crank & rod bolts reusable? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 07-07-2009, 07:47 PM   #1
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default crank & rod bolts reusable?

Got all the parts for a complete 1.6 rebuild, new pistons and some ARP head studs and even a new crank pulley bolt but i totally forgot about the rod and crank bolts

I tried looking around for some answers but none.

So are the crank and rod bolts reusable?
railz is offline   Reply With Quote
Old 07-08-2009, 12:37 AM   #2
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

1. Why are you building a motor with stock rods
2. don't re-use the rod bolts
3. re-use the mains

I replacedal hardware due to the wonderful world of cost/benefit. $100 for new main bolts could help me drive home from the track.
hustler is offline   Reply With Quote
Old 07-08-2009, 02:11 AM   #3
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

1. im not boosting past 12, if anything im very satisfied with what i have now,10psi.

2.^^^

3. so main/crank bolts are reusable?
railz is offline   Reply With Quote
Old 07-08-2009, 03:11 AM   #4
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,382
Total Cats: 43
Default

Honestly I wouldn't use those stock rods either, but yeah.. You can reuse the rod bolts and the main bolts. I wouldn't recommend reusing the crank snout bolt however.

Wouldn't kill ya to get some ARP rod bolts though..
elesjuan is offline   Reply With Quote
Old 07-08-2009, 03:25 AM   #5
Elite Member
iTrader: (15)
 
Join Date: Sep 2007
Location: Incline Village, NV
Posts: 2,073
Total Cats: 5
Default

jeez crist man, 300 bucks and it will be pretty damm strong. Screw the stock rods, wait another paycheck and get them. Even at 10-12 psi it something you should consider.
thesnowboarder is offline   Reply With Quote
Old 07-08-2009, 03:43 AM   #6
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

yeah i know, stock rods are no no, but i drove like 4hrs to pick up a complete 1.6 rebuild kit a few months ago and the dude had the pistons press fitted and mounted so cant get new rods.

The next motor i have sitting in the garage will be fully built in a fewwwww months but i need a fresh for now, my current is really old and shady
railz is offline   Reply With Quote
Old 07-08-2009, 04:08 AM   #7
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

There is no possible excuse for using stock rods in a motor build. None. I don't care if God himself installed them. You take them out, get Belfabs, and put them in. It's retarded not to.
Savington is offline   Reply With Quote
Old 07-08-2009, 04:15 AM   #8
Senior Member
iTrader: (13)
 
Join Date: Jul 2008
Location: Macon, Ga
Posts: 826
Total Cats: 0
Default

Quote:
Originally Posted by railz View Post
yeah i know, stock rods are no no, but i drove like 4hrs to pick up a complete 1.6 rebuild kit a few months ago and the dude had the pistons press fitted and mounted so cant get new rods.

The next motor i have sitting in the garage will be fully built in a fewwwww months but i need a fresh for now, my current is really old and shady
you're gonna end up spending more money if you take this route...
Sam Amporful is offline   Reply With Quote
Old 07-08-2009, 04:33 AM   #9
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

Quote:
Originally Posted by Savington View Post
There is no possible excuse for using stock rods in a motor build. None. I don't care if God himself installed them. You take them out, get Belfabs, and put them in. It's retarded not to.
If you can tell me that i can remove the PRESS FITTED mounting pins with out damaging the pistons then I promise I will go into credit card debit just so I can order the m-tuned rods tonight
railz is offline   Reply With Quote
Old 07-08-2009, 11:15 AM   #10
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,914
Default

Quote:
Originally Posted by railz View Post
If you can tell me that i can remove the PRESS FITTED mounting pins with out damaging the pistons then I promise I will go into credit card debit just so I can order the m-tuned rods tonight
Granted, I've never built a Miata engine, but from the ones I have done, I don't recall the wrist pin ever being an interference fit into the piston. At least give it a shot. Remove the clips and try tapping the wrist pin out of the piston with a dowel.
Joe Perez is offline   Reply With Quote
Old 07-08-2009, 11:49 AM   #11
Senior Member
iTrader: (5)
 
