unusual wear on apex seal?
#1
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Hi all, I've been having a go at rebuilding my Rex myself (a complete amatuer), you can read the full story over on the British owners forums here: RX8 Owners Club • View topic - Scitmon's Amateur Engine Repair and Restoration Attempt
I'm not getting much help on this thread unfortunately, so I thought I would give this website a go. So my question is, has anyone come across the strange wear that you can see here:
![Name: DABB1D6A-B673-46E4-BE9D-10D164C867F2-597-000001043170E0D9_zpsd4fb5eb0.jpg
Views: 707
Size: 58.9 KB](https://www.rx8club.com/attachments/new-member-forum-197/224144d1501214472-unusual-wear-apex-seal-dabb1d6a-b673-46e4-be9d-10d164c867f2-597-000001043170e0d9_zpsd4fb5eb0.jpg)
I'm referring to rounding on the top right of the apex seal to the right in the picture.
I'm not getting much help on this thread unfortunately, so I thought I would give this website a go. So my question is, has anyone come across the strange wear that you can see here:
![Name: DABB1D6A-B673-46E4-BE9D-10D164C867F2-597-000001043170E0D9_zpsd4fb5eb0.jpg
Views: 707
Size: 58.9 KB](https://www.rx8club.com/attachments/new-member-forum-197/224144d1501214472-unusual-wear-apex-seal-dabb1d6a-b673-46e4-be9d-10d164c867f2-597-000001043170e0d9_zpsd4fb5eb0.jpg)
I'm referring to rounding on the top right of the apex seal to the right in the picture.
#4
Thanks for the tips guys, these are actually Atkins seals that are only about 18 months old. The reason I'm breaking it down again so early is because a misfire developed, and compression on two chambers in the rear rotor was down significantly. When i lifted the rear plate, I noticed one corner piece missing. Although evidence of it being dislodged when running is not there (i.e. no significant housing or rotor damage), it would explain the unusual wear on the seal itself and the misfire i think?
The wear on the rear apex seals were around 4.5 - 4.7mm. Good advice to check the rotor groove, I will do that. Meanwhile I will be buying some more apex seals, might go for the cryo treated ones this time...
The wear on the rear apex seals were around 4.5 - 4.7mm. Good advice to check the rotor groove, I will do that. Meanwhile I will be buying some more apex seals, might go for the cryo treated ones this time...
Last edited by scitmon; 10-15-2013 at 03:14 AM.
#8
Out of NYC
iTrader: (1)
Oem seals are almost the best you can find. Most aftermarket seals are overhyped and often fail much faster than Oem. Mazda is not perfect but seriously they have way more r&d funding than most people can possibly imagine.
There are some seals out there that's better than Oem, but let's not get into that for now.
There are some seals out there that's better than Oem, but let's not get into that for now.
#10
#11
Registered
I'm gonna defer to the in-house experts on this, but conceptually, I don't see any fault with your reasoning for reusing that rotor on the basis of resurfacing that nick.
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