HELP Timing belt (Disaster?)

TRDCal said:
Can either of you elaborate on this...I've done a few Subaru timing belt changes. 99.9% sure I put the arrows towards the timing marks and haven't had issues yet. Heck for the first one I followed a well regarded DIY thread from a Subaru forum and there was no mention of which way to put the marks. If the belt is symmetrical, I don't why it would make a difference.

EDIT: I guess Subaru uses a line to mark the belt as opposed to an arrow. Still curious tho, are Toyota belts not symmetrical?
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I'm guessing so since its something they mention and a lot of technicians have gotten bitten before by? The belts being non-symmetrical were the only thing I could come up with as well.
 
BlackWorksInc said:
I'm guessing so since its something they mention and a lot of technicians have gotten bitten before by? The belts being non-symmetrical were the only thing I could come up with as well.
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I guess it make sense the way the belt might be designed to rotation is a certain direction. It would make more sense then to mark a direction of rotation as opposed to arrow pointing fwd/aft
 
TRDCal said:
Can either of you elaborate on this...I've done a few Subaru timing belt changes. 99.9% sure I put the arrows towards the timing marks and haven't had issues yet. Heck for the first one I followed a well regarded DIY thread from a Subaru forum and there was no mention of which way to put the marks. If the belt is symmetrical, I don't why it would make a difference.

EDIT: I guess Subaru uses a line to mark the belt as opposed to an arrow. Still curious tho, are Toyota belts not symmetrical?
Click to expand...

I can't remember 100%, but I do believe that the belt is 1 or 2 cogs "longer" on the lagging side (passenger side) when installed (with arrows out). My guess is that since the tensioner is on this side that it is a bit longer there to account for the mechanism. Remember, gears don't care about belt symmetry, just ratios.
 
TRDCal said:
I guess it make sense the way the belt might be designed to rotation is a certain direction. It would make more sense then to mark a direction of rotation as opposed to arrow pointing fwd/aft
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belt marks are completely redundant, if you are using actual timing marks.

I don't trust the belt marks, I go by the cam/cranks marks, and disregard the belt marks completely.



to the OP, it sound like something electrical, if it was mechanical(belt) you would know, as it would have made some pretty terrible noise when it died.
im guessing a connector came loose. likely a cam sensor.

also, its very unlikely that the belt would "slip" after running for a bit, and not immediately. they don't really work like that.
 
nevada said:
.....

to the OP, it sound like something electrical, if it was mechanical(belt) you would know, as it would have made some pretty terrible noise when it died.
im guessing a connector came loose. likely a cam sensor.

also, its very unlikely that the belt would "slip" after running for a bit, and not immediately. they don't really work like that.
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I agree, it sounds electrical to me as well…

To OP: I would look close at the left cam sensor wire and make sure is properly routed and not got ripped out by the Timing Belt;
 
UPDATE: Problem is fixed and 4runner is running good as new. When I was doing the job apparently the Cam Sensor wire got pinched and it caused a short, after some wiring work with my buddy the 4runner started right back up and all is well. Thanks everyone for the help and insight! Greatly appreciated!
 
derekdevasia said:
UPDATE: Problem is fixed and 4runner is running good as new. When I was doing the job apparently the Cam Sensor wire got pinched and it caused a short, after some wiring work with my buddy the 4runner started right back up and all is well. Thanks everyone for the help and insight! Greatly appreciated!
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That's what I figured. I had it happen to me, but the truck wouldn't start the first time. You should have seen the look on my face, it was my first attempt at a timing belt change in a 3RD generation. I turned the key and nothing, nada, zilch. IT's funny now but it wasn't funny at the time. I'm glad you got it repaired.

JR
 
jreask said:
That's what I figured. I had it happen to me, but the truck wouldn't start the first time. You should have seen the look on my face, it was my first attempt at a timing belt change in a 3RD generation. I turned the key and nothing, nada, zilch. IT's funny now but it wasn't funny at the time. I'm glad you got it repaired.

JR
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You should have seen my face when the truck started and ran and it it shut off when i was reving it. Man I thought i screwed up everything haha but yes super glad it was a pretty simple fix.
 
Sounds like your timing is correct if it ran for 5 minutes. Your problem may be your accy belt rubbed against your camshaft position sensor and cut the wire. Take a close look at that.
 
I'm sorry but I'm new to this forum talk. I just saw your post that you found your problem. Glad it was that simple. I've been a Lexus/Toyota tech for 17 years and have seen several vehicles towed in for that exact reason.
 
Lextech said:
I'm sorry but I'm new to this forum talk. I just saw your post that you found your problem. Glad it was that simple. I've been a Lexus/Toyota tech for 17 years and have seen several vehicles towed in for that exact reason.
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Welcome to the forum! The more the merrier! :)
 
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