1977 T3. Timing chain, how long should it last? |
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gates01264
Falcone Joined: 09 Apr 2016 Location: andover Status: Offline Points: 64 |
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I personally would stick to this style of tensioner and NOT the bow type tensioner!, put it this way, would you trust something that moto guzzi has developed and have used successively for years or trust something that has been badly engineered and looks like it has been manufactured in someones shed! The reason i say the bow type tensioner is badly engineered is because of several design faults, one of which is when the bow tensioner is fitted the vertical spring on the tensioner presses hard horizontally against a lug on the engine casing causing the spring to bow, this will either fracture the tensioner spring due to it having a horizontal force placed on it or the spring will eat into the engine casing, neither of which is desirable. The other reason is the excessive tension it generates, causing excessive radial load on the oil pump which has a  small diameter shaft supported by very small needle roller bearings housed in a delicate cage, and is clearly not designed to take this amount of force, resulting in accelerated pump ware or failure! Anyway time to get off my orange box! Edited by gates01264 - 01 Jun 2016 at 22:45 |
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gates01264
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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The Spada III had a continuous whine from the timing chain with the aftermarket tensioner fitted, even tough the spring had broken. Cured when the proper late Guzzi one was fitted.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
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had my V1000 one done by Paul Harris there was a 10 degree lash in the old chain .... Guzzi ran .... doncha just love the engineering
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The Older i Get, The Better I Was
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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If Tonti had left well alone instead of penny pinching no chain related problems would or indeed could have arisen.
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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That's the style of tensioner I had. Was 2nd hand tho and could've been shagged out, the spring had no strength in it to hold a chain in place as far as I could see.
I agree with Dave I'm intrigued what was the thinking process, somehow or other sprockets and chain were cheaper than gears, most likely because can buy in the latter from a sub contractor whereas making the gears in house cost more? |
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"Chicken nuggets don't dance on a Tuesday."
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Jerry atric
Senior Member Joined: 24 Nov 2014 Location: Wiltshire Status: Offline Points: 3367 |
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I guess thats a good description of the noise I hear although not vey loud. So should i be worried? there's no audible rattle from that area. The mileage is in the high 40,000s |
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gates01264
Falcone Joined: 09 Apr 2016 Location: andover Status: Offline Points: 64 |
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You know my view on this style of tensioner and the potential damage they cause so enough said from me I think |
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gates01264
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