The single ARP thread chaser is $26, figured I could run through a few other bolt holes with this coarse thread chaser set that includes the 7/16-14.

My concern is that it doesn't look like it would make it very deep into the threads before bottoming out... thoughts? Anyone use these suckers?

http://www.jegs.com/webapp/wcs/store...tegoryId=20947

 

The threaded portion on the chaser does not need to be as long as a head bolt, since you will be chasing the threads with the heads off, right? The chaser depth needs only to be as long as the inserted threads on a bolt.

 

Correct, just wondering if those were long enough for even that I'm not sure how much thread engages.. I guess I could check

 

As always, you are correct, less than an inch of thread actually engages. I'll pick up that set. Just went out to the garage to look.

 

They look identical to the ones I got from Sears. On the 7/16-14 chaser, the threaded portion is about 3/8" long plus the shank portion is about 3/4" long. It worked just fine. As I remember only 2 of the 17 bolt holes are blind, the rest go through into the water jacket. The chaser was plenty long to do all of them. In fact, on the bolt holes that go into the water jacket, the chaser will drop right through (just the threaded part and the shank, not the hex head), so you have to be careful when you back it out to make sure you get the threads properly engaged. Be sure to use a good penetrating oil, and then clean the threads with Brake Kleen so the thread sealer will stick and not leak when you finally install the new bolts.