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Thread: More timing belts semour

  1. #1
    Mitsu booster
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    More timing belts semour

    As you can probably guess from my clever title that my engine is hungry for boost, fuel and timing belts. Yes timing belts. It all began when I replaced the head gasket and the belt that was on it looked good before that happened. I replace the head gasket and tighten everything up and I start it up and hear a squeak. I thought it was an accessory belt loose but after awhile it went away. I look it over after driving 30 miles and noticed the belt was stepped and there was a dusting of rubber all over the front of the motor. I pull the belt off and replace it and tighten it up to where it can deflect 1-2in and start it up and it does the same thing. I removed the tensioner completely when I pulled the head off to replace the gasket and didn't notice anything drop but is there supposed to be a washer or something between it and the block because it's riding on the outside of the tensioner and the cam cog.

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    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: More timing belts semour

    The tensioner should have a recess in it on which the belt rides.

  3. #3
    turbo addict
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    Re: More timing belts semour

    Check your crank sprocket to make sure it's bottomed out on crank. You didn't mention what year your engine is but the early blocks and common blocks used a different tensioner that moved the timing belt location. Be aware that many catalogs list the wrong tensioner. The early blocks used a shorter tensioner than the common blocks. There are other tensioners too, but they're odd ball stuff. Here is a picture of the different lengths.
    Todd
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  4. #4
    Super Moderator Turbo Mopar Staff 135sohc's Avatar
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    Re: More timing belts semour

    The center of the longest span of the timing belt (between the camshaft and intermediate shaft) you should be able to twist the belt just about 90 degrees using two fingers and not alot of force. A properly tensioned 8v timing belt is almost going to feel 'loose' compared to just about any other engine that uses one.
    1994 Shadow Sedan. 2.2 N/A, A568 400,000 miles. "the science experiment"
    1987 Shelby CSX #418. Long term rebuild and restore ?

  5. #5
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: More timing belts semour

    Quote Originally Posted by 135sohc View Post
    The center of the longest span of the timing belt (between the camshaft and intermediate shaft) you should be able to twist the belt just about 90 degrees using two fingers and not alot of force. A properly tensioned 8v timing belt is almost going to feel 'loose' compared to just about any other engine that uses one.
    That's for sure. IMO if a guy could get his hand up there comfortably, he could twist the tensioner nut by hand and tighten it down at the proper tension.

  6. #6
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    Re: More timing belts semour

    Quote Originally Posted by cordes View Post
    That's for sure. IMO if a guy could get his hand up there comfortably, he could twist the tensioner nut by hand and tighten it down at the proper tension.
    That is exactly what I do as I don't have the proper tool.
    Regards,
    Miles

    DD '87 Sundance T1, SLH with rear disks
    '87 CSX #432 2.5 CB TII, SLH

  7. #7
    Mitsu booster
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    Re: More timing belts semour

    Quote Originally Posted by 4 l-bodies View Post
    Check your crank sprocket to make sure it's bottomed out on crank. You didn't mention what year your engine is but the early blocks and common blocks used a different tensioner that moved the timing belt location. Be aware that many catalogs list the wrong tensioner. The early blocks used a shorter tensioner than the common blocks. There are other tensioners too, but they're odd ball stuff. Here is a picture of the different lengths.
    Todd
    The crank sprocket is bottomed out and I believe it's a common block. I bought the car from my boss and he had no problems with it until I took the head off to fix the gasket

  8. #8
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    Re: More timing belts semour

    Quote Originally Posted by 135sohc View Post
    The center of the longest span of the timing belt (between the camshaft and intermediate shaft) you should be able to twist the belt just about 90 degrees using two fingers and not alot of force. A properly tensioned 8v timing belt is almost going to feel 'loose' compared to just about any other engine that uses one.
    How does it work if you have the air conditioning bracket installed? Sorry for the novice questions. I'm very new to these cars

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    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: More timing belts semour

    Quote Originally Posted by mrchriswray View Post
    How does it work if you have the air conditioning bracket installed? Sorry for the novice questions. I'm very new to these cars
    Does it whine like a supercharger? I've set them that tight before and it didn't shred the belt. I didn't run it that long either though.

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    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: More timing belts semour

    Quote Originally Posted by chromguy View Post
    That is exactly what I do as I don't have the proper tool.
    Adj wrench works fantastic
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  11. #11
    Supporting Member Turbo Mopar Contributor
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    Re: More timing belts semour

    Quote Originally Posted by Force Fed Mopar View Post
    Adj wrench works fantastic
    Ah the "metric" wrench! LOL
    Regards,
    Miles

    DD '87 Sundance T1, SLH with rear disks
    '87 CSX #432 2.5 CB TII, SLH

  12. #12
    turbo addict
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    Re: More timing belts semour

    the only thing really handy about the "tool" is that it's reasonably easy to slip on the tensioner as it's like a 12 point box end wrench but with a bunch of points cut out of it so it slips on easy on most any position

    on all my 2.2's I've always set tension by sound

    the tensioner makes a cricket like chirping sound when to tight

    it just ever so faintly STARTS to make this sound as it comes into proper tension


    and yes I pull the power steering belt and tension it while running

  13. #13
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    Re: More timing belts semour

    Quote Originally Posted by cordes View Post
    Does it whine like a supercharger? I've set them that tight before and it didn't shred the belt. I didn't run it that long either though.
    It's more like a squeak and when I herd it I thought I bent valves. I pulled the coil wire before I cranked it and it was sounding fine so I hooked it up and started it and that's when I herd the belt squeak and noticed it was eating itself up

  14. #14
    Super Moderator Turbo Mopar Staff 135sohc's Avatar
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    Re: More timing belts semour

    Quote Originally Posted by mrchriswray View Post
    How does it work if you have the air conditioning bracket installed? Sorry for the novice questions. I'm very new to these cars
    A/C bracket comes off anytime I am working in that area.
    1994 Shadow Sedan. 2.2 N/A, A568 400,000 miles. "the science experiment"
    1987 Shelby CSX #418. Long term rebuild and restore ?

  15. #15
    turbo addict
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    Re: More timing belts semour

    Where does the belt ride on the cam gear? I use the "twist" method as well as observe where the belt rides. I try to get it to ride in the center.

  16. #16
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    Re: More timing belts semour

    Quote Originally Posted by Reaper1 View Post
    Where does the belt ride on the cam gear? I use the "twist" method as well as observe where the belt rides. I try to get it to ride in the center.
    The belt rides on the outside of the cam gear. I have been wondering how to get the belt in the center of the cam gear

  17. #17
    Supporting Member II Turbo Mopar Contributor A.J.'s Avatar
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    Re: More timing belts semour

    Quote Originally Posted by mrchriswray View Post
    The belt rides on the outside of the cam gear. I have been wondering how to get the belt in the center of the cam gear
    If everything is correct (proper and good pulleys and gears/sprockets) and if the belt is too tight it will walk or ride on the outside of the cam gear. That's why the tensioner tool is important. It puts the proper tension on the belt and then it rides in the center of the cam sprocket/gear. Yes it can be done without the tool but you are guessing. Yes people have done it and got the proper tension but they were lucky at guessing.

  18. #18
    Mitsu booster
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    Re: More timing belts semour

    Where can you get this tool at?

  19. #19
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: More timing belts semour

    They're a littl harder to find these days. I looked one up for someone a while back. I'll see if I can find it.

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