This is a low buck repair trick you can use for when you break the dipstick off in the block, for any engine, but I just happen to have used this on a friends 401.

You will need some 3/8 hard brake line. And make sure you get it a little longer than what you will need. Then you will need a brass couple (Female/Female), that the brake line ends will screw into. Finally, you need a flaring kit and tubing cutter.

What you want to do is to use the brake line for the portion that goes into the block and down into the oil pan. When you fit test this end you will keep one brake line end and fitting on it, the fitting will sit on the block, keeping it from falling into the oil pan. Bend it to fit and cut to length.

Now with the stock upper dipstick, the part you broke off. You will probably have to slide something hard and round up into the broken end portion and hammer the dipstick lightly with a hammer to get it round again. An old punch works great for this. Once you have it round you can slide the other brake line fitting (from that new line sitting on your floor) onto it. You want to cut the length so that when you flare the end and screw it into the couple that is on top of the lower portion that is in your block, keep it as close to stock as you can get it. This will ensure a proper oil reading when checking it.

Here are some pictures. Just click to enlarge.

Here is a close up of the brake line coupler, NEW lower dipstick, and upper stock dipstick	Here are all three pieces laid out with the dipstick	All three put together for the complete dipstick

And here it is finished and installed onto the engine.

The couplers will keep it from going into the oil pan, while the dipstick holder (that bolts up to the valve cover) holds the dipstick aligned, we zip tied it under that holder to keep the dipstick from being pulled out. While you could JB Weld it around the block, tack weld it, or any other way you can think of to keep it from being pulled out.

You might also have to drill out the coupler slightly to get the dipstick to fit through it. We did not have to for this application.