Another Master Cylinder Reservoir headache thread, Hose fittings would have been nice, porsche |
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Another Master Cylinder Reservoir headache thread, Hose fittings would have been nice, porsche |
betz |
Oct 22 2020, 10:14 AM
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#1
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Member Group: Members Posts: 76 Joined: 22-October 18 From: San Leandro, CA Member No.: 22,593 Region Association: Northern California |
I did a lot of searching but none really have quite the same issue I'm having.
So I installed a new master cylinder a while back, wrestled around with the reservoir flared fittings into the grommets, etc etc, finally got it in somehow. FYI- this is a URO parts master cylinder. I am wary of URO parts not always being the best quality but the @UROpartsman seems to stand behind their products and makes revisions based on feedback so I trust it well enough. So anyways, got it installed, but it was leaking just small little drops from the reservoir fitting towards the front of the car. Enough to drain the reservoir overnight. Did some searching and saw that many people forget the washers. But also see the Uro master cylinder has them pre-installed as of a recent revision. I take the safe road and buy a couple of washers, right part number genuine porsche. Pull out my master cyl again, pull out the grommets, of course it already had washers in there. Since I got this far I replaced the washers anyways, and reinstall everything. NOW, it doesn't drip drop. It's a constant stream, leaking like a sieve. Front fitting again, the back one if it leaks, doesn't leak nearly as much. I wrestle with the fittings even more and may have gotten it down to a profuse drop. But the fittings were pushed all the way into the cylinder as far as I could tell! No amount of wrestling got them any further. And I was pushing into it pretty hard. Seems like maybe the angle had an effect on how much it was leaking. But is it really to the point that you need to just get them in just perfect or else it will leak? Seems like normal driving could move it around. I would think it's just, if it's in it's in. My solution for now is I guess I'll buy new grommets? I'm just wondering if there's any case that that the flare fitting is only partially seated, or did I just wrestle with it too much and somehow damage the grommets? How can I tell it's seated? Anyways I got some Ate brand grommets on the way since that's the only thing I could think of causing the leak. Would appreciate any insight, thanks. |
UROpartsman |
Oct 26 2020, 04:15 PM
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#2
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Member Group: Members Posts: 292 Joined: 22-October 15 From: Simi Valley, CA Member No.: 19,288 Region Association: None |
Edit: The master cylinder on the right (with the surface rust) looks like ours up until we released our second-gen unit about two years ago.
Just grabbed one of our second-gen Master Cylinder 911 355 012 02 off the shelf (which we've been selling since early 2019), here's a photo. Attached thumbnail(s) |
betz |
Oct 26 2020, 04:44 PM
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#3
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Member Group: Members Posts: 76 Joined: 22-October 18 From: San Leandro, CA Member No.: 22,593 Region Association: Northern California |
Not sure what that rusty master cylinder on the right is, unless it's a very old one of ours. We'll see if we have any photos of the units from our first run. Just grabbed a URO Parts 911 355 012 02 unit off the shelf, here's a photo. I ordered it from Auto Atlanta on Nov 19th, 2018. Screenshot of order below. I'm really trying to stay impartial here but I can clearly see they are still different. I happen to be a registered PE mechanical engineer, I feel like I am at least decently qualified to judge it for myself. You can see the "1" casting on the bottom of the newly revised Uro master, and the 914rubber master has a bump in the casting for the channel going into the "F" and "R" brake lines. The holes for the 914rubber master for the reservoir is also offset from the casting. None of these indicate performance, rather that they are just different and it is not a blatant copy. The Uro I have is a little rusty just because It's been out in the elements while the 914rubber one is brand new. I can assure you the Uro master was plenty shiny when I first got it. (IMG:http://www.914world.com/bbs2/uploads_offsite/i.imgur.com-22593-1603752260.1.jpg) |
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