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Timing belt service hints

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776 views 10 replies 4 participants last post by  Sherunsifyourenicetoher  
#1 · (Edited)
At least, a couple of things I wish I'd known about before I needed to know it.

Credentials: I work on my own stuff. Engine rebuilds, transmission fixes, rewiring (harness replacement), etc. for this and that, have done for many years. While I've had the Tracker for a couple of decades, I don't know much about it 'cuz it just keeps on running, so I don't fuss with it a whole lot. Just recently I replaced the timing belt/seals and the front cover. I did replace the belt years ago but it has been so long I can't say I remembered much about it.

1. If you remove the radiator for the job (not necessary, but gives you more room...so just do it), when it comes time to put the rad back in, take the donuts off the bottom of the rad, place them IN the frame holes, THEN put the rad back in place. I didn't to that at first and had a time trying to get the lip(s) of the donuts full into the frame holes. Not much room for picking/pushing/poking at the left one, either. It works much better to put the donuts in FIRST.

2. The timing belt tensioner linkage. I did recall having a bit of trouble with this the first time. It seemed to go fine, with the tab of the spring linkage fitting into the hole on the backside of the tensioner...but somewhere along the line it came OUT and I didn't notice it until I went to set the belt tension and realized something wasn't right.

This time, I put a bit of RTV (applied as is proper...let it dry a bit to keep from squeezing it all out) between the spring linkage and the back of the tension roller. Snugged it up with a nut on the mounting bolt, let it sit overnight. That made it MUCH easier to put the pieces back together.

WATCH that spring! It is NOT captive on either end and can easily fall off one end or the other.

There are several ways to thread the belt back into its correctly timed placement. Easiest for me was to have the tension roller installed and move the eccentric as far as you can in relation to the actual roller to allow for the most room for the belt. Place the belt on the two timed pulleys keeping the right side of it snug and with the belt NOT in place around the tensioner, then push/force the belt over the tensioner. You can do a bit of walking of either pulley to help with that. Set the tension. Be sure to tighten BOTH fasteners...the 10mm stud that fits through the linkage AND the 12mm bolt on the tension roller. I had the cover on and three bolts into the crank pulley before it came to mind: Did I tighten that 12mm? I took the pulley and cover off again just to check that I had. It was good.

That belt placement process worked a whole lot better than placing the belt 'around' the tensioner to start with then trying to get the belt into place onto the cam gear.

YMMV

3. And one'a these worked well for the crank bolt. It's a tool designed to work on motorcycle clutch baskets. Worked on the crank gear just fine!

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Why is the alternator fitment such a PITA? It could have been designed to be MUCH easier to get off/on.

Oh well. No one asked me what I thought about it.

Happy wrenching!
 
#3 ·
I wasn't on the clock, so didn't bother keeping track and was in no hurry with it.

As mentioned, the RTV cure for the tension assy was an overnight process, so this particular event was over the course of two days. A straightforward 'git it dun' approach to a belt r/r shouldn't take more'n an easy afternoon. If you are replacing the crank/cam seals it might take you longer. Removing the crank pulley (NOT required for just a belt r/r) might be troublesome for some 'cuz some of 'em are 'stuck' pretty good. DO be aware of the torque spec change to the crank pulley bolt! Original specs were WAY too light/small/liddle/biddy.

Thinking over the matter: Take the evap canister out. Not necessary, but it sure gets you a lot more room to fuss with the alternator.

Also, it was easier to take the distributor out than to fuss with the close-bits of getting the back valve cover off with the distributor IN. Taking that cover off for a belt r/r doesn't seem necessary to me...but is if you intend on following the FSM...which says to back off ALL the followers/rockers for a belt replacement. I took the cover off to replace the gasket 'cuz it was seeping some AND it was time for a valve clearance check. I have NOT backed off the rockers in past belt replacements and had no problems as a result. Do as you please.

Do keep in mind that the 'TDC' for the belt replacement is figured with #4 @ TDC. That puts the crank/cam pulley marks 'off' from conventional thinking. Thinking in the US anyway. BTW..ignition TIMING is done using cylinder #1. As long as you understand the basics of a 720º cycle (4-stroke) engine the 'off' of the pulley marks is easy enough to understand. If you don't (understand), just follow the FSM instructions and you will be fine.
 
#5 ·
Most auto shops give estimates based on their book that lists hours required to do 'a' job. If it says it takes five hours, that's $600 these days. That someone that knows what they are doing can do it in THREE hours simply means money in their pocket.

ASK questions if you have 'em. ASK what torque the crank pulley is going to be torqued to (if you are having seals r/r). Ask only a question you know the answer to. That is the only way you can tell if they are making it (the answer) up. If you assume 'they' know what they are doing, you are the essence of the slang interpretation of that word.

I had an auto shop replace a failed fusable link with a piece of wire. That resulted in a totaled, burned car later. They said, 'We didn't do that.' Liars, plain and simple.

A BTW: The pejorative you intended is 'gyp'; intended as a derogatory reference to Gypsies.

Good luck!
 
#8 ·
Re: Seals. If there is any oil leaking going on, replacing the seals when doing a timing belt makes sense. The rig is already mostly apart to get that done. The seals are cheap.

The radiator does not have to be removed to replace the timing belt. It does make the job a lot easier AND damage to the rad is less likely to happen TO it if it's OUT. Time saved doing the job when it's out is likely worth the time it takes to TAKE it out. IMO and all.

It also makes sense to replace the water pump. THAT kind'a depends on your comfort level and how long the existing pump has been in place. An 80K mile water pump is ripe for replacement.

Good luck. Hope it all turns out well for 'ya!
 
#9 ·
A little late to the party... but a great write-up on the Timing Belt replacement! (y)

A question on the use of the TUSK clutch tool to remove the Timing Gear bolt:
Did you use the tool on the harmonic balancer? Or engage it directly with the timing gear bolt holes?

I have a lot of moto tools, but not this one. But I have a friend who does... Any problems in re-torquing the bolt (and holding the timing gear) with this to the 95 ft-lbs? Looks like it would be easier with longer handles...
 
#10 ·
A question on the use of the TUSK clutch tool to remove the Timing Gear bolt:
Did you use the tool on the harmonic balancer? Or engage it directly with the timing gear bolt holes?
Don't know which 'timing gear bolt' you are referring to in this case. I used it on the crankshaft pulley bolt. That is necessary (to get either pulley off) only if you are changing the seal behind the gear. The cam gear comes off without any trouble. I'm not sure ('cuz I didn't use it) that the Tusk tool opens wide enough to grab the cam gear.

I don't recall wishing for longer handles. Squeeze the tool on, allow it to lock itself against something or supply your own blocker.

There is also no 'pulling' of the balancer. It also comes off with no trouble.

NONE of this (getting things apart) is related to dealing with a goobered keyway 'cuz someone torqued the crank bolt to 50lb/ft or whatever dumb number the FSM said to use.