The Ford Barn

pooch · 01-28-2016, 01:38 AM

Gave the block a good flushing out and noticed water coming out of number one cylinder lower exhaust bolt hole .

Is this a serious concern or does this threaded hole go all the way into the water cavity, or is it rusted away inside or other , or just seal the manifold bolt and forget it ?

scooder · 01-28-2016, 02:48 AM

I'd use a stud in your case, seal it in and forgot about it.
The hole is ment to be blind, but sometimes the hole is a little deep from drilling and re taping or such. Seen it a few times, not that uncommon.
Martin.

moefuzz · 01-28-2016, 03:08 AM

.

I thought all holes were blind in a Flathead?

SBC and BBC use thru holes bore directly into the water jackets which is just an
Absolutely Fantastic Automotive Engineering Idea!

.

scooder · 01-28-2016, 08:29 AM

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Not all holes are blind in stock flathead, how many head studs/bolts go into water? Two bolts are actually submerged in water all the time. But the exhaust manifold threads should be blind, but are sometimes drilled to deep at some point in the past.
Martin.

01-28-2016, 01:38 AM	#1
pooch Senior Member Join Date: Sep 2010 Location: South Coast NSW Australia Posts: 2,596	pilot block water leak exhaust stud Gave the block a good flushing out and noticed water coming out of number one cylinder lower exhaust bolt hole . Is this a serious concern or does this threaded hole go all the way into the water cavity, or is it rusted away inside or other , or just seal the manifold bolt and forget it ?

01-28-2016, 02:48 AM	#2
scooder Senior Member Join Date: Jul 2010 Posts: 2,595	Re: pilot block water leak exhaust stud I'd use a stud in your case, seal it in and forgot about it. The hole is ment to be blind, but sometimes the hole is a little deep from drilling and re taping or such. Seen it a few times, not that uncommon. Martin.

01-28-2016, 03:08 AM	#3
moefuzz Senior Member Join Date: May 2010 Location: Under A Clean V8 Posts: 228	Re: pilot block water leak exhaust stud . I thought all holes were blind in a Flathead? SBC and BBC use thru holes bore directly into the water jackets which is just an Absolutely Fantastic Automotive Engineering Idea! .

01-28-2016, 08:29 AM	#4
scooder Senior Member Join Date: Jul 2010 Posts: 2,595	Re: pilot block water leak exhaust stud Sponsored Links (Register now to hide all advertisements) Not all holes are blind in stock flathead, how many head studs/bolts go into water? Two bolts are actually submerged in water all the time. But the exhaust manifold threads should be blind, but are sometimes drilled to deep at some point in the past. Martin.