cam gears not moving

[86.5supraturbo]

Ok, so my timing belt broke when i went to start my supra and after i changed it i was turning the crank shaft and the timing gears arent moving. I put a wrench on the timing gears to try to turn them and the bolt just keeps getting tighter they wont turn, any suggestions or anyone know anything? LMK PLEASEEE thanx

 

[OfnaRcR4]

You must have the belt routed wrong. Double check how you put it in. Don't try to turn the engine over(or the cam gears with the belt attached) with the cam gear bolts.

 

[GrimJack]

Or the belt broke because something froze one or both of the cams...

 

[OfnaRcR4]

Or the belt broke because something froze one or both of the cams...

Very true

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[mkiiichip]

So both of the cams stopped at top dead center, when the belt broke? Or how did you get the new belt on?

 

[mk3_7m]

Better open up your rocket covers and check inspect the cams.

 

[IJ.]

Or the belt broke because something froze one or both of the cams...

Would be my guess, There is minimal load on the belt with the stock Valve springs, you can spin a Cam with a cordless drill.

Better open up your rocket covers and check inspect the cams.

Or he could open a Cam Cover and see if he can turn a Cam with the bolt on it's end as our Engines don't have "Rockers" so no "Rocker" Covers

 

[86.5supraturbo]

Ok so my car started and ran fine, i changed the cam gears and put the belt back on the gears and tightened the tensioner and went to start it and it just cranked over, found out the belt broke. i changed the belt and i obviously had to take the harmonic balancer off and lower timing cover, i put all that back together and when i went to tighten the harmonic balancer the cam gears werent turning and a lower pulley was skipping teeth on the belt. I tried turning the cam gears and they just tighten more and more, i pulled the cam covers off and dont see anything wrong. I have never done anything in this sort to know what to look for or what im doing and never have i heard of this happening. one second itsa fine n the next they wont move.

 

[IJ.]

Did you slide the lower cam pully off the crank at all?

 

[86.5supraturbo]

Yes i did take the pulley off, i had to to get the timing cover off.

 

[mk3_7m]

Would be my guess, There is minimal load on the belt with the stock Valve springs, you can spin a Cam with a cordless drill.


Or he could open a Cam Cover and see if he can turn a Cam with the bolt on it's end as our Engines don't have "Rockers" so no "Rocker" Covers

Ah i apologize >.<, I grew a bad habit from my british friends calling it rocker boxes and it comes out as "rocket" from them.

 

[TweeT91109]

Yes i did take the pulley off, i had to to get the timing cover off.

By any chance did the "woodriff", or "key way" fall out and you not notice? That needs to be in the inside pulley behind the balancer to move with the crank.

 

[IJ.]

Did you slide the lower cam pully off the crank at all?

Yes i did take the pulley off, i had to to get the timing cover off.

Not talking about the Damper...

Ah i apologize >.<, I grew a bad habit from my british friends calling it rocker boxes and it comes out as "rocket" from them.

LOL you I can come hurt it person!! :evil2:

Stop it!!

By any chance did the "woodriff", or "key way" fall out and you not notice? That needs to be in the inside pulley behind the balancer to move with the crank.

If the damper was torqued correctly to 195 ft/lbs it wouldn't matter apart from location the key doesn't drive the pully.

 

[TweeT91109]

If the damper was torqued correctly to 195 ft/lbs it wouldn't matter apart from location the key doesn't drive the pully.

well when I installed mine I made sure to get all of these new, cause I had no idea what they were, but after some research...I thought they were important but I guess not...

 

[GrimJack]

well when I installed mine I made sure to get all of these new, cause I had no idea what they were, but after some research...I thought they were important but I guess not...

They are important, believe me. And they don't cost much, so it sounds like you made the right choice AND didn't break the bank.

I've always followed the mantra that if it's not expensive, why not buy a new one to replace the 20 year old part on the car? It's not like you're giving up food for your kids over a $1 part.

 

[IJ.]

well when I installed mine I made sure to get all of these new, cause I had no idea what they were, but after some research...I thought they were important but I guess not...

I was just talking about this specific case and the concept that if the Key was missing the cams would have enough load to slip the bottom pully on the crank.

This as I pointed out is not the case if the Damper is torqued down, even more so with stock Valve springs, you can spin the cams with a cordless drill

I'm with Dave (GrimJack) I always replace as much as possible if it's not stupidly expensive, it's the details that kill these engines.

 

[TweeT91109]

, it's the details that kill these engines.

Yea and come to find out there's a lot of them.

 

[jonahs_supra]

Seems weird that you installed new belt but can turn the cams
When belt broke did you line cams and crank up or just threw a new belt on?

With the belt off(as ij pointed out)
It's pretty easy to turn cams
Heck you can do it by hand
Becareful when cam snaps so you don't pinch a finger


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[jonahs_supra]

Just read you replaced cam gears
Did you removed cam caps?
If so what did you torque them down to?
You positive you installed gears correctly

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