3v block and 2v heads?? NEED HELP!!
Thread Starter
|
Freshman User
Joined: Feb 2011
Posts: 25
Likes: 0
From: Frozen Minnesota
3v block and 2v heads?? NEED HELP!!
Hi folks, I really need some advice. Here's the scenario. I have a 2001 F250 with a spark plug issue, which is the reason I am the new owner. The PO wrecked the passenger head, and bought a 2005 3V motor with the misguided intent on doing the swap. So, I pulled the motor, sourced a used head on ebay (1c2e), and did the following to the now good pair; 3 angle valve job with new seals, milled, exhaust studs, and timeserts, all 10 holes. I decided to put the heads back on the 177,000 mile original short block, and leave the 49,000 mile 3V motor intact for another project, until i saw some scoring on cylinders 6,7 and 8. So, I pulled the heads off the 3V and, before setting my fresh heads on, noticed that the pistons sit a little higher in the bores. A real down and dirty check has the dome height in the newer motor at about .090" higher in the bore. So, the questions I have are will their be any piston to valve issues using 2V heads on a 3V block? Will their be any detonation issues with the resulting compression increase? Anything else to consider in doing this swap? I plan on put this thing together tomorrow, so time is of the essence. Thanks in advance.
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
Hi folks, I really need some advice. Here's the scenario. I have a 2001 F250 with a spark plug issue, which is the reason I am the new owner. The PO wrecked the passenger head, and bought a 2005 3V motor with the misguided intent on doing the swap. So, I pulled the motor, sourced a used head on ebay (1c2e), and did the following to the now good pair; 3 angle valve job with new seals, milled, exhaust studs, and timeserts, all 10 holes. I decided to put the heads back on the 177,000 mile original short block, and leave the 49,000 mile 3V motor intact for another project, until i saw some scoring on cylinders 6,7 and 8. So, I pulled the heads off the 3V and, before setting my fresh heads on, noticed that the pistons sit a little higher in the bores. A real down and dirty check has the dome height in the newer motor at about .090" higher in the bore. So, the questions I have are will their be any piston to valve issues using 2V heads on a 3V block? Will their be any detonation issues with the resulting compression increase? Anything else to consider in doing this swap? I plan on put this thing together tomorrow, so time is of the essence. Thanks in advance.
JL
Thread Starter
|
Freshman User
Joined: Feb 2011
Posts: 25
Likes: 0
From: Frozen Minnesota
dish size
Thanks for the response. The dish size (diameter)is nearly identical, but it sits in the bore about .090" higher than the 2V does. This will give me a healthy bump in CR. I'm in the process of finishing up assembly of the engine and will hopefully have it in the truck today. I also took the time to tape the install of timeserts in all 10 holes, and tape the install of the timing chains without any special tools. I will be posting these on u tube as soon as I get the truck running, and edit the files.
Thread
Thread Starter
Forum
Replies
Last Post
Fefanatic
1999 - 2016 Super Duty
7
Sep 13, 2016 05:52 PM
7.3 PStroke
1999 - 2003 7.3L Power Stroke Diesel
46
Aug 9, 2016 07:48 AM
Jeffrey Sutton
2004 - 2008 F150
3
May 10, 2014 05:51 AM
acheda
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
32
Jan 6, 2012 06:01 PM
BURNSTOUGHFORD
Modular V8 (4.6L, 5.4L)
34
Dec 23, 2010 12:45 AM
