cam chain auto tensioner
03-02-2009, 10:33 AM
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QUOTE (loftust @ Mar 2 2009, 11:23 AM)
Search the forum for 'wormgear sandblast tct' and you'll find alot more info regarding the tensioner
Search the forum for 'wormgear sandblast tct' and you'll find alot more info regarding the tensioner
. There is a lot of knowledge on this site. Thanks for that info loftust, it looks just what i want - im on with reading it now... thanks again!
03-02-2009, 11:08 AM
#13
Originally Posted by loftust,Mar 2 2009, 07:23 PM
Search the forum for 'wormgear sandblast tct' and you'll find alot more info regarding the tensioner.
don't buy a new tct just sandblast the adjuster thread
03-04-2009, 03:54 PM
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03-05-2009, 12:18 AM
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For the Nth time:
The TCT works by using oil Px (Spring assisted at low RPM) as eloquently put by our learned colleague, sw20danno.
If you are experiencing rattling at idle and can cure it by fitting a new spring / shimming the old one / stretching the old one then great!
If you are getting rattly noises at higher RPM (ie when it's on Oil Px only) then you need a new TCT.
If a new TCT still leaves you with a rattle then it is probable that either the plastic guide (that the TCT uses to push the chain) or the chain itself is worn.
To check this, I would suggest that there should be a procedure that is in the workshop manual. Typically, based on other vehicles that I own, this will mean either using a "Go-No Go" guage inserted between the links (rocker cover off), or a deflection test via the TCT port. AFAICS there is no way to check the guide without having the rocker cover off and possibly the head too...
It is unlikely that your timing chain will snap, but the valve timing will be all over the shop, you may experience increased wear in valvetrain components and in extreme cases, if the chain becomes slack enough to jump a tooth or two, then you could end up with valves embedded in your pistons...
Bottom Line: If a new TCT don't fix it, take it to someone who knows what they're at. By this, I mean probably not a main dealer who will sting you for a timing chain quick as look at you, but to a good independant with S2000 experience.
The TCT works by using oil Px (Spring assisted at low RPM) as eloquently put by our learned colleague, sw20danno.
If you are experiencing rattling at idle and can cure it by fitting a new spring / shimming the old one / stretching the old one then great!
If you are getting rattly noises at higher RPM (ie when it's on Oil Px only) then you need a new TCT.
If a new TCT still leaves you with a rattle then it is probable that either the plastic guide (that the TCT uses to push the chain) or the chain itself is worn.
To check this, I would suggest that there should be a procedure that is in the workshop manual. Typically, based on other vehicles that I own, this will mean either using a "Go-No Go" guage inserted between the links (rocker cover off), or a deflection test via the TCT port. AFAICS there is no way to check the guide without having the rocker cover off and possibly the head too...
It is unlikely that your timing chain will snap, but the valve timing will be all over the shop, you may experience increased wear in valvetrain components and in extreme cases, if the chain becomes slack enough to jump a tooth or two, then you could end up with valves embedded in your pistons...
Bottom Line: If a new TCT don't fix it, take it to someone who knows what they're at. By this, I mean probably not a main dealer who will sting you for a timing chain quick as look at you, but to a good independant with S2000 experience.
03-05-2009, 07:57 AM
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Originally Posted by ian_6301,Mar 5 2009, 10:18 AM
For the Nth time:
The TCT works by using oil Px (Spring assisted at low RPM) as eloquently put by our learned colleague, sw20danno.
If you are experiencing rattling at idle and can cure it by fitting a new spring / shimming the old one / stretching the old one then great!
If you are getting rattly noises at higher RPM (ie when it's on Oil Px only) then you need a new TCT.
If a new TCT still leaves you with a rattle then it is probable that either the plastic guide (that the TCT uses to push the chain) or the chain itself is worn.
To check this, I would suggest that there should be a procedure that is in the workshop manual. Typically, based on other vehicles that I own, this will mean either using a "Go-No Go" guage inserted between the links (rocker cover off), or a deflection test via the TCT port. AFAICS there is no way to check the guide without having the rocker cover off and possibly the head too...
It is unlikely that your timing chain will snap, but the valve timing will be all over the shop, you may experience increased wear in valvetrain components and in extreme cases, if the chain becomes slack enough to jump a tooth or two, then you could end up with valves embedded in your pistons...
Bottom Line: If a new TCT don't fix it, take it to someone who knows what they're at. By this, I mean probably not a main dealer who will sting you for a timing chain quick as look at you, but to a good independant with S2000 experience.
The TCT works by using oil Px (Spring assisted at low RPM) as eloquently put by our learned colleague, sw20danno.
If you are experiencing rattling at idle and can cure it by fitting a new spring / shimming the old one / stretching the old one then great!
If you are getting rattly noises at higher RPM (ie when it's on Oil Px only) then you need a new TCT.
If a new TCT still leaves you with a rattle then it is probable that either the plastic guide (that the TCT uses to push the chain) or the chain itself is worn.
To check this, I would suggest that there should be a procedure that is in the workshop manual. Typically, based on other vehicles that I own, this will mean either using a "Go-No Go" guage inserted between the links (rocker cover off), or a deflection test via the TCT port. AFAICS there is no way to check the guide without having the rocker cover off and possibly the head too...
It is unlikely that your timing chain will snap, but the valve timing will be all over the shop, you may experience increased wear in valvetrain components and in extreme cases, if the chain becomes slack enough to jump a tooth or two, then you could end up with valves embedded in your pistons...
Bottom Line: If a new TCT don't fix it, take it to someone who knows what they're at. By this, I mean probably not a main dealer who will sting you for a timing chain quick as look at you, but to a good independant with S2000 experience.
, but most wont have a clue bud!
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