Join Date: Apr 2008
Location: VA
Posts: 828
Total Cats: -2
Default

Quote:
Originally Posted by Joe Perez View Post
Granted, I've never built a Miata engine, but from the ones I have done, I don't recall the wrist pin ever being an interference fit into the piston. At least give it a shot. Remove the clips and try tapping the wrist pin out of the piston with a dowel.
If the pin was press fit the build wasn't done properly. Often times the pin must be polished down to the correct clearances.
thymer is offline   Reply With Quote
Old 07-08-2009, 01:52 PM   #12
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

sorry guys i cant risk "trying" to remove the pins if i dont got the facts that i can for sure.
railz is offline   Reply With Quote
Old 07-08-2009, 02:14 PM   #13
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,664
Total Cats: 1,560
Default

If it was press fitted did they use circlips or not?

Edit: I am familiar with press fitting wrist pins on rods but never on pistons. Anybody?

Edit Edit: You have the motor apart and all of the machining done and don't want to use forged rods because you don't want to wait just a little longer?
http://www.wavsource.com/snds_2009-07-06_951659426633085/tv/star_trek/logic_dazzling.wav

Last edited by sixshooter; 07-08-2009 at 03:21 PM.
sixshooter is online now   Reply With Quote
Old 07-08-2009, 03:11 PM   #14
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,382
Total Cats: 43
Default

Order rods, take them to machine shop, Give them 40$ and pickup in one day...
elesjuan is offline   Reply With Quote
Old 07-08-2009, 07:35 PM   #15
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

Quote:
Originally Posted by sixshooter View Post
If it was press fitted did they use circlips or not?

Edit: I am familiar with press fitting wrist pins on rods but never on pistons. Anybody?

Edit Edit: You have the motor apart and all of the machining done and don't want to use forged rods because you don't want to wait just a little longer?
http://www.wavsource.com/snds_2009-07-06_951659426633085/tv/star_trek/logic_dazzling.wav

im only assuming that the wrist pins are press fitted and then cir-clips go on each end?

If i can remove the wrist pins with out damaging the pistons i,ll order the m-tuned rods today.
railz is offline   Reply With Quote
Old 07-08-2009, 08:29 PM   #16
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Pretty sure the wrist pins aren't press-fitted in OEM pistons, so either you're going to install fucked-up OEM stuff or you're going to buy Belfab rods and do it right.
Savington is offline   Reply With Quote
Old 07-08-2009, 08:43 PM   #17
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

Lemme tear apart this other block i have and check to see if the wrist pins are removable
railz is offline   Reply With Quote
Old 07-08-2009, 09:33 PM   #18
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by railz View Post
Lemme tear apart this other block i have and check to see if the wrist pins are removable
Its not like re-using syringes with lizards at the truck stop.
hustler is offline   Reply With Quote
Old 07-08-2009, 11:11 PM   #19
I'm Miserable!
Thread Starter
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

ok, all done with the tear down. I checked the wrist pins and they come out like nothing after you remove the cir-clips...doh.

im ordering the M-tuned rods and some ARP main bolts right now.
railz is offline   Reply With Quote
Old 07-08-2009, 11:24 PM   #20
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by railz View Post
ok, all done with the tear down. I checked the wrist pins and they come out like nothing after you remove the cir-clips...doh.

im ordering the M-tuned rods and some ARP main bolts right now.
we were just ******* with you dude, run the stock rods.
hustler is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
Need help - Stock Balancer and Fastforward overlay pulleys Frank_and_Beans Supercharger Discussion 13 09-12-2016 09:17 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Bp/b6 Scat H beam rods Dparks7 Miata parts for sale/trade 1 09-28-2015 10:49 AM


Thread Tools

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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:04 PM.