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Discussion Starter #1
when changing timing belts on Taco's with distributorless engines or engines with the coils over the plugs , when you change timing belts or chains , you know how you have to re-set the timing? well , my question is do you have to reset the timing and if so how? or does the ECM do it for you automatically? If you remeber on the old engines with distributors, you simply loosened the distributor and rotated it around to get the right timing. Anyone know or did it?
 

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tercel89 said:
when changing timing belts on Taco's with distributorless engines or engines with the coils over the plugs , when you change timing belts or chains , you know how you have to re-set the timing? well , my question is do you have to reset the timing and if so how? or does the ECM do it for you automatically? If you remeber on the old engines with distributors, you simply loosened the distributor and rotated it around to get the right timing. Anyone know or did it?
All you have to do is get the timing belt installed correctly. There are marks on the belt that you line up with marks on the crank and cam pulleys. The ECU does the rest.

Later,
....Mike
 

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Discussion Starter #3
does anyone else have an answer, Mike , i appreciate your response.
 

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Mike is dead on..............align all the timing marks on the crank pully and cam shaft pulleys and you are good to go.
 

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just line up your cam and crank marks like mike said and you are good to go.
 

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Certainly on at least the V6 Mike is right on. The ECU gets its timing reference from position sensors on crank and cam shafts. All you need to do is make sure camshafts are indexed correctly to the crankshaft.
 

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Am I right that the 2.7 has a chain and the 3.4 has a belt?
 

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tercel89 said:
when changing timing belts on Taco's with distributorless engines or engines with the coils over the plugs , when you change timing belts or chains , you know how you have to re-set the timing? well , my question is do you have to reset the timing and if so how? or does the ECM do it for you automatically? If you remeber on the old engines with distributors, you simply loosened the distributor and rotated it around to get the right timing. Anyone know or did it?
Even if just one of the puleys moves when removing-
You basically just reset evertyhing to "Top dead center" (There are marks on the crank & cam pulleys that you can line up with other reference marks on the oil pump body & rear timing belt cover/plate)
- Once you get everything to TDC - Install the new belt and match the respective marks on the belt with the marks on the pulleys.

(Still fresh for me as I've helped change timing belts on two vehicles in the the past week.)
 

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Discussion Starter #10
ok , well i changed the belt last year on my 89 Tercel and when putting the new belt on , i think that i left just a tad bit of slack in the belt so that when i ran it , the timing was just a little retarded and i had to go back inside it and pull the belt tight.Now this was on a car that has a distributer , but what happens if you leave a little bit of slack on the newer ones with no distrbtr , cause sometimes its hard to pull the belt tight and get the proper tooth on the grove .Do the newer belts have marks you say? Could this be something to prevent what i am saying ? So whats up on the chain driven 2.7L ? i will be doing one of them in the future and wondering if it adjusts itself automatically? Thanks for the info and sorry to be confusing.
 

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tercel89 said:
, cause sometimes its hard to pull the belt tight and get the proper tooth on the grove .Do the newer belts have marks you say? Could this be something to prevent what i am saying ? So whats up on the chain driven 2.7L ? i will be doing one of them in the future and wondering if it adjusts itself automatically? Thanks for the info and sorry to be confusing.
Most of the newer vehicles have some type of spring loaded tensioner to move the idler pulleys - so you don;t have to worry about slack

-Just buy the OEM replacement belt from Toyota- Has the marks on them

As far a timing chain- I've NEVER had a need to replace one-
 

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Discussion Starter #12
thanks buddy , if and when i replace the chain on my 2.7L it will be just for precasutionary measures
 

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when you line up the crankshaft timming mark the #1 piston should be on the compression stroke
 

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Yikes...!

tercel89 said:
thanks buddy , if and when i replace the chain on my 2.7L it will be just for precasutionary measures
Replacing that chain at the stealer ('97 2.7l 4 banger 4x4) cost me about two grand. I had 'em check out a squealing sound I had. Turned out to be the belt tensioner. Told 'em to change the timeing belt (had no idea at the time it was a chain.) When they called me to authorize service, they already had the truck torn apart and told me the cost would be around $3,000.00. My nievity got me stuck, cuz it was too late. They were gonna charge me damn near the same amount just to reassemble the sonomabitch!

You probably won't EVER have to replace the chain, so don't bother if you don't have to!
 

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lesson learned

3rdidvet said:
Replacing that chain at the stealer ('97 2.7l 4 banger 4x4) cost me about two grand. I had 'em check out a squealing sound I had. Turned out to be the belt tensioner. Told 'em to change the timeing belt (had no idea at the time it was a chain.) When they called me to authorize service, they already had the truck torn apart and told me the cost would be around $3,000.00. My nievity got me stuck, cuz it was too late. They were gonna charge me damn near the same amount just to reassemble the sonomabitch!

You probably won't EVER have to replace the chain, so don't bother if you don't have to!

damn son! that's ridiculous, I'd tell em' to put that shit back together ASAP, and gimme my damn truck back. Lesson learned though, an expensive one at that. Peace, Wes
 
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