Question about timing belt components


Information and questions on GL1500 Goldwings (1988-2000)
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NOVAwing
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Motorcycle: 1993 GL1500 Aspencade

Question about timing belt components

Post by NOVAwing » Wed Aug 01, 2018 10:08 am



I love WingAdmins write up on the timing belt replacement.

THANK YOU !

I plan to do it soon, without draining coolant as I just flushed it last month lol.

However, with my background in car repair, we ALWAYS change the tensioner with the timing belt and also in most cases the water pump.

I don't see any real reference to these things relating to the GL1500.

It also appears the tensioner on this bike is operated by an external spring(s)?

My 1993 GL1500 Aspencade sat for about 4 years without being run.
It had 89k miles, and I had to replace the speedo cable to get it to work.
No clue if it was working properly before it was parked. May have 100k miles for all I know lol.

At this age/mileage, would it make sense to replace the belt, tensioner, and springs?
What's the deal with the water pump? Does it never/rarely go bad or what?

Where is a good, low cost place to get the proper tensioner and springs?
What about the water pump if it should be done?

I want to be clear on these issues as I am about to order the parts any day now.
Looks like I'm going with lowest priced gates belts on Amazon unfortunately.

Other places want way to much for the belts and tensioner.

Please advise good Wingers.

Thanks,
NOVAwing


NOVAwing
1993 GL1500 Aspencade, restored from 4 years rotting outside.

“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.”

DaveO430
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Re: Question about timing belt components

Post by DaveO430 » Wed Aug 01, 2018 10:31 am

The reason for changing the water pump on most cars is the pump is running on the timing belt. The 1500 water pump is separate and can be changed without removing the timing covers & they generally last a good long time. Spin the tensioner pulleys and if they are smooth you can reuse them if you want. There is no cheap alternative to genuine Honda parts for the tensioners. I worked on Honda cars a good many years and we hardly ever replaced the tensioner pulley but did have to replace the oil filled tensioner plunger most of the time.

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NOVAwing
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Re: Question about timing belt components

Post by NOVAwing » Wed Aug 01, 2018 10:51 am

DaveO430 wrote:
Wed Aug 01, 2018 10:31 am
The reason for changing the water pump on most cars is the pump is running on the timing belt. The 1500 water pump is separate and can be changed without removing the timing covers & they generally last a good long time. Spin the tensioner pulleys and if they are smooth you can reuse them if you want. There is no cheap alternative to genuine Honda parts for the tensioners. I worked on Honda cars a good many years and we hardly ever replaced the tensioner pulley but did have to replace the oil filled tensioner plunger most of the time.
Hi Dave,

Thanks for the reply.

That is good to know about the Wing water pump, one less thing to mess with.

Good point, by tensioner, I meant the mechanism that provides the pressure, the tensioner in the case of cars, I guess spring(s) in the case of the Wing?

The pulley is just a sliding pulley like you said.

Shouldn't the springs be replaced then with the belt? Would make sense to me..... if they fail the belt gets loose, jumps timing and bam! Crying time...….

Would partzilla be the go-to for the tensioner springs?

Thanks,
NOVAwing
NOVAwing
1993 GL1500 Aspencade, restored from 4 years rotting outside.

“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.”

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virgilmobile
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Re: Question about timing belt components

Post by virgilmobile » Wed Aug 01, 2018 11:40 am

The spring...It's purpose is suppose to provide the correct tension on the belt when there put on and then the idler plate is secured tight to the block.
The springs do not keep the belt tight like the serpentine belt on your truck.
I don't trust aging springs to properly take the slack out of my belts.Ill snug the bolts to set them...adjust as needed for the proper "give" on the long side.Its specific adjustments of belt deflection in inches with a weight.
Example...The belt. Will move from rest 3/8" with 2lb of pressure.(Check your specs)
I use a fish weight scale and lift my belt the distance recommend by the book.

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NOVAwing
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Re: Question about timing belt components

Post by NOVAwing » Wed Aug 01, 2018 12:00 pm

virgilmobile wrote:
Wed Aug 01, 2018 11:40 am
The spring...It's purpose is suppose to provide the correct tension on the belt when there put on and then the idler plate is secured tight to the block.
The springs do not keep the belt tight like the serpentine belt on your truck.
I don't trust aging springs to properly take the slack out of my belts.Ill snug the bolts to set them...adjust as needed for the proper "give" on the long side.Its specific adjustments of belt deflection in inches with a weight.
Example...The belt. Will move from rest 3/8" with 2lb of pressure.(Check your specs)
I use a fish weight scale and lift my belt the distance recommend by the book.
Hi Virgil,

Thank you for the reply.

That is good to know!

So I do not really need those springs, excellent. I do however need to find a scale for setting the tension like you all seem to use. Does Harbor Freight sell something like this?

Thanks,
NOVAwing
NOVAwing
1993 GL1500 Aspencade, restored from 4 years rotting outside.

“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.”

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virgilmobile
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Re: Question about timing belt components

Post by virgilmobile » Wed Aug 01, 2018 12:40 pm

Walmart too.Fish scale is about$7
I left my springs there but actually they can be discarded.

DaveO430
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Re: Question about timing belt components

Post by DaveO430 » Wed Aug 01, 2018 1:20 pm

After the belts are on and you have rotated the engine a couple turns, turn it a little more in the normal direction (CCW) until you feel the straight side of the belt get tight against valve spring tension then loosen and retighten the tensioner bolts. That should get the belt tension just right.

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virgilmobile
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Re: Question about timing belt components

Post by virgilmobile » Wed Aug 01, 2018 1:59 pm

Here's "by the book" timing belt setting procedure.



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CrystalPistol
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Re: Question about timing belt components

Post by CrystalPistol » Wed Aug 01, 2018 2:44 pm

The springs are just there to aid in adjustment by acting as a weak third hand, they are not to be relied upon for tension. If the idler set bolt is tightened with the idler in whatever position the spring pulls it to, the belt will likely be loose. Set the tension by deflection as specified in the book. Notice that once set and locked, that spring does nothing.

I dare say many a GW has had a life of loose belt flop at idle / low speed.
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ct1500
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Re: Question about timing belt components

Post by ct1500 » Wed Aug 01, 2018 7:06 pm

DaveO430 wrote:
Wed Aug 01, 2018 1:20 pm
After the belts are on and you have rotated the engine a couple turns, turn it a little more in the normal direction (CCW) until you feel the straight side of the belt get tight against valve spring tension then loosen and retighten the tensioner bolts. That should get the belt tension just right.
That is what I do, except before tightening bolt using my thumb on tensioner give the belt just a tiny bit more tension, then tighten.
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Stew
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Re: Question about timing belt components

Post by Stew » Wed Aug 01, 2018 9:14 pm

When I replaced mine I didn't have a spring measurement hook like in WingAdmin's DIY, what I did have though was a 3 lb. and 5 lb. weight from a set of barbells. I fashioned a hook from a metal coat hanger and hung each weight from the timing belt and split the difference between the two weights. I also didn't open my cooling system since I had also recently flushed it and had put new coolant in, it's a little tighter getting the belt covers off and on but not that bad.


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19,119 miles when I got it from dad Oct 15, 2017 --- 24,532 miles and counting as of Oct 17, 2018!

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