4-Bolt or 2-Bolt? - Hyundai Genesis Forum
Engine and Turbos This section is for discussing engine parts (for example, bottom or top end), turbos (upgrades, porting, etc), or other engine related parts or swaps.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 24 Old 02-04-2009, 11:54 PM Thread Starter
Poser!
 
Sabbasaun's Avatar
 
Join Date: Jul 2008
Posts: 2,997
Sabbasaun is on a distinguished road
(Thread Starter)
Thumbs up 4-Bolt or 2-Bolt?

Quote:
Originally Posted by Kevin DSM guy View Post
Well then at least drop the oil pan to see if it has the 4 bolt mains. That's one thing I'm very curious about, but haven't been able to find any answers on.

Kevin I just looked at the service manual, it looks like the Theta engine only has 2 bolt mains. I'm not sure what kind of difference 2bolt vs 4 bolt makes. Perhaps one of the experts can elaborate.

edit: a snippet from the service manual
---------------------
Sabbasaun is offline  
post #2 of 24 Old 02-05-2009, 04:53 AM
Hyundai Employee
 
OHGENESIS's Avatar
 
Join Date: Jan 2009
Location: LORAIN,OHIO
Posts: 139
OHGENESIS is on a distinguished road
wasnt there a topic like this in another section of the forum about the rods and block girdle? sombody had said the bottom end is more beefed up than the evox and srt and showed pics.
OHGENESIS is offline  
post #3 of 24 Old 02-05-2009, 05:50 AM
Moderator
 
Tufast's Avatar
 
Join Date: Sep 2008
Location: Columbus, GA
Posts: 10,780
Tufast is on a distinguished road
A 4 bolt main engine has a stronger crankshaft that doesn't flex as much, the block is also stronger & will not flex as much either. This engine will have less vibration than the 2 bolt main & is better for running at higher RPMs. So, the EVO & SRT4 4 bolts are better than the GenCoupe 2 bolt, but in today's engines, the difference between the 2 is not as big a difference as in the "old school" engines. Once again, we'll just have to see what these things are capable of.

Sponsored By: Columbus Body Works / ARK Performance / Modern Automotive Performance / Forged Performance

Last edited by Tufast; 02-05-2009 at 06:35 AM. Reason: SPELLING
Tufast is offline  
 
post #4 of 24 Old 02-05-2009, 06:16 AM
Hyundai Employee
 
DayDreamer's Avatar
 
Join Date: Jan 2009
Location: Louisiana, USA
Posts: 555
DayDreamer is on a distinguished road
So by looking at this diagram of the main caps and bolts for the 3.8, I guess it would be safe to say that the mains on the V6 are 6 bolt? This isn't really my area of expertise, so I may be wrong...



EDIT: Crap, sorry I guess it's on a transparent background, but I think you get the point...

Last edited by DayDreamer; 02-05-2009 at 06:18 AM.
DayDreamer is offline  
post #5 of 24 Old 02-05-2009, 07:09 AM
Hyundai Employee
 
OHGENESIS's Avatar
 
Join Date: Jan 2009
Location: LORAIN,OHIO
Posts: 139
OHGENESIS is on a distinguished road
just looked at the manual its a ladder frame 4 bolt main system..
OHGENESIS is offline  
post #6 of 24 Old 02-05-2009, 09:18 AM
Veteran
 
Kevin DSM guy's Avatar
 
Join Date: Jan 2009
Location: St. Paul, Mn
Posts: 292
Kevin DSM guy is on a distinguished road
Quote:
Originally Posted by Sabbasaun View Post
Kevin I just looked at the service manual, it looks like the Theta engine only has 2 bolt mains. I'm not sure what kind of difference 2bolt vs 4 bolt makes. Perhaps one of the experts can elaborate.

edit: a snippet from the service manual
---------------------
Was there anything showing the deck of the block? I'd also like to know if it's the semi-closed deck like the Evo, or open deck like the non turbo block.
Kevin DSM guy is offline  
post #7 of 24 Old 02-05-2009, 09:40 AM
Hyundai Employee
 
OHGENESIS's Avatar
 
Join Date: Jan 2009
Location: LORAIN,OHIO
Posts: 139
OHGENESIS is on a distinguished road
i couldnt tell from any of the pictures if its semi -closed or open? you would think its semi-closed. we got are brocures yesturday if anyone local wants one and is close to brunswick, ohio i reserved about a dozen for friends.
OHGENESIS is offline  
post #8 of 24 Old 02-05-2009, 10:12 AM
Veteran
 
Kevin DSM guy's Avatar
 
Join Date: Jan 2009
Location: St. Paul, Mn
Posts: 292
Kevin DSM guy is on a distinguished road
So I finally got that HMAservice thing to work, and found this pic. Looks to me like it'll be an open deck block. Not good...

Kevin DSM guy is offline  
post #9 of 24 Old 02-05-2009, 11:20 AM
Veteran
 
Redline G Coupe's Avatar
 
Join Date: Feb 2009
Location: Bedford Hts, Ohio
Posts: 172
Redline G Coupe is on a distinguished road
Maybe it won't be so bad. The Caliber SRT4 is open deck and Realtune made 500+ hp on the stock block.
Redline G Coupe is offline  
post #10 of 24 Old 02-05-2009, 11:30 AM
Moderator
 
Tufast's Avatar
 
Join Date: Sep 2008
Location: Columbus, GA
Posts: 10,780
Tufast is on a distinguished road
sabbasaun HELP!

sabbasaun, I want to move all the info not dealing with Jrod's purchase of his new car to seperate thread in the engine/turbo section & title it 4 bolt vs 2 bolt main or something of the sort starting with the question from Kevin DSM about which this is, but I don't know how. Can you help me?

Sponsored By: Columbus Body Works / ARK Performance / Modern Automotive Performance / Forged Performance
Tufast is offline  
Reply

Tags
2 bolt , 2 bolt main , 2 bolt vs 4 bolt , 2 vs 4 bolt , 2.0t , 2.0t turbo , 4 bolt , block main , engine specs , mains

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome