2003-2009 Nissan 350Z

Engine block differences?

Old 04-04-2019, 10:26 PM
Registered User
Thread Starter
Join Date: Oct 2018
Location: San Juan tx
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default Engine block differences?

I recently had to replace my block due to a warped engine block. I own a 2003 350z touring the mechanic i took it to managed to get a 2006 350z block to replace the old one with. Car ran great for a couple weeks then again blew the head gaskets. Could it be due to the fact that the block i replaced it with was from a different year? Is there any differences between the 03 block and 06 one?
Perezbrandon54 is offline  
Old 04-04-2019, 11:05 PM
Super Moderator
iTrader: (8)
terrasmak's Avatar
Join Date: Jan 2007
Location: Sin City
Posts: 25,582
Received 1,137 Likes on 827 Posts

The blocks are the same , unless the 06 block was from a Rev up. Minor differences from what I understand, but will not cause a head gasket failure
terrasmak is offline  
Old 04-05-2019, 11:44 AM
Registered User
Join Date: Jul 2018
Location: Pennsylvania
Posts: 75
Received 13 Likes on 12 Posts

Did you check the heads before installing on the new block? I mean, so that they were completely flat?

ajpasa is offline  
Old 04-08-2019, 11:41 AM
Registered User
iTrader: (4)
Join Date: May 2010
Location: Mountain View, CA
Posts: 570
Received 77 Likes on 63 Posts

An 06 with an automatic trans will have the same block/head design as an 03. If your mechanic sourced the engine from an 06 with the 6MT (A.K.A. Rev-up longblock), you will have problems mating it up in your 03. The engines from 05.5 and 06 years with Automatic Transmissions didn't have any major issues. This was only for the Rev-up longblocks which were only offered in 6MTs.

If the engine you recently replaced suddenly blew a headgasket, it could also have occurred from an improperly bled coolant system...which lead to an overheat scenario, even if your coolant temp. sensor was sending nominal readings. These cars are notorious for being difficult to remove all the air bubbles from the coolant system. There are guides/explanations available on these forums. Make sure your mechanic is aware of the nuances on the 350Z, especially when it comes to bleeding the coolant system.
Good Luck!
icer5160 is offline  
Old 04-09-2019, 07:30 PM
Registered User
Join Date: Apr 2017
Location: Los Angeles
Posts: 63
Received 8 Likes on 8 Posts

Make sure your mechanic is aware of the nuances on the 350Z
Seems like it is a little late for that. Hopefully repairs were made with a warranty.
jimbucks is offline  
Related Topics
Thread Starter
Last Post
Engine & Drivetrain
12-20-2010 06:17 PM
Engine & Drivetrain
01-17-2007 07:56 PM
Forced Induction
09-19-2006 12:50 AM
Engine & Drivetrain
02-14-2006 02:24 PM
2003-2009 Nissan 350Z
10-31-2005 10:27 AM

Thread Tools
Search this Thread
Quick Reply: Engine block differences?

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: