Tap and die crankshaft threads? Rookie mistake w/ crank pulley removal
#1
11 Second Club
Thread Starter
iTrader: (11)
Join Date: Jul 2004
Location: Orlando, FL
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Tap and die crankshaft threads? Rookie mistake w/ crank pulley removal
It is way late. I shouldn't have been working on the car. I was removing the crank pulley. I removed the crank bolt and never put it back in. I used a 1/2 inch extension and pulley puller to remove my crank pulley. Ended up eating 2 or 3 threads and now the crank bolt threads will not start. If I could just start the bolt I'd be happy. Any suggestions or am I fucked and have to replace the crank??? Please help. All my car buddies have gfs now :/
#7
Launching!
iTrader: (1)
If only the first 2-3 threads are gone just run a tap to chase the threads and get your starter thread created on the 3rd to 4th thread down. Like the others said the crank bolt is long and the threads go into the crank deep.
Would not mess with a heli coil on a crank at all!
You can buy a tap without buying the matching die.
Would not mess with a heli coil on a crank at all!
You can buy a tap without buying the matching die.
Trending Topics
#8
11 Second Club
Thread Starter
iTrader: (11)
Join Date: Jul 2004
Location: Orlando, FL
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
You are right. Only about an inch of thread. About 11-13 threads by looking at the bolt. I've completely lost 2.5 threads already. My hope is to tap only about 3 threads in. Obviously it won't like up right unless I get super lucky.
During my lunch I laid the bolt back in (not threaded of course), started the jaw puller. Since the balancer bolt will not thread, it just starts to chew more threads. I stopped instantly as not to do more damage. Looks like I will need a REALLY ******* deep tap and die.
During my lunch I laid the bolt back in (not threaded of course), started the jaw puller. Since the balancer bolt will not thread, it just starts to chew more threads. I stopped instantly as not to do more damage. Looks like I will need a REALLY ******* deep tap and die.
#9
11 Second Club
Call a professional machine shop and explain the situation. Rather than try anything else, running a tap, or otherwise risking more damage, get an expert diagnosis and see what can be done to repair the situation now.
#11
11 Second Club
#12
11 Second Club
Thread Starter
iTrader: (11)
Join Date: Jul 2004
Location: Orlando, FL
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Meaning they are a machine shop not a repair shop. I know the guy personally and he told me to go ahead and tap it. I know there are morons out there that think they can do their own work and can't. I'm decent with tools and not the guy that does things twice lol. I need to find the right size **** now.
This thread shows the bolt is m16x2x103mm
This thread shows the bolt is m16x2x103mm
#13
Launching!
iTrader: (1)
You are right. Only about an inch of thread. About 11-13 threads by looking at the bolt. I've completely lost 2.5 threads already. My hope is to tap only about 3 threads in. Obviously it won't like up right unless I get super lucky.
During my lunch I laid the bolt back in (not threaded of course), started the jaw puller. Since the balancer bolt will not thread, it just starts to chew more threads. I stopped instantly as not to do more damage. Looks like I will need a REALLY ******* deep tap and die.
During my lunch I laid the bolt back in (not threaded of course), started the jaw puller. Since the balancer bolt will not thread, it just starts to chew more threads. I stopped instantly as not to do more damage. Looks like I will need a REALLY ******* deep tap and die.
You can do all this yourself. You fkd it up...now fix it! You can do it! Just keep that tap square with the hole in the crank and it will guide itself. You are only chewing through 1 boogered up lead thread. After that, the rest of the threads will guide the tap for the chase. Go slow and it would help to use some cutting oil, wd40, lps or whatever.
The following users liked this post:
MJ143 (12-08-2022)
#17
11 Second Club
Thread Starter
iTrader: (11)
Join Date: Jul 2004
Location: Orlando, FL
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Well, the crank pulley is still on. The bolt length is 102mm with just the last inch grabbing threads plus the distance from bolt head to front of the pulley. Most 14mm x 2 taps I see don't look long enough. I just have a lot of anxiety right now that's all.
#20
Launching!
Join Date: Dec 2005
Location: fortwayne indiana
Posts: 295
Likes: 0
Received 0 Likes
on
0 Posts
It is way late. I shouldn't have been working on the car. I was removing the crank pulley. I removed the crank bolt and never put it back in. I used a 1/2 inch extension and pulley puller to remove my crank pulley. Ended up eating 2 or 3 threads and now the crank bolt threads will not start. If I could just start the bolt I'd be happy. Any suggestions or am I fucked and have to replace the crank??? Please help. All my car buddies have gfs now :/