Blown head gasket blues - Competition Diesel.Com

Whitenightmare · 01-28-2023, 04:17 PM

Well, gotta pay to play. Blew the head gasket on my 12 valve. Coolant POORING out on passenger side. Felpro gasket, stud nuts torqued to 125 ft pounds. Should I torque it more? That’s the spec that the kit from opti torque said. Should I o-ring it? A local machine shop says they can cut the rings in the head. Or should they be in the block? I didn’t get the head cut last time it was off for studs. Checked out nice with a good straight edge though. I’ll update my profile with specs , never dynoed but it rips pretty hard.
12 valve, p pump, 191dv, 5x14 , 18 degrees, 3/4K, 60lb springs, S362.
Nv4500 / 4x4/ Fummins (89 f250)
Thanks in advance, this is the only forum I bother dealing with.

Whitenightmare · 01-28-2023, 04:28 PM

Oh, this thing buries a 35 psi boost guage. I’m guessing 50 . It gets rowdy. . Also, I don’t tow or daily this truck . It’s just for fun.

jasonc · 01-28-2023, 05:46 PM

Get the head surfaced, then O-ringed.

Try to get 135 or more on the studs, get them up to around 120lbs, then 5lb increments after that with long breaks.

You will have no more worries of head gasket issues after.

jasonc · 01-28-2023, 06:05 PM

Also you said it's making 50psi, need to run more timing.

Whitenightmare · 01-28-2023, 07:04 PM

What do you think I should push the timing too?

*RascalMafia* · 01-28-2023, 07:24 PM

362/?/?

I'd bottom tap if you haven't already before going crazy on the torque.

Whitenightmare · 01-28-2023, 07:39 PM

Yes, borg Warner s362 from power driven. Is that weird? It spools pretty quick, seems ok? I did bottom tap when I put the studs in.

bateman · 01-29-2023, 08:49 AM

He’s asking for the turbine specs. 362/68/14cm etc.

If the head comes off once then it’s getting o ringed if it’s mine. Cheap and more reliable. Less of a chance of head coming off a second time for the same issue.

Whitenightmare · 01-29-2023, 09:38 AM

Oh my bad, 362/68/14

jasonc · 01-29-2023, 11:30 AM

Quote:

Originally Posted by Whitenightmare

What do you think I should push the timing too?

Bump it up 3 or 4° from where you are now for a start.

Especially being a stick shift, it will pull through the gears and Rev out farther.

Low timing will make abnormal High boost psi.

Whitenightmare · 01-29-2023, 11:39 AM

Will do, thanks man

Whitenightmare · 01-29-2023, 02:27 PM

Heads getting dropped off to machine shop tomorrow. And I’ll call haisley for a gasket kit

*RascalMafia* · 01-29-2023, 04:02 PM

I'm no Weston, but have always preferred a larger hot wheel. I'd go to a 71 or 74 turbine if you wouldn't mind a slower spool.

95cummins5.9 · 01-29-2023, 04:18 PM

Or the .83 housing with the 68 wheel would spool like the 14mm and have way more top end powa

Whitenightmare · 01-29-2023, 06:05 PM

Appreciate the info guys, when funds allow I’ll definitely try out some different turbo geometry but for now I’m gonna bump the timing up and see how it goes.

jasonc · 01-29-2023, 06:12 PM

A 62/68/14 making over 40psi of boost on a mild 12v,
I bet he's running a real 16ish timing.

Put a bigger turbine or housing on this stick shift truck, it will be a turd.

*Snedge* · 01-30-2023, 05:44 AM

Might want to look into a boost gauge that you don't have to guess what psi you're actually hitting.

biggy238 · 01-30-2023, 06:15 AM

Why was this gasket installed in the first place?
I'm skeptical it's tuneup related.

Sent from my motorola one 5G using Tapatalk

Whitenightmare · 01-30-2023, 11:50 AM

Quote:

Originally Posted by biggy238

Why was this gasket installed in the first place?
I'm skeptical it's tuneup related.

Sent from my motorola one 5G using Tapatalk

It was the most readily available at the time, lesson learned

Whitenightmare · 01-30-2023, 11:51 AM

Quote:

Originally Posted by Snedge

Might want to look into a boost gauge that you don't have to guess what psi you're actually hitting.

I did, never expected to make that much boost when I started this project.

01-28-2023, 04:17 PM	#1
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	Blown head gasket blues Well, gotta pay to play. Blew the head gasket on my 12 valve. Coolant POORING out on passenger side. Felpro gasket, stud nuts torqued to 125 ft pounds. Should I torque it more? That’s the spec that the kit from opti torque said. Should I o-ring it? A local machine shop says they can cut the rings in the head. Or should they be in the block? I didn’t get the head cut last time it was off for studs. Checked out nice with a good straight edge though. I’ll update my profile with specs , never dynoed but it rips pretty hard. 12 valve, p pump, 191dv, 5x14 , 18 degrees, 3/4K, 60lb springs, S362. Nv4500 / 4x4/ Fummins (89 f250) Thanks in advance, this is the only forum I bother dealing with.

