Greg Fell

iTrader: (9)

Does anyone know where I can get a tap for the headbolt holes in the block? It would need to be a special long tap.

I know about and have an old head bolt ground down, but I'd rather a real tap.

Beast96Z

iTrader: (21)

The head bolt threads are rolled, so a regular tap won't work. You have to have a speacial "rolled" thread tap or you will weaken the thread by removing material. Where you would get one, I have no clue.

Saving41

iTrader: (1)

[QUOTE=Beast96Z]The head bolt threads are rolled, so a regular tap won't work. You have to have a speacial "rolled" thread tap or you will weaken the thread by removing material. Where you would get one, I have no clue.[/QUOTE

Western Tap made me one...was the only place I could find one. Was pretty expensive though.

Lostpatrolman

iTrader: (3)

how much is pretty expensive? What about the other bolt holes in the block? ANything special as far as taps go? I would like to run a thread chaser down the various holes to make sure they are clean, but am unsure if they are special like the head bolt holes are.

Steve - Race Eng

iTrader: (1)

Timesert makes the thread former but he will not sell you one. A couple of guys broke the tool off in their blocks and then proceeded to sue him. I have used one of these tools in at least fifty blocks with no problems. These guys must have used a pipe wrench on the tool.

In any event, all is not lost. ARP now makes a thread cleaning tool for the LS1 that will not weaken the threads. Part number is: 912-0011. I don't know how long this thread cleaning tool is. You might want to ask if it is long enough without an extension.

Steve

HavATampa

iTrader: (49)

I don't see that part number on ARP's website, must be awfully new. I emailed ARP to find out what the scoop is on this tool. I will be doing a head swap in about a month and would like this item also.

Steve - Race Eng

iTrader: (1)

That tool is listed in the new 2005 catalog as a new item. Web site has probably not been updated.

ARP has a toll free number. You can call and ask if they have any in stock.

Steve

transsam

iTrader: (5)

What about taking a stock bolt, cutting it across the threads the from the tip to about 2 inches in. Run that down and wouldn't that clean the threads???

HavATampa

iTrader: (49)

This is the info I got back from ARP:

Cal

iTrader: (1)

Yeah, that's how I did it; worked well. Then I installed ARP head studs to keep it form happening again.

Saving41

iTrader: (1)

Western tap charged me $100 shipped. But at the time it was the only place I could get
what I needed.