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 piston rings 
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Agony Aunt - You have a car problem? Speak to Ken

Joined: March 6th, 2009, 1:40 am
Posts: 3611
Post Re: piston rings
Yes, if it's only the rings which have been replaced.
That process of repeatedly accelerating (and decelerating) ensures that the rings are pressed tightly against the cylinder walls.
Driving with a light throttle runs the risk of glazing.
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https://www.hastingsmfg.com/ServiceTips ... cedure.htm


vitor wrote:
Ken, I'm not sure I understood the instructions...
Should I need just 160 kms to do the running-in?

.

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December 16th, 2018, 3:15 pm
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Firing on two.

Joined: February 10th, 2009, 10:12 pm
Posts: 152
Location: viseu - PT
Post Re: piston rings
Thanks, Ken.
So will it be safe (for the engine, not for me :) ) to drive at 120Km/h?


December 22nd, 2018, 1:31 pm
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Firing on two.
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Joined: March 21st, 2013, 12:04 am
Posts: 640
Location: Exeter, Devon
Post Re: piston rings
120 k/h
:lol:

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If you can't fix it with a hammer, it's probably electrical (or, an electric fuel pump!) ....


December 22nd, 2018, 1:43 pm
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Firing on two.

Joined: February 10th, 2009, 10:12 pm
Posts: 152
Location: viseu - PT
Post Re: piston rings
Believe it or not, without front wind, on a slight descending road, it drives at that speed, on GPS. On the car I can read 125.
Of course this won't happen for a long time, or else the car would disintegrate... :D but before that happened, I would die of fear :)

(PS: it is a 652 engine, running on LPG)


December 22nd, 2018, 2:05 pm
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2CV Fan

Joined: April 20th, 2017, 10:55 pm
Posts: 87
Post Re: piston rings
I saw 75mph on my Ami 8 on the M6, just before the front offside tyre blew. They will do it with a little help from gradient. Lumps of rubber flying skyward, a rumbling from the front, and complete steering control. Onto the hard shoulder and change wheel. It was a Michelin, but how old I know not.


December 23rd, 2018, 12:42 pm
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Firing on two.

Joined: February 10th, 2009, 10:12 pm
Posts: 152
Location: viseu - PT
Post Re: piston rings
Don't get me wrong - 120 km/h is never my everyday speed.
Indeed the comfortable and safe speed for a 2cv, in my opinion, is 80km/h.
The noise is not too much (you might even listen to the radio :D ) and you feel the engine is not making a supreme effort...


December 23rd, 2018, 2:06 pm
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Firing on two.
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Joined: August 8th, 2012, 11:00 am
Posts: 311
Location: Korpilahti, Finland
Post Re: piston rings
Derek wrote:
I saw 75mph on my Ami 8 on the M6

107 mph with my Dyane...

...by "little tuned" Visa engine with longest GS gearbox... Yes, it was very fun...


December 23rd, 2018, 9:16 pm
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