8BA block leaking water from exhaust port ?

[Jack E/NJ]

Bluebell>>>Gosfast, wouldn't it be better to make up a stud with a longer thread>>>

Yeah, after a couple hunnert thousand miles, I'd like to see how easy it'd be to replace that plug with a screw driver. 8^) Sorry, Gosfast, I couldn't help myself.

Jack E/NJ

[dono50]

Bluebell, I think your on to something with that much water. I took a compression test on the right bank and cylinders #2 and #3 have lower compression.
My next step is to have the head milled,new head gasket and longer bolt trick.

[dono50]

Bluebell, I think your on to something with that much water.
I took a compression test on the right bank and cylinders #2 and #3 have less compression. My next step is to have the head milled, new head gasket and longer center bolt. Will advise

[russcc]

Diagnosis is not assuming anything. If there were no leaks under pressure, then what could be the source ? The Fordbarnes are experts and can take the logic to the next level, stp by step. Cheers

[kendall]

it may be as simple as the wrong head gasket. pull the head.

[Mike in AZ]

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just curious....why have head milled??....Mike

[dono50]

I'll check the head first for straightness,if bad, replace or mill.
The exhaust valves on 2 and 3 cylinders have a water jacket between them and the exhaust exits thrust the center port.

[dono50]

Found the water leak in the exhaust port today. I removed the top center headbolt on the passenger head, added water so it would leak, and looked up the center exhaust port and the stream of water is exiting from a hole on the opposite side of the exhaust port in line with the head bolt I removed.
Any fix for this problem or is the block trash?

[itslow]

Originally Posted by kendall

it may be as simple as the wrong head gasket. pull the head.

That particular hole won't put water into the combustion chamber if left unsealed. If unsealed, it'll dump water all over the outside of the block.

[Mart]

Are you saying you removed the stud at the top of the exhaust port, and the water is coming in from the bottom side of the port, opposite of where the stud screws in from the top?

Do you think someone drilled out a broken stud and drilled straight through the bottom of the port into the water jacket??

This does sound pretty serious.

How hard would it be to get access to the leaking hole, drill and tap it and fit a npt pipe plug?

Mart.

[Mike51Merc]

Guys:

Isn't that the same hole that is used to bolt in aftermarket exhaust dividers?

I think Mart is right, or perhaps a longer bolt to pass through the port into the lower hole.

[Walt Dupont--Me.]

It is the bolt hole where you bolt down the deidviders. Can you see how big the hole is? Maybe some good block sealer will seal it. They do make some good block sealer, cain't remember the name, someone on here might know, It's worth a try. At least the water is not getting into the engine so you could try some sealers. Walt

[dono50]

Marty,
The extra hole is in line with the center head bolt that is near the temp. sensor.
The head bolt is 7/16, if I remember correctly, however the extra hole is about 1/4 in diameter with threads. I tried a 1/4 bolt with course, no good. It might be a pipe thread.
I don't know what an exhaust divider is but does it require drilling and tapping a hole in the port? The hole is only about a 1/4 inch deep. Too bad, would have been a nice engine!

[rotorwrench]

The dividers are an aftermarket add on that seperates the siamese port a bit more to prevent cross contamination between the two cylinders. It required a threaded fastener like a screw or a stud with a slot cut into it to hold it in place.

[Mart]

Could you drill it to 1/8 npt and tease a little pipe plug into it? The taper threads should tighten up and seal it all up. I have seen the plugs with a 3/16" hex key socket in them. They'd work well, I think.

I must say, though, it's a bit hard to tell exactly what needs doing without the parts right in front of me.

Mart.

[dono50]

Originally Posted by dono50

Installed an 8BA engine with new rings,bearing and valve job.
Added water and a stream of water exiting thru the header on the passenger side.
Loosened the bolts on the header and the water is coming from the center port. Any help appreciated

Here's what I have after cleaning the the extra hole in the exh port.
Someone drilled out a broken head bolt thru the exhaust port into the water jacket, hence the leak.
It is a hole within a hole. The larger hole is 9/64 with a smaller hole that is 9/64 in the center. No threads, I stand corrected.
Might be able to use the 2 piece headbolt as Gofast suggested or tap one of the extra holes and make a plug.
Any suggestions ?

[dono50]

Corection...Correction. The large hole is 7/32 and the small hole is 9/64

[Jack E/NJ]

Not being able to see exactly what you're up against, I assume the hole you're trying to plug is fairly small. How about trying to use a self-tapping screw slathered with hi-temp RTV?

Jack E/NJ

[Vergil]

This is a cut a way of the exhaust port, might help in describing which bolt

[GOSFAST]

Originally Posted by Mart

I must say, though, it's a bit hard to tell exactly what needs doing without the parts right in front of me.

Mart.

Couldn't have said it any better, it's much easier to come in with an idea when you're staring down at the parts.

Don, from the sound of the issue the separate stud idea may work?? Would help some if you could maybe draw a diagram, even by hand, or use the "cutaway" photo above and improvise on it?

The shorter stud I recommended above could have an end machined into/onto it to act as a "cork" so to speak. This is if I'm understanding where the hole is located?? Is the hole past the exhaust port, on the far side of it??

(Add) Hope Vergil doesn't mind, I'm using his photo to help show the issue. Is the hole located where the "black" circle is on his shot? Very nice cutaway by the way!

Thanks, Gary in N.Y.

P.S. To me this still has a "ring" of repairability to it. As I say, it is somewhat easier with pictures, even crude ones!