Spring plate sag - BMW Luxury Touring Community
 
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post #1 of 6 Old Mar 10th, 2014, 3:24 pm Thread Starter
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Spring plate sag

Here's a pic I just took of the new (left) and old (right) spring plates. Old one had 97,000 miles and 13 years on it. I was actually expecting more sag than I see. Would be interesting to be able to measure the difference in spring tension between the two, but I don't have the means.
Just thought it was interesting.
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post #2 of 6 Old Mar 10th, 2014, 4:19 pm
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Re: Spring plate sag

that is quite substantial altho strength is the most critical, anytime I have changed a clutch in one of my cars I have always replaced the spring/pressure plate.

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post #3 of 6 Old Mar 10th, 2014, 7:14 pm
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Re: Spring plate sag

That looks impressive but not a realistic measure of spring sag since the contact point for the pressure plate is fairly close to the outer rim of the spring. But overall it does suggest that it should always be renewed with a new clutch. I did anyway even though I measured no difference in mine.

A better test would be to invert the springs and level the pressure plate on the spring and measure the distance to the reference point. That would show the sag on clutch pressure.

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post #4 of 6 Old Mar 10th, 2014, 7:15 pm
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Re: Spring plate sag

Quote:
Originally Posted by fpmlt View Post
Here's a pic I just took of the new (left) and old (right) spring plates. Old one had 97,000 miles and 13 years on it. I was actually expecting more sag than I see. Would be interesting to be able to measure the difference in spring tension between the two, but I don't have the means.
Just thought it was interesting.
That seems pretty substantial. Is there a BMW spec for the spring height?

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post #5 of 6 Old Mar 10th, 2014, 7:55 pm Thread Starter
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Re: Spring plate sag

I haven't seen any specs.
Really the only reason for posting this so that some other dumbass, such as myself, will just replace it the first time and not have to go through all this again.
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post #6 of 6 Old Mar 11th, 2014, 11:26 am
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Re: Spring plate sag

For me that difference looks like pretty big!

Born to be wild so why not

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