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BRZ Second-Gen (2022+) -- General Topics General topics for the second-gen BRZ


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Old 10-30-2021, 10:55 AM   #113
ermax
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Yay! It's here!

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Originally Posted by s30series View Post
Uhhhh, cross hatching should absolutely not wear away.

Any engine Iíve ever rebuilt goes back together with fresh hash marks but when it comes apart they arenít there. Sure you can ďseeĒ a pattern but it isnít physically abrasive anymore. I donít see how the hash marks wouldnít wear away with the rings flying past them a bazillion times. The only thing debatable is how fast they wear away.
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Old 10-30-2021, 07:20 PM   #114
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Any engine Iíve ever rebuilt goes back together with fresh hash marks but when it comes apart they arenít there. Sure you can ďseeĒ a pattern but it isnít physically abrasive anymore. I donít see how the hash marks wouldnít wear away with the rings flying past them a bazillion times. The only thing debatable is how fast they wear away.
You just said it yourself...you absolutely should see cross hatching in a cylinder bore. Just because you can't feel it with your fingers doesn't mean it's not still there..... there's a reason it exists.....
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Old 10-30-2021, 08:03 PM   #115
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Also provide strict instructions for nobody to drive the car. Since it will be one of the first at the dealership you wouldnít want anyone else to test drive it.
If the car is already sold they shouldn't let people near it. The only one that should have driven it is the one who does PDI. My tS was backed into a reserved spot with a big red bow on it. They didn't wash it until I looked over it and I swear it didn't have the new car smell until after they detailed it.
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Old 10-31-2021, 12:33 AM   #116
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My dealer has a few here in Hawaii. 2 are sold; one is a demo. I got to drive the demo while I'm waiting on mine that I ordered back in July. Apparently, since I wanted WRB, it's taking forever. May be able to get a Sapphire sooner.

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Old 10-31-2021, 07:16 AM   #117
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Yay! It's here!

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You just said it yourself...you absolutely should see cross hatching in a cylinder bore. Just because you can't feel it with your fingers doesn't mean it's not still there..... there's a reason it exists.....

Good to know. Next time I rebuild an engine I will ignore the service manual and skip the dingle berries.

But yes you are right, they are there for a reason. To seat the rings during break-in. If they lasted the full life of the engine they would continue to eat at the rings.
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Old 10-31-2021, 08:29 AM   #118
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Good to know. Next time I rebuild an engine I will ignore the service manual and skip the dingle berries.

But yes you are right, they are there for a reason. To seat the rings during break-in. If they lasted the full life of the engine they would continue to eat at the rings.
Huh?

You need a new service manual if you think cross hatching's job is only to seat rings....and I hope you're just a shade tree and not a professional
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Old 10-31-2021, 11:53 AM   #119
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Huh?

You need a new service manual if you think cross hatching's job is only to seat rings....and I hope you're just a shade tree and not a professional

Iím not saying that itís the only reason. Break in is one of them though. The abrasiveness of a fresh hone drops with time. You said it yourself, just because you canít feel them with you fingers doesnít mean they arenít there. They obviously canít keep the same level of abrasiveness indefinitely. No I am not a professional mechanic but I think just about everyone with elementary level of education knows that when you rub steel over steel something is going to wear.
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Old 10-31-2021, 01:30 PM   #120
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Old 10-31-2021, 01:40 PM   #121
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Youíre doing the tear down and unboxing on YouTube right?!
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Old 10-31-2021, 04:02 PM   #122
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My dealer has a few here in Hawaii. 2 are sold; one is a demo. I got to drive the demo while I'm waiting on mine that I ordered back in July. Apparently, since I wanted WRB, it's taking forever. May be able to get a Sapphire sooner.
Iím on the big island for vacation and saw a wrb limited fresh off the truck at the Subaru Hyundai dealer near Kona.

Looked great. Later went on their website and saw they have a $1950 markup on it. Ouch.
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Old 10-31-2021, 04:05 PM   #123
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Originally Posted by Jaylyons1 View Post
My dealer has a few here in Hawaii. 2 are sold; one is a demo. I got to drive the demo while I'm waiting on mine that I ordered back in July. Apparently, since I wanted WRB, it's taking forever. May be able to get a Sapphire sooner.
WRB is a very special paint, it goes through the rally temples of the world before it gets a blessing to be applied..

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Old 10-31-2021, 07:57 PM   #124
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I’m not saying that it’s the only reason. Break in is one of them though. The abrasiveness of a fresh hone drops with time. You said it yourself, just because you can’t feel them with you fingers doesn’t mean they aren’t there. They obviously can’t keep the same level of abrasiveness indefinitely. No I am not a professional mechanic but I think just about everyone with elementary level of education knows that when you rub steel over steel something is going to wear.
Right- specific tolerances are built into blueprinting a motor. The cylinder wall to ring to piston skirt tolerances are designed in mind to retain crosshatching a long as possible to help with oil flow up the wall

All I'm saying is your explanation of rings wearing away cross hatching is wrong....it should never be worn away by rings. If it is, tolerances we're too tight in a rebuilt motor and you will at some point have wall scoring with heat cycles..... especially if you get in a cold car and redline it near instantly.
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Old 10-31-2021, 08:42 PM   #125
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Can we not turn this into another thread of S30 solely being here to argue with people?
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Old 10-31-2021, 09:14 PM   #126
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Can we not turn this into another thread of S30 solely being here to argue with people?
Agreed!
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