Harmonic Balancer

How-to's and repair secrets for your 4WD can be found here. Have a question? Ask it in here!
Post Reply
grouchytom
Newbie
Posts: 15
Joined: Sat Nov 12, 2016 12:47 am
My tercel:: 87 SR5 Wagon

Harmonic Balancer

Post by grouchytom » Mon Aug 26, 2019 8:38 pm

When crank is on the crank timing mark the timing mark for the timing cover is approximately at 8oclock as viewed from the front of the motor. Could I have a bad balancer?

xirdneh
Highest Ranking Member
Posts: 1963
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: Harmonic Balancer

Post by xirdneh » Tue Aug 27, 2019 12:28 am

The pulley could have separated. Its held in place with rubber by, probably what is called vulcanized.
Love those Tercell 4x4 wagons but they sure suffer from road noise.

User avatar
NWMO
Highest Ranking Member
Posts: 609
Joined: Wed May 20, 2015 1:08 pm

Re: Harmonic Balancer

Post by NWMO » Tue Aug 27, 2019 3:44 am

Tom,

What “crank” timing mark are you using besides the harmonic balancer?

Chris
Psalm 37:4 "Delight yourself in the Lord and he will give you the desires of your heart"

In remembrance of my friend ARCHINSTL:

T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"

"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain

xirdneh
Highest Ranking Member
Posts: 1963
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: Harmonic Balancer

Post by xirdneh » Tue Aug 27, 2019 7:36 am

I was thinking he might have the top belt cover off and was looking at lower crank belt pulley mark.
Love those Tercell 4x4 wagons but they sure suffer from road noise.

User avatar
Petros
Highest Ranking Member
Posts: 11038
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: Harmonic Balancer

Post by Petros » Tue Aug 27, 2019 2:00 pm

the only way to know for sure is to take out the number one spark plug and visually get the piston to TDC using a flash light to look into the spark plug hole. You can see when the piston is exactly at TDC. than check the mark on the front blancer compared to the timing indicator. it should be at "O" when the piston is at the top of its travel.

if it is anywhere other than zero, the blanacer has to come off for inspection. several issues can cause this, a damaged or shear off key in the front pulley key-way, or a de-laminated harmonic balancer.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

grouchytom
Newbie
Posts: 15
Joined: Sat Nov 12, 2016 12:47 am
My tercel:: 87 SR5 Wagon

Re: Harmonic Balancer

Post by grouchytom » Tue Aug 27, 2019 2:50 pm

believe its a de-lamintated harmonic balancer. Have timing cover off and belt disconected using the crank mark and mark on the block. puts it at #1 TDC Timing mark on balancer is at about 8o'clock instead of 1o'clock which would be 0.

grouchytom
Newbie
Posts: 15
Joined: Sat Nov 12, 2016 12:47 am
My tercel:: 87 SR5 Wagon

Re: Harmonic Balancer

Post by grouchytom » Tue Aug 27, 2019 2:52 pm

keyway is good on crank and balancer

User avatar
Petros
Highest Ranking Member
Posts: 11038
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: Harmonic Balancer

Post by Petros » Tue Aug 27, 2019 10:09 pm

sounds like you need a new front pulley/balancer. That happens sometimes, oil weakens the bond as it ages, eventually it gives up.

there are places that can rebuild the old one, but finding a good used one is likely less expensive.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

Post Reply