Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > Tech Area- Dodge > Dodge Tech > 03-07 3rd Gen.
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Closed Thread
 
Thread Tools
Old 04-22-2020, 08:55 PM   #1
Nbdiesel

Name: Nbdiesel
Title: Rookie
Status: Not Here
Join Date: Apr 2020
Member`s Gallery
Posts: 17
Head gasket thickness

Ok, doing a rebuild on a truck in just bought. Had the head redone and 6 thousandth taken off and had the block decked 4 thousandth. The previous owner had the head decked when he dropped a valve seat but didn't know how much they took off. Should I get a 10 over or a 20 over head gasket? I know the decking of the block matters for compression but the decking of the head matters for injector location to bowl. I just wonder if he had another 6 thousandth taken off I would be closer to 20 over. My setup is compounds 64/65/12 over s475. 100hp sticks, Hamilton tow cam, springs,studs and HP tuner. Would I feel any lag lowering compression a little bit with a 20 over headgasket?
 
Old 04-23-2020, 03:31 AM   #2
mhuggler

Name: mhuggler
Title: One piece at a time
Status: Not Here
Join Date: Sep 2007
Location: Uno, Pa.
Member`s Gallery
Posts: 1,521
I definitely had a noticeable loss of bottom end response/turbo spoolup with the .020" head gasket. I doubt that you would run into issues with the stock gasket.
__________________
2002 2500 4x4 ETH/DEE-F1 Mach 5's/62/65/12/Smarty/ATS Ex.manifold/AFE intake/TST Comp./.020 marine gasket/o-ringed/ARP studs/5"stacks/Airdog 150/Isspro guages/Southbend 3600 DD/3.54 gears/leveling kit/Bilstein 5100frt,5150rr/37" BFG A/T's on 18" Eagle 114's/Borgeson SS/DSS
 
Old 04-23-2020, 06:35 AM   #3
YoungDiesel27
 
YoungDiesel27's Avatar

Name: YoungDiesel27
Title: Never Enough Time
Status: Not Here
Join Date: Jul 2010
Location: West Virginia
Member`s Gallery
Posts: 825
Check piston protrusion, to make sure there’s enough clearance to the head. After that make sure to check PTV clearance.
__________________
EFI Live, HP Tuners, Smarty custom tuning
 
Old 04-23-2020, 08:20 AM   #4
CorneliusRox
 
CorneliusRox's Avatar

Name: CorneliusRox
Title: Seasoned Rookie
Status: Not Here
Join Date: Dec 2012
Location: Detroit, MI
Member`s Gallery
Posts: 4,154
Quote:
Originally Posted by YoungDiesel27 View Post
Check piston protrusion, to make sure there’s enough clearance to the head. After that make sure to check PTV clearance.
x2, This is the only way that makes sense. Unless you just want to swing a big hammer and lower compression more than you need to.
__________________
Corey - BSME
'21 Tesla Model 3 Perf
'22 DMax AT4 2500
 
Old 04-24-2020, 10:04 AM   #5
Nbdiesel

Name: Nbdiesel
Title: Rookie
Status: Not Here
Join Date: Apr 2020
Member`s Gallery
Posts: 17
Thanks, will do the check first. Will let you know the numbers.
 
Old 04-24-2020, 06:21 PM   #6
spooled05
 
spooled05's Avatar

Name: spooled05
Title: Too Much Time
Status: Not Here
Join Date: Jul 2008
Location: Weatherford ,Tx
Member`s Gallery
Posts: 832
Like said , piston protrusion will dictate what thickness you go with . If you know how much total was taken off the head you can get different thickness injector washers to put them back close to the stock location.
__________________
05 q/c 4x4 dually,twins,dual fuelers HP tuners,Flux inj., Mitusa gusher,full billet DTT!
 
Old 04-25-2020, 08:50 PM   #7
Nbdiesel

Name: Nbdiesel
Title: Rookie
Status: Not Here
Join Date: Apr 2020
Member`s Gallery
Posts: 17
So measured it out and I'm at .034. So the 1.28mm gasket is recommended according the service manual. So now the question is should I get thicker washer for the injector? I took off .006 thousandth and I don't know what the other head work took off. I tried to search for bigger ones, but couldn't find any. Does anyone know where they make some, and what should you think I get? Or just use stock and it won't affect it much? I worry about the tubes not lining up.
 
Old 04-25-2020, 08:55 PM   #8
Nbdiesel

Name: Nbdiesel
Title: Rookie
Status: Not Here
Join Date: Apr 2020
Member`s Gallery
Posts: 17
Here are two pictures
Attached Images
File Type: jpg 20200425_152144.jpg (373.3 KB, 0 views)
File Type: jpg 20200425_152152.jpg (447.9 KB, 0 views)
 
Old 04-25-2020, 10:53 PM   #9
YoungDiesel27
 
YoungDiesel27's Avatar

Name: YoungDiesel27
Title: Never Enough Time
Status: Not Here
Join Date: Jul 2010
Location: West Virginia
Member`s Gallery
Posts: 825
That would be too tight of piston to head clearance. Run stock thickness injector washers.
__________________
EFI Live, HP Tuners, Smarty custom tuning
 
Old 04-26-2020, 11:32 AM   #10
Nbdiesel

Name: Nbdiesel
Title: Rookie
Status: Not Here
Join Date: Apr 2020
Member`s Gallery
Posts: 17
Sorry was going from in to mm. It spec out at .34mm so the service manual says use the thicker gasket if your above .30mm. Out of tolerance is .516mm. So makes sense if they took .004 thousandth off the bock that I would be .34mm of piston protrusion.
 
Old 04-26-2020, 03:25 PM   #11
T-MAN
 
T-MAN's Avatar

Name: T-MAN
Title: misunderstood
Status: Not Here
Join Date: Sep 2008
Member`s Gallery
Posts: 352
I'm not critiquing but check piston protrusion from the center line of the wristpin. The piston will rock in the bore.
__________________
2001.5 ppump allison 11.399@ 117.90 6850#
1997 rcsb 12v 6.7 9.38 @ 146.54
 
Closed Thread

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

Forum Jump


All times are GMT -5. The time now is 11:08 AM.

 


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2024, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com