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Old 10-17-2017, 07:49 PM   #121
OldNuc
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1998 SC2
Default Re: Starting to get into all the small details

I suspect there were some engines assembled with the heavy crank and windage tray initially until the error was discovered.

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Old 10-17-2017, 08:05 PM   #122
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Default Re: Starting to get into all the small details

Yikes, hope my motor goes the distance. I've driven it pretty hard for the last 130,000 miles! The black stuff is moly engine assembly lube. I forget which brand.

...
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Old 10-17-2017, 08:21 PM   #123
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Default Re: Starting to get into all the small details

I suspect it is a very rare failure. Not something I would worry about unless you were planning on racing the car and that is probably where the issue shows up.

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Old 10-21-2017, 01:46 AM   #124
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Default Re: Starting to get into all the small details

Just to update, got the Pistons today.

Will bring them to m s Monday. Hope to get answers on that crankshaft.

A few more parts came in, gaskets (most didn't survive, they were the RA clearance felpro) and head bolts.

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Old 10-23-2017, 09:52 AM   #125
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Default Re: Starting to get into all the small details

Waiex I'm so grateful you brought that topic up.

Called m s today to let him know I'm sending Pistons over. I kinda felt bad asking him if he knows what a plateau finish is. He said he did and then went into great detail about how they're moly coated rings and if it's not, the rings can break and cause problems. That's a plus, he's done his homework by the sounds of it.

So..... This m s guy sent both cranks out of town to where they grind them. (same company). Here's what happened there. The cutter machinist didn't feel good about the scuffing at the end of the shaft, for balancing reasons so he cut the original down for a total of .50 mm.
I
Looks like I'm stuck with it but if it's any consolation, I'm not gonna be racing it.

Question. Anybody have this extra support (for crank) for sale? I could go to j/y once they reopen their doors and snag one. I've never dealt with this so what do I need to know? Tty bolts? Special tools? Etc.

Or should I just send it?

...
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Last edited by spacetrace33; 10-23-2017 at 10:01 AM..

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Old 10-23-2017, 02:40 PM   #126
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Default Re: Starting to get into all the small details

Whoa! The crank was scuffed on its snout, where the belt pulley fits? So they cut the crank there .020" smaller in diameter? Do you/they have an undersize pulley to mate with it? If not, the crank is now junk, or has to be welded/ground back to size.

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Old 10-23-2017, 04:03 PM   #127
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Default Re: Starting to get into all the small details

Whoa. Let's go back a chapter and get on same page. 😂

Short version of story is

I'm going to be using the heavy crank with .50mm undersize bearings.

I was bummed they didn't wanna touch the other one because of the snout.

Should I run it or get the right girdle?

If get the right girdle, anything special I need to know or get also. I know nothing of significant detail.

...
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Old 10-23-2017, 08:28 PM   #128
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Default Re: Starting to get into all the small details

OK, got it now. The bearing journals were ground, not the snout. Sorry if I sounded over-dramatic, but I would rather speak up than have a possible error slide by.

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Old 10-23-2017, 08:44 PM   #129
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Default Re: Starting to get into all the small details

Haha Bill. Don't apologize. Thanks for looking out.

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Old 02-01-2018, 05:28 PM   #130
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Default Re: Starting to get into all the small details

Ok. So just updating since it's been a while. Got the bottom end done. I did plasigauge every bearing. While the numbers are written in the garage, and I'm not there, they were on the high side, but still within spec.

The rotating assembly moves harder than it did before; no binds. Checked for visual play as well. Noticed some side to side play with the rod/caps. If I read it correctly, max play allowed is .017. I'm below that. Can't get a .017 feeler gauge in there when "pushed" all way to one side. One rod at a time.

Thoughts? This is where I messed up last time.. Very critical now.

...
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