one of my new vance& hine shortshots have chrome in the oxygen sensor hole or the threads were messed up at the factory. i would like to try and tap it out before i have to repack and send them back for replacement. anyone know what size tap to get?

 

I don't have a clue about what size you need but you can buy a complete Metric/SAE kit for $15.00 at Harbor Freight.

Granted not the Highest Pro Machinist quality that will last years under everyday use but they will clean up threads for that now and maybe next year need.

http://www.harborfreight.com/40-piec...set-39391.html

Karsten

 

You can spray some carb cleaner in the hole, let it sit and you should be able to chase the chrome out one groove at a time. Is it a big gob, or just at the very start of the thread. Post a pic and everyone will give to a good idea.

 

looks like it just needs to have a tap run through to clean threads up. read some reviews on dennis kirk site and seems this has happend a few other times, most said it takes a 18 mm 1.5 tap for the job. is this a standard thread and is it course or fine?

 

It is the same as the large sparkplugs they used to use years ago. If you get a thread chaser from autozone it has 14mm and 18mm and use the 18mm side and that should do it for you. think it is 18x1.5 and thats in between fine and course ..... 1.25 is fine and goes to 1.0

 

thanks much

 

Blk and Chrome is exactly right. Its one of those $10 tools that's PRICELESS when you need it.

 

thanks for the heads up on the thread chaser from autozone, ran it through the new vance& hine shortshot oxygen senser port and senser threaded right in just like it was supposed to. gona try to finish install tomoro if i can get up early enough before work. again thank all very much.