Hercules
Veteran Niva Petrol Head
Lada - your peace of mind to take on the world's vast landscapes.
Posts: 785
Location: Gauteng
Town: Benoni
Registered: Oct 2, 2009 11:55:41 GMT 2
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Post by Hercules on Oct 30, 2010 20:38:44 GMT 2
Something everybody must keep in mind when adjusting timing chain tension, is to look and see that the pin adjusting the chain tension must still stand out or at least flush with the housing when the tension is adjusted. If the pin going inside the housing it is an indication that the tensioner shoe is worn to an extend where it needs replacing.
Driving with a worn tensioner shoe can cause the shoe to brake and the chain slip and damage the valves or even the head.
Also when the shoe is worn, the spring inside the tensioner has no tension to keep the chain as the travel on the tensioner pin is too large for the spring to still have any tension.
Regards.
Hercules
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Post by Charles on Oct 30, 2010 20:44:25 GMT 2
Hi Herculeus
Where is that pin? On the outside of the head?
Charles
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Hercules
Veteran Niva Petrol Head
Lada - your peace of mind to take on the world's vast landscapes.
Posts: 785
Location: Gauteng
Town: Benoni
Registered: Oct 2, 2009 11:55:41 GMT 2
Karma: Exalt | Smite
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Post by Hercules on Oct 30, 2010 20:50:40 GMT 2
Hi Charles.
The pin is in the inside of the tensioner. If you take the cap of to adjust the chain tension, the pin is sticking out of the chain tensioner housing. If the shoe is new the pin sticking out about 5mm.
Regards.
Hercules
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Post by Charles on Oct 30, 2010 21:04:36 GMT 2
Stupid question, is there a cap over it. So it just screws off? So when its off you can just adjust it like on baxters? I wanted to screw it off but was afraid i might break it. Do you know why does it have the cap on?
Charles
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Post by Ari Bezuidenhout on Oct 30, 2010 21:07:31 GMT 2
The cap squeezes the pin to hold it in position and then oil pressure can add some extra tension, that is why you remove the cap , turn the engine and replace the cap, nothing is adjusted at the tensioner.
Ari
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Post by Charles on Oct 30, 2010 21:22:58 GMT 2
So i must remove the cap completely?
Charles
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Post by Ari Bezuidenhout on Oct 30, 2010 21:51:41 GMT 2
Only till it feels loose .
Ari
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Post by marius on Oct 30, 2010 21:57:45 GMT 2
Hi Charles
Just loosen the cap a couple of turns. Do the adjustment as in the manual and retighten the cap.
Regards Marius
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Post by ronnie on Oct 30, 2010 22:02:10 GMT 2
Hi Charles
When you adjust the tension it is not necessary to remove the cap, just loosen it and give it a tap. When you loosen it you are merely releasing the Collets which lock it in place. The light tap with a hammer makes sure the collets are loose.
Ronnie
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Post by Charles on Oct 30, 2010 22:23:41 GMT 2
Ok thanks guys. Wil do it monday. i think i wasnt loosening it enough the whole time.
Charles
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Post by Charles on Nov 5, 2010 13:36:12 GMT 2
Will it be ok if my timing chain is very tight. So tight I cant even move it forwards and backwards on the camshaft gear?
Charles
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Post by Ari Bezuidenhout on Nov 5, 2010 15:36:46 GMT 2
As it heats up it will get longer so yes it should be ok
Ari
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Post by Charles on Nov 5, 2010 15:55:22 GMT 2
Ok that makes sence. At least now I know the chain will be quiet.
Charles
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Post by ronnie on Nov 5, 2010 16:15:09 GMT 2
Hi Charles I said to you mine was very tight as well. If you adjust it by the book you can`t go wrong. If every thing gets bigger with heat the gears will also get bigger and the tension will stay the same? Ronnie
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Post by danie on Nov 5, 2010 18:07:30 GMT 2
I have posted Ahma's Youtube link at another thread - which shows how the tension gets adjusted when the front cover has been removed.
