved as well, so timing is already off. Although I'm building a naked bike, I might just compromise on those engine guards....

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RBGERSON
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Re: timing belt pulley removal

Postby RBGERSON » Thu Dec 01, 2011 8:21 am

Take screw out and pull off by hand..I never had a problem with them..also I have pulleys and covers $10 each plus shipping if you don't have replacements close by.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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dingdong
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Re: timing belt pulley removal

Postby dingdong » Thu Dec 01, 2011 9:19 am

You may have more damage than you think. If the belt broke while the engine was running you probably have, at a minimum, valve damage on that side. (Obvious lesson: Send son to to a motorcycle riding class).
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

davegerman
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Location: Tampa, FL
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Re: timing belt pulley removal

Postby davegerman » Thu Dec 01, 2011 11:33 am

Not what I wanted to hear, but that makes sense with interference. I think it stalled on (curb) contact, so hopefully it didn't turn over. Thank you.

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RoadRogue
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Re: timing belt pulley removal

Postby RoadRogue » Thu Dec 01, 2011 10:31 pm

A leak down test will tell you if the valves are bent and not sealing.
Ride safe, Todd
Over night campers welcome

RexAubrey
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Re: timing belt pulley removal

Postby RexAubrey » Thu Dec 01, 2011 11:21 pm

At the risk of sounding ignorant.... :roll: Does anyone have instructions on how to do a leak down test. Ok, so it was not much of a risk....I am ignorant on this test :lol: .
Rex
1983 GoldWing Interstate, 1982 GoldWing Aspencade, 1981 Yamaha 550 Maxim, 1979 Yamaha 650 Special

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RBGERSON
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Re: timing belt pulley removal

Postby RBGERSON » Fri Dec 02, 2011 8:29 am

I'd replace belts, pulley..set valves turn over by hand..if you can't turn it over for several full revolutions by hand = bent valve someplace. If you can, do a compression test if all above 140 and below 170 valves OK, if one really low..bent valve and/or holed piston. Leak down test can also show you bad seat..as well as bent valve..of course either need to be fixed.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

davegerman
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Joined: Tue Nov 01, 2011 10:53 am
Location: Tampa, FL
Motorcycle: 1981 1100 Interstate

Re: timing belt pulley removal

Postby davegerman » Fri Dec 02, 2011 10:25 am

Thanks guys, I'll do the test. (I admit it, I had to google it too).

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WingAdmin
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Re: timing belt pulley removal

Postby WingAdmin » Fri Dec 02, 2011 10:45 am

RexAubrey wrote:At the risk of sounding ignorant.... :roll: Does anyone have instructions on how to do a leak down test. Ok, so it was not much of a risk....I am ignorant on this test :lol: .


A leakdown test is similar to a compression test - except instead of seeing what the maximum pressure the cylinder develops, you're checking to see if the cylinder can hold the pressure.

You can buy a leakdown tester that hooks up to your compressor. You thread it into the spark plug hole, rotate the engine until both valves are closed, then pressurize the cylinder with the compressor and watch to see if it holds the pressure.

You can also do a "poor man's leakdown test" with a regular pressure gauge, by rotating the engine to the top of the compression stroke, and watching to see if the cylinder holds the pressure.

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scotterichmond
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Re: timing belt pulley removal

Postby scotterichmond » Fri Dec 02, 2011 12:13 pm

WingAdmin wrote:
RexAubrey wrote:At the risk of sounding ignorant.... :roll: Does anyone have instructions on how to do a leak down test. Ok, so it was not much of a risk....I am ignorant on this test :lol: .


A leakdown test is similar to a compression test - except instead of seeing what the maximum pressure the cylinder develops, you're checking to see if the cylinder can hold the pressure.

You can buy a leakdown tester that hooks up to your compressor. You thread it into the spark plug hole, rotate the engine until both valves are closed, then pressurize the cylinder with the compressor and watch to see if it holds the pressure.

You can also do a "poor man's leakdown test" with a regular pressure gauge, by rotating the engine to the top of the compression stroke, and watching to see if the cylinder holds the pressure.



It will also tell you where the leakage is going by locating listening to where the air is escaping from, i.e. intake, exhaust ,or crank case.




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