HeliCoil Spark Plug Inserts?
- Thread starter Oldseadog
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Done that once successfully, but it was a Vauxhall Viva rather than a Rover engine. Not too hard to do - if you can tap a thread you can Helicoil. It was still going 5 years later when my friend sold it. I found it easier to work from the combustion chamber side as there was more room.
jamesmartin
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yes it works well
Many thanks you two.
He will be relieved to hear that ... so guess who will probably be doing it!!
That would make a good picture tutorial
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The only snag on the Rover V8 head is getting the drill at the correct angle (you have to drill out to a size for the Helicoil Tap) and then getting the tap started and running true.
Other than that it's a fairly easy job.
Most engine reconditioners will do it if you have problems, but don't go an mess it up to start with. If you think it's going to be a problem, get someone else to do it, saves scrapping the head.
Are you sure it is stripped rather than cross-threaded?
Peter
Other than that it's a fairly easy job.
Most engine reconditioners will do it if you have problems, but don't go an mess it up to start with. If you think it's going to be a problem, get someone else to do it, saves scrapping the head.
Are you sure it is stripped rather than cross-threaded?
Peter
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If you can get time sert, even better
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Yes, if the thread is not too badly butchered, you might not need to fully helicoil it. I expect you've come across the trick of cutting some grooves in the threaded section of a spare spark plug and using it as an improvised tap to help clean up a damaged thread. It's worked quite well for me in the past.
He got to it before I did, so I didn't have anything to do!
The Helicoil tap, according to the instructions, didn't need per-drilling, so he tapped the hole, inserted the coil, lost the tang, stuck the plug in and apparently it now runs perfectly
For how long, I don't know!
Probably until I get a panic phone call
The Helicoil tap, according to the instructions, didn't need per-drilling, so he tapped the hole, inserted the coil, lost the tang, stuck the plug in and apparently it now runs perfectly
For how long, I don't know!
Probably until I get a panic phone call
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- East Midlands
He got to it before I did, so I didn't have anything to do!
The Helicoil tap, according to the instructions, didn't need per-drilling, so he tapped the hole, inserted the coil, lost the tang, stuck the plug in and apparently it now runs perfectly
For how long, I don't know!
Probably until I get a panic phone call
Well, spark plugs are usually a fairly fine thread so it may not need much meat removing. I don't remember pre-drilling, but it is a long time since I've done one.
+1. much easier and safer to use as its not like a hardened spring it is one piece.
If you use a fair bit of grease on the tap it collects most of the swarf.
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