This is the link (again) - for easier reference in future :
Danie
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Post by ronnie on Nov 5, 2010 18:34:00 GMT 2
Hi Danie After watching the video my chain looks just as tight. . A thought, why can`t the chain be adjusted with the motor running?. I can see no reason for this not to work. I await your reply ;D ;D ;D Ronnie
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Post by Ari Bezuidenhout on Nov 5, 2010 18:51:22 GMT 2
Hi Ronnie
Because it gets hot and then the oil pressure tensoining part will take up some of the slack.
Ari
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Post by danie on Nov 5, 2010 19:19:52 GMT 2
A thought, why can`t the chain be adjusted with the motor running?. I can see no reason for this not to work. I await your reply ;D ;D ;D Hi Ronnie I am not brave enough to try this - just remember the tensioner bolt needs to be loosened slightly before the crankshaft gets turned clockwise. I guess when the engine turns at speed, and the tensioner bolt is loose, there is a possibility that things could get out of control . Regards Danie
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Post by Charles on Nov 5, 2010 19:29:40 GMT 2
I adjusted mine by pushing the shoe froward with a screw driver and then tightened the bolt.
Charles
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Post by marius on Nov 5, 2010 19:40:11 GMT 2
Hi Ronnie
If you try that you're very likely to cause damage on either/or the chain and the teeth - so don't try it ;D
Regards Marius
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Post by ronnie on Nov 5, 2010 21:10:53 GMT 2
Hi Danie and Marius There are not many brave people around ;D. I was studying the manual and if the motor was running when the tensioner nut was loosened, in theory the slack would be at the tensioner shoe as the crank is pulling the chain and it should adjust as normal and "hopefully" be correct when the nut is then tightened. Perhaps some one will be brave enough to try this sometime Ronnie
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Post by marius on Nov 5, 2010 21:17:07 GMT 2
Hi Ronnie Rather be safe than sorry
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Post by ronnie on Nov 5, 2010 21:21:54 GMT 2
Hi Marius I am not one of the brave ones Ronnie
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Post by Charles on Nov 6, 2010 11:26:06 GMT 2
Ronnie if you will borrow me your lada if it fails i will try it.
Charles
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Post by ronnie on Nov 6, 2010 13:30:09 GMT 2
Hi Charles You are the mechanic and should know if this is possible ;D ;D ;D I was hoping Ventz would comment on this one Ronnie
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Hercules
Veteran Niva Petrol Head
Lada - your peace of mind to take on the world's vast landscapes.
Posts: 785
Location: Gauteng
Town: Benoni
Registered: Oct 2, 2009 11:55:41 GMT 2
Karma: Exalt | Smite
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Post by Hercules on Nov 6, 2010 17:11:42 GMT 2
Hi Ronnie.
Personally I will not try it as all the slack on a loose chain occurs between the crank gear and tensioner shoe. If there is enough slack the chain will slip over the crank gear and gone is the valves. That is what basically happens when the tensioner shoe broke.
I keep with the original style of adjusting the tensioner.
Regards.
Hercules
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Post by Charles on Nov 6, 2010 17:57:24 GMT 2
Ronnie I think chances are 99% that this will stuff up the motor.
Charles
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Post by ronnie on Nov 6, 2010 18:23:59 GMT 2
Hi Charles and Hercules
You are probably correct, and I am not about to try.
Ronnie
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Post by marius on Nov 6, 2010 18:28:00 GMT 2
Too costly to even consider doing that - AND it would be a safety issue adjusting with the fan running close by - esp mine as it has no cover.
Stick to the manual here.
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Post by ronnie on Nov 6, 2010 18:40:44 GMT 2
Hi Marius
Why has it no cover as I assume they all had when new. Mine also had no shroud when I bought it.
Ronnie
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