Solid tensioners adjusting...

[levdeb]

I've decided to put the solid tensioners back in my 2.2. Is there a standard adjustment other than the "tight but not too tight" advice?

Any help would be appreciated!


Thanks,
Bill

[Eagledriver]

There really is no answer to this. The tensioners will be too loose when the engine is cold and too tight when the engine is hot. If you make them tight the chains will just wear that much faster. If you make them loose the chain will rattle. This is why they are not a proper chain tensioner.

-Andy

[Flat6pac]

Thats all there is because the chain will grow about 3/8 inch in 100 degrees so youre no longer compensation with the cold tightness.
I dont advocate Carrera tensioners but reg hydraulics with guards are really the answer, far surpassing the solid tensioner
Bruce

[levdeb]

Thanks guys. My father in law bought his 1970 911T new from the dealership. About a year later, they "recalled" the car and put solid tensioners in it. He's been daily driving it every day since. Of course, every tuneup includes checking the tension. That pretty much sold me.

[ix0ifan]

Originally Posted by Flat6pac

the chain will grow about 3/8 inch in 100 degrees

Seems a bit excessive

Sorry to have to use a metric system but it is just a bit easier for me to do the sums.

3/8" is about 9.5mm.

Thermal expansion coefficient for ferritic steel is 11 x 10^-6 per deg C or 6.1 x 10^-6 per deg F

I thinks this means the chain would need to be around 15 metres long to expand by this amount in 100 degF

Surley the problem is that the magnesium expands 21 x 10^-6 and aluminium is not too much different.

There must be a figure for the correct cold tension that could be measured with a spring balance that someone may know.

[philippeF]

Hello
If i remember right

Mike (?) from MBengineering knows about that, He kindly gave me an information long time ago, i'll try to find it
regards
Philippe (metric too )

[levdeb]

That would be great! Thanks Philippe!