the REbuild thread - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Build Threads Building a motor? Post the progress here.

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 11-21-2015, 05:59 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default the REbuild thread

This is the documentation of my rebuild after I lost oil pressure, opened up the engine to replace the oil pump and instead discovered that one of my oil squirters had destroyed a piston, scratching a cylinder wall in the process. See carnage thread here.

As of right now, the head, rods, pistons, crank, oil pump, etc are off the block and I'm getting ready to take it to a machine shop Monday to find out what size pistons I end up needing.

Going to add double heavy valve springs, BE oil pump and one of those 949 harmonic dampers as I reassemble.

Things I'm wondering about:
1) Should I redo rod/main bearings because I have everything apart even if everything looks fine? This does seem like a good time to verify clearances are cool. I will feel kind of retarded if a spin a bearing 3 months from now and have to do this **** over again. Of course I will also feel retarded if I use the wrong size bearings or something and make things worse.
2) edit: nevermind, I see them
3) opinions on using "assembly lube" vs motor oil

Also, I learned a very valuable lesson about engine disassembly. GET AN IMPACT WRENCH. It turns hours of HNNNNGG into minutes of BRRRT.

Last edited by AlwaysBroken; 11-22-2015 at 02:27 PM.
AlwaysBroken is offline   Reply With Quote
Old 11-21-2015, 11:08 PM   #2
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

edit: image upload is working again



Everything taken out and set aside for later reassembly.




Still have to remove the bearings in the block, the head studs and the remaining oil squirters.
Attached Thumbnails
the REbuild thread-80-bottomhalf_59286fefd2040525b538804ef73893be86d288e6.jpg   the REbuild thread-80-thrust_bearings_416efa4cb5686a18345d188d843be3171511f5d4.jpg  

Last edited by AlwaysBroken; 11-22-2015 at 02:21 PM.
AlwaysBroken is offline   Reply With Quote
Old 11-24-2015, 03:11 AM   #3
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

Welp, it's at the machinist now. Updates next week.
AlwaysBroken is offline   Reply With Quote
Old 11-24-2015, 12:29 PM   #4
Ich verstehe nur Bahnhof
iTrader: (2)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 2,812
Total Cats: 224
Default

YAY
psyber_0ptix is offline   Reply With Quote
Old 11-24-2015, 12:31 PM   #5
Ich verstehe nur Bahnhof
iTrader: (2)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 2,812
Total Cats: 224
Default

Assembly lube = YES.

I did all my engine stuff with hand tools. I didn't want to much up threads or do something stupid hamfisting it with impact shenanigans. That's an excuse for me not having any powered tools other than an angle grinder.
psyber_0ptix is offline   Reply With Quote
Old 11-24-2015, 12:41 PM   #6
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 15,170
Total Cats: 972
Default

Quote:
Originally Posted by psyber_0ptix View Post
Assembly lube = YES.

I did all my engine stuff with hand tools. I didn't want to much up threads or do something stupid hamfisting it with impact shenanigans. That's an excuse for me not having any powered tools other than an angle grinder.
My impact wrench never leaves the lefty loosey setting. Thats just asking for me to break something.
aidandj is offline   Reply With Quote
Old 11-24-2015, 12:48 PM   #7
Ich verstehe nur Bahnhof
iTrader: (2)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 2,812
Total Cats: 224
Default

I had no success removing pistons with an angle grinder. I just didn't want to say anything because I didn't want Fae to laugh at me.
psyber_0ptix is offline   Reply With Quote
Old 12-01-2015, 04:17 PM   #8
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

edit: valuable lesson learned, always go talk to the machinist in person. Explaining over the phone was a train wreck. In person, everything made sense and he could just show me what he was talking about.

New plan:
1) Rough bore to see how deep the scratch is, then he'll tell me the new size so I know what size pistons to get.
2) Looks like there are little ridges around the edges of the main bearing surfaces, which he wants to bore hone away so that the little ridges don't collapse after I put the bearings in and change my clearances or let the bearings settle at an angle. He said that if I wanted to switch to arp main studs, he'll do it after I get them in.

So that's pretty much it for the next week or so.

Last edited by AlwaysBroken; 12-02-2015 at 11:03 AM.
AlwaysBroken is offline   Reply With Quote
Old 12-09-2015, 05:53 PM   #9
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

Just heard back and 84.5mm pistons and ARP main studs shall be ordered. I'm going to bring by my crankshaft to have it miced and then order bearings as well.

I have double heavy valve springs and a set of valve seals on the way already. I'm going to drop the 99 head off for a rebuilding as soon as it all arrives.

So it's looking like I should have everything (give or take pistons... edit: ooh nevermind, looks like wisecos sometime next week) ready to reassemble by the end of the month.

