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  Mustangsandmore Forum Archive
  '94 to '04 -- The SN95 Mustang
  BIG Problem With 1996 4.6L Intake Manifold

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Author Topic:   BIG Problem With 1996 4.6L Intake Manifold
Boss Hoss
Gearhead

Posts: 239
From: Georgia
Registered: Mar 2001

posted 06-19-2006 11:38 AM     Click Here to See the Profile for Boss Hoss        Reply w/Quote
My car's 4.6L engine had the famous junky intake manifold that leaked coolant.

About 2 years ago I bought an aftermarket intake with the improved design and installed it myself. The intake fit perfectly and worked perfectly...with NO leaks anywhere. I was VERY satisfied.

But 2 weeks ago, my Mustang developed severe hesitation under hard acceleration. The car basically acted like it was running out of gas and kept misfiring.

My "Check Engine" light finally came on and my code reader indicated a misfire in the #8 cylinder.

This morning, when I pulled the #8 spark plug boot off, I saw that the plug was SOAKING WET with coolant! The hole for the spark plug was so full that coolant ran out of it when I inserted the spark plug wrench!

So, I am assuming that there has been a massive failure somewhere.

BUT WHAT DO YOU THINK HAPPENED?

I checked the torque on all of the intake bolts...they were perfectly within specifications (20 foot-pounds).

I did NOT use Permatex on the intake manifold, per the instructions...should I re-think that? Or should I assume that the intake is cracked or warped? Either way, it looks like I will have to pull the intake and see.

I am SO sick and tired of this 4.6L engine leaking coolant every time I turn around!!!

sigtauenus
Gearhead

Posts: 3969
From: Va Beach
Registered: Jun 2000

posted 07-26-2006 07:47 AM     Click Here to See the Profile for sigtauenus        Reply w/Quote
Did you ever get this resolved?

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