blown intake mainfolds - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 09-25-2012, 08:07 AM Thread Starter
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Exclamation blown intake mainfolds

I have a 95 powerstroke that i recently rebuilt the engine in. I put stage one injectors, upgraded turbo and studed the heads while i was at it. It already had a 140plus tuner, stage 3 water/meth injection, k&n air intake assembly and 5 inch exhaust as well as a banks intercooler. i have no idea the horsepower its putting out but i have seen over 40 psi on the boost gauge. I have the stock silicone-on style intake manifolds. Ive put 12,000 miles on it and they are blown again( they were blown when i rebuilt the engine). Ive been searching online for some heavy-duty aftermarket manifolds with zero success. I was wondering if anyone could offer me some advice on solving my problem. Thanks, Thomas
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post #2 of 5 Old 09-25-2012, 08:12 AM
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What are you reffering to as blown intakes maifolds?? do you have pictures?

Bryan At Alligator
http://www.alligatorperformance.com/

1995 F-250 5spd, 250/100s, T-500 HPOP Colt Stg. 2 cam, Irate Comp E-Fuel, WOP Head Studs, 3in Billet RiffRaff Plenums, Irate T4 Pedestal, S366, 99+ Intercooler, SBC Clutch, 4in Diamond Eye Duals
582/1076
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post #3 of 5 Old 09-25-2012, 08:29 AM Thread Starter
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gaskets

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Originally Posted by Ford7three View Post
What are you reffering to as blown intakes maifolds?? do you have pictures?
The silicone gasket is what is blowing. I even bought the special silicone in a caulking tube from ford and the problem persists. any thoughts? thanks, thomas
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post #4 of 5 Old 09-25-2012, 10:53 AM
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I'll assume you thoroughly cleaned the surfaces of both the heads and manifolds before applying the sealant. Here's what I have on the sealants:

Sealant (Wacker)
Intake Plenums: Motorcraft TA-30 (used to be Ford part F7AZ-19554-EA)
Everything else (oil pan, etc): Motorcraft TA-31 (used to be Ford part F5TZ-19G204-AB)

I'm guessing that maybe you have the 8-bolt manifolds vice the later 10-bolts? Maybe you need to add a "bridge" on top of the manifold to help stiffen them up (at least across where the 2 additional bolts are on the later versions ... is that where they are blowing?). There are billet manifolds out there, but I'll guess that they would be the later 10-bolt models and would need to have the extra 2 sealed up.

Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #5 of 5 Old 09-25-2012, 12:01 PM
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Thats odd. There are trucks making way more power than you without issues. Maybe your plenums are warped?

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me

97 F-250 ECSB project truck:250/2's, Gen 3, S468, SD axles, studs/springs, ZF-6
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