Broken Drill Bits in Exhaust Stud Holes

[OTTO 1303]

Is your motor STOCK?

Verify before you order anything.
_________________
74 Super Sun Bug - OTTO
74 Super - DANZIG
74 Super - HERZOG

[quantumchaos]

So if I replaced the heads I would need the 85.5mm unless I modify the pistons, etc, correct.

[OTTO 1303]

Are you certain that the PO's did not modify the engine? Did you build the engine?
It appears (from a photo in different thread) that you have an AK block, which would be period correct for a 73, but that doesn't mean that it is original or unmodified.

Because of the age, possible multiple owners, their ideas, parts availability, etc., we as the current owners CANNOT ASSUME that everything is stock when ordering parts. WE MUST VERIFY or work with first hand knowledge.

Before you order any parts, verify what you have and then order.
In your case, verify that you indeed have 85.5 cylinders BEFORE you assume they are. Measure the ID and OD of cylinder. Look at top of piston to verify size (typically stamped)

For example, from an outside visual, the cylinder may appear correct, however, unless it is stamped on the outside of cylinder, how do you KNOW?
The previous owner may have put in a larger set of cylinders, maybe thick wall, and any other possible variation that is available. If thick wall, the head would have been modified to accept.

From observing your photos, there appears to be many NON-STOCK items installed, DON'T ASSUME ANYTHING, otherwise you will open a BIGGER can of worms, and you will spend more time CHASING the right part instead of installing the right part the first time and enjoying your Beetle.

PS. If you do decide to change those heads, DON'T JUNK the old ones. At the very least, offer them to someone who has a bigger current skillset and may be able to repair, OR, hold on to them until your skillset grows to the point of possible repair.
IF you decide to sell the car before that happens, kindly place the heads in the frunk for the next owner.

Good Luck
_________________
74 Super Sun Bug - OTTO
74 Super - DANZIG
74 Super - HERZOG

[quantumchaos]

Thank You

[quantumchaos]

How about these:

https://www.amazon.com/IAP-Performance-043101355CK-Complete-Cylinder/dp/B0150I5D6W

[johnnyvw164]

As OTTO 1303 said, check to see what is in your engine now, you so you know what you need to buy rather than just buying random parts. And unless you are buying two new heads, you may need some machine work done to match what is currently on the engine (you may need this even if you ARE replacing both heads...) You may need to buy from a specialty shop that can do that type of work, rather than shopping on amazon.

[Pruneman99]

[quantumchaos]

Do you have any examples of heads that don't have the step-up in the chamber, and why wouldn't you buy those.

Thanks
Matt

[Beetsme]

What a frustrating spot to snap a stud! Since either repair or replace requires you to remove the head, maybe start there. Pull it off, take your measurements, post some pictures of what you have. Probably will get some better answers. Even if you don't have machine tools, you can easily measure to a half millimeter with a tape measure to confirm basic sizes.

And contact the guy that says he can EDM to see if its a cost effective alternative to a new head. Go google EDM if you are unfamiliar with it.

[Pruneman99]