CHRIS_D

Mods: i need a quick answer on this one, appreciated if you leave it here, cheers.

I need to re-tap (or basically clear out) the thread to the hole on my magnex decat downpipe that takes the lamba sensor and i need it done by next friday

In order to do this i need to get a tap that is the right size. i've seen this tap reseater here.

would this be suitable, if not which size do i get ?

Desparate for answer guys, need to order one online now

cheers
chris

BTW if it helps, car is an MY99 Sti5

RB5SCOTT

Same size as a sierra spark plug

CHRIS_D

lol

ok what size is a sierra spark plug thread

RB5SCOTT

Don't know, but its the same size

CHRIS_D

anyone else ????

cheers scott BTW

CHRIS_D

bttt

skiddus_markus

6 posts,currently.

Brun

8

CHRIS_D

yeh yeh

not helping me in my quest though

jonny gav

iTrader: (1)

i am sure its 18mm, Pitch @ 1.25

CHRIS_D

thanks johnny

i was thinking 18 mm as that is what a sierra sparg plug is

anyone know where i can get a tap that size without buying a complete set and paying through the nose

Steve Lawson

I think its actually 1.5mm pitch,will check at work in the morning and repost then.

You can pick them up from any engineering supply place best break out the Yellow Pages in your area.Cost me about twenty quid for my one.

Regards

Steve

callum Sti02

I think the thread may be the same as the wideband sensor which is M18 x 1.5.

If you run a search on www.jlindustrial.com - UK section - then you should find individual taps at £14 /£16 list. Some discount can generally be negotiated. If makes mean nothing to you then I have good success with Galtona.

Chelspeed

Agreed, M18 x 1.5.

To clean the thread cheaply buy a spark plug for a Ford SOHC pinto engine, from anything from 1976 Escort RS2000 to 2.0i Sierra. Use an angle grinder to cut a slot in the thread, at an angle to the thread and tapered away from the thread. Then wind it into the the thread and it will act vaguely like a tap and clean the thread. Should cost about £2.

CHRIS_D

cheers chelspeed

will give that a try

minor_threat

So far it's 16 posts long.

CHRIS_D

your a bit slow minor threat

thats been done twice already

CHRIS_D

many thanks for your replies guys, job done.

With your help I have now sorted the problem

I went to halfords initially to buy a 2.0l sierra spark plug, but they only came in packs of four for £13. so i went and had a look in the tools section and found an 18 / 14 mm thread chaser (luckily as it was the last one), checked it against one of the sparg plug threads and bingo.

£3.99, bargain !

The power of Scoobynet never lets me down

Also i've noticed that ever since i've started modding my scoob my mechanics tool box has more than doubled