Last edited by AlwaysBroken; 12-09-2015 at 06:32 PM.
AlwaysBroken is offline   Reply With Quote
Old 12-09-2015, 07:19 PM   #10
Ich verstehe nur Bahnhof
iTrader: (2)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 2,812
Total Cats: 224
Default

are you keeping oil squirters or ditching them? curious
psyber_0ptix is offline   Reply With Quote
Old 12-09-2015, 07:26 PM   #11
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

Ditching them as soon as I find a fastener of the appropriate length to plug the hole.

They're a bandaid for running cast pistons with a turbo on a low boost setup. I just don't see the benefit to keeping them. I'm open to counter-arguments but the topic has pretty much been done to death with nearly everyone reporting improvements in oil temps, oil consumption and oil pressure. Add in the ability to torque them down a bit harder without breaking anything, and it seems like a non-brainer given the cause of this rebuild.
AlwaysBroken is offline   Reply With Quote
Old 12-09-2015, 07:30 PM   #12
Ich verstehe nur Bahnhof
iTrader: (2)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 2,812
Total Cats: 224
Default

i'm stuck with mine in, i hadnt thought of it during my build :\

i thought a benefit was a cooler piston which might help further prevent detonation. As far as oil temps, I think an oil cooler is in my future, but oil pressure wouldn't really be that big a concern if upgrading a pump w/ shim
psyber_0ptix is offline   Reply With Quote
Old 12-09-2015, 07:39 PM   #13
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

Eh, I wouldn't stress over it, since my car was fine for over 10 years with them and I never noticed the problems others have complained about. Unless yours fall out, it will probably never be an issue. I still have no idea why one of mine came out after so long. With me upgrading the oil pump anyway, it's probably massive overkill to seal the sprayers.
AlwaysBroken is offline   Reply With Quote
Old 12-09-2015, 07:39 PM   #14
SOMEOFIT
iTrader: (1)
 
Girz0r's Avatar
 
Join Date: Jun 2014
Location: Austin, TX
Posts: 2,569
Total Cats: 224
Default

Quote:
Originally Posted by AlwaysBroken View Post
Ditching them as soon as I find a fastener of the appropriate length to plug the hole.
Quote:
Originally Posted by bbundy View Post
I found engine temps coolant and oil were much more stable and cooler without the squirters. Waste combustion heat goes out the tailpipe instead of into your engine cooling system and the turbo loves that.
Quote:
Originally Posted by Savington View Post
If they had half a brain, they put short M10x1.25 bolts and crush washers in. Redrilling and tapping for pipe thread would be an awful idea on several levels.
Copper crush washers.

Last edited by Girz0r; 12-09-2015 at 07:57 PM.
Girz0r is offline   Reply With Quote
Old 12-10-2015, 01:16 AM   #15
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

I already have copper crush washers. I am probably going to get some 10x1.25x20mm fasteners and grind them down to 10mm.
AlwaysBroken is offline   Reply With Quote
Old 12-11-2015, 05:05 PM   #16
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

84.5mm wisecos on the way.
ARP mains on the way.

edit: ooh, wife called- double heavy valve springs just arrived.

Last edited by AlwaysBroken; 12-11-2015 at 06:16 PM.
AlwaysBroken is offline   Reply With Quote
Old 12-21-2015, 11:54 PM   #17
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

Head got finished in like 2 days. Wooo!
Pistons got drop shipped to the wrong address. Fuuuuu.
AlwaysBroken is offline   Reply With Quote
Old 12-22-2015, 08:37 AM   #18
Ich verstehe nur Bahnhof
iTrader: (2)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 2,812
Total Cats: 224
Default

TTIWWOP of parts, cats, wife
psyber_0ptix is offline   Reply With Quote
Old 12-22-2015, 12:59 PM   #19
Junior Member
Thread Starter
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 469
Total Cats: 12
Default

You aren't getting wife or cat pics. Have a picture of a dog sitting next to a cylinder head instead. BTW, the quick reply function is broken.
Attached Thumbnails
the REbuild thread-80-head_and_dog__dd79874bb59718941e639e479c158cf4eceefed5.jpg  
AlwaysBroken is offline   Reply With Quote
Old 12-22-2015, 01:13 PM   #20
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 15,170
Total Cats: 972
Default

That's a weird looking cat
aidandj is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OIL LINE: swapping VVT head for a BP-4W MAZDAZE Engine Performance 12 12-15-2015 10:04 AM
Wide Band and Oil Pressure Gauges Adam777 Miata parts for sale/trade 7 12-04-2015 11:00 AM
Which Pistons to use? JustThisGuy Engine Performance 25 11-20-2015 06:13 PM
Water/Oil Problems MeOtter DIY Turbo Discussion 40 11-18-2015 09:20 AM
Advanced Auto Sports Oil pressure sending unit relocation kit tomiboy Miata parts for sale/trade 4 11-17-2015 02:04 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 08:16 PM.