01-28-2023, 04:28 PM	#2
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	Oh, this thing buries a 35 psi boost guage. I’m guessing 50 . It gets rowdy. . Also, I don’t tow or daily this truck . It’s just for fun. __________________ 89,Fummins, 12v, p-pump, nv4500,4x4 01, ram, 2500, 24v , nv4500, 4x4 , quadzilla.

01-28-2023, 07:04 PM	#5
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	What do you think I should push the timing too? __________________ 89,Fummins, 12v, p-pump, nv4500,4x4 01, ram, 2500, 24v , nv4500, 4x4 , quadzilla.

01-28-2023, 07:24 PM	#6
RascalMafia Name: RascalMafia Title: heyyyyyyy girrrrrrrl Status: Not Here Join Date: Apr 2007 Location: Middle GA Member`s Gallery Posts: 5,415	362/?/? I'd bottom tap if you haven't already before going crazy on the torque. __________________ '18 Chevy 2500 '14 Cruze Diesel - EFILive by Oz Tuner '08 Corvette Z06 - Vengeance Racing H/C/I, 583 rwhp '07 Kawasaki ZX10R - 175 rwhp Last edited by RascalMafia; 01-28-2023 at 07:30 PM.

01-28-2023, 07:39 PM	#7
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	Yes, borg Warner s362 from power driven. Is that weird? It spools pretty quick, seems ok? I did bottom tap when I put the studs in. __________________ 89,Fummins, 12v, p-pump, nv4500,4x4 01, ram, 2500, 24v , nv4500, 4x4 , quadzilla.

01-28-2023, 05:46 PM	#3
jasonc Name: jasonc Title: Too Much Time Status: Not Here Join Date: Nov 2009 Member`s Gallery Posts: 4,274	Get the head surfaced, then O-ringed. Try to get 135 or more on the studs, get them up to around 120lbs, then 5lb increments after that with long breaks. You will have no more worries of head gasket issues after.

01-28-2023, 06:05 PM	#4
jasonc Name: jasonc Title: Too Much Time Status: Not Here Join Date: Nov 2009 Member`s Gallery Posts: 4,274	Also you said it's making 50psi, need to run more timing.

01-29-2023, 08:49 AM	#8
bateman Name: bateman Title: Too Much Time Status: Not Here Join Date: Feb 2019 Location: Alabama Member`s Gallery Posts: 2,072	He’s asking for the turbine specs. 362/68/14cm etc. If the head comes off once then it’s getting o ringed if it’s mine. Cheap and more reliable. Less of a chance of head coming off a second time for the same issue.

01-29-2023, 09:38 AM	#9
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	Oh my bad, 362/68/14 __________________ 89,Fummins, 12v, p-pump, nv4500,4x4 01, ram, 2500, 24v , nv4500, 4x4 , quadzilla.

01-29-2023, 11:39 AM	#11
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	Will do, thanks man __________________ 89,Fummins, 12v, p-pump, nv4500,4x4 01, ram, 2500, 24v , nv4500, 4x4 , quadzilla.

01-29-2023, 04:02 PM	#13
RascalMafia Name: RascalMafia Title: heyyyyyyy girrrrrrrl Status: Not Here Join Date: Apr 2007 Location: Middle GA Member`s Gallery Posts: 5,415	I'm no Weston, but have always preferred a larger hot wheel. I'd go to a 71 or 74 turbine if you wouldn't mind a slower spool. __________________ '18 Chevy 2500 '14 Cruze Diesel - EFILive by Oz Tuner '08 Corvette Z06 - Vengeance Racing H/C/I, 583 rwhp '07 Kawasaki ZX10R - 175 rwhp

01-29-2023, 06:05 PM	#15
Whitenightmare Name: Whitenightmare Title: Green Behind the Ears Status: Not Here Join Date: Jan 2020 Location: Chester county, Pennsylvania Member`s Gallery Posts: 55	Appreciate the info guys, when funds allow I’ll definitely try out some different turbo geometry but for now I’m gonna bump the timing up and see how it goes. __________________ 89,Fummins, 12v, p-pump, nv4500,4x4 01, ram, 2500, 24v , nv4500, 4x4 , quadzilla.

01-29-2023, 06:12 PM	#16
jasonc Name: jasonc Title: Too Much Time Status: Not Here Join Date: Nov 2009 Member`s Gallery Posts: 4,274	A 62/68/14 making over 40psi of boost on a mild 12v, I bet he's running a real 16ish timing. Put a bigger turbine or housing on this stick shift truck, it will be a turd.

01-30-2023, 05:44 AM	#17
Snedge Name: Snedge Title: Comp Diesel Sponsor Status: Not Here Join Date: Sep 2006 Location: Western Pa. Member`s Gallery Posts: 18,447	Might want to look into a boost gauge that you don't have to guess what psi you're actually hitting.