Bradan F355 Berlinetta bare metal paint job, Upholstery, mechanical service

What are those "holes" caused by?

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Those are toast. I think Brian (97 Spider) has a set for sale.

 

Why are they toast? Not sure I'm seeing what you are...!

 

Look at the holes in the ports and look at the deck face - looks like someone use the most coarse file in the tool shed to plane the deck face

 

Ahhh, I was looking on an iPhone, just zoomed in; that’s not pretty! Wonder how that happened!

 

What are you seeing in the ports? All I see is carbon. The deck, not so good but possibly planed?

 

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The valve guides?

 

Ops - I thought those were holes - sorry guys, yep - valve guides sticking out - not holes.

But the deck face is still very poor - could it be re machined? Possibly but it looks like a lot of material has already been removed.

 

Yes, valve guides. Bronze valve guides.

 

I'd almost guarantee those heads have already been milled. Look how close the seats are to the cast pocket - that's not normal nor are the terrible surface gouges. That's been destroyed by someone prior and not remotely normal.

This is one of mine after a mild clean.



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You have a lovely Head

 

I could never find the paint mark either and always had to measure the liners with a boring gauge.

 

Those heads may be milled a lot as the surface looks rather close to the exhaust seats.

Another thing to consider is (and I could be wrong here, my research now amounts to about 10 minutes) but it seems the 5.2 combustion chamber is different than the 2.7 combustion chamber.

2.7 -appears- to my eyes to have more material between the intake valves and kind of a notch shape cut out of the chamber outboard of the exhaust valves.

So far consistent with the pictures I have been looking at, let me know if you guys see something different.

 

That's the point I was making, Jim.

 

I know, just saying may not be a direct comparison to your photos being 5.2 vs 2.7 heads (but still looks rather close)

 

I thought that was brought up about 10 years ago Jim.
The difference in head and block but maybe just block?
Getting oldtimers
Cannot remember nothin
I

 

Quite possibly. I recall it being said the ports were physically larger which sometimes resulted in coolant seepage due to thin walls but don't remember anything being said about different combustion chambers myself.

 

I thought they were talkng about the cooling ports not the intake or exhaust