Engine oil pressure switch threads pulled!!

[Finto_GX]

As title says, my engine oil pressure switch has pulled threads. I've tried new pressure switch, some sealant , plumbers tape and nothing seems to seal it. It tightens as a normal thread would but still seams to leak by. Anyone ever had this problem before or any suggestions?

 

[andy]

helli coil.

 

[andy]

helicoil ________________ rather

 

[Finto_GX]

I'm going to try a copper washer tonight and see how I get on. Would I have to drill the hole bigger to accommodate the helicoil so original switcu can be fitted?

 

[SuperUno]

I'm going to try a copper washer tonight and see how I get on. Would I have to drill the hole bigger to accommodate the helicoil so original switcu can be fitted?

Yes you would, but i think the washer should help, i had an issue like this with an old rally car (Uno) which was solved with either a copper washer or fibre washer. Can't remember which as it was a long time a go!

 

[Finto_GX]

Pulling my hair out with this problem was ment to go for cars nct (mot). And had to postpone with this issue.. Hope the washer sorts it. Should I put some sealant on threads as well with copper washer or leave on its own.

 

[SuperUno]

A small bit of PFTE tape won't hurt, but only a very small amount i.e. one wrap of it.

 

[frank]

its a tapered thread tho, you have probably stripped the thread by forcing an npt fitting into the bspt thread finto

 

[Finto_GX]

But how come the old one leaker even with sealant on it? The new ones threads are exact same and tighten home

 

[Finto_GX]

Copper washer and plumber tape didn't work. Still flowing out like a tap

 

[Finto_GX]

So I found the problem. A crack in my block about 2 inches long. It cracked across the housing for the threads. No wonder it wouldn't seal. Block is out and away off getting welded , drilled and helicoiled with a new switch . let's hope it works .

 

[andy]

nice one, hope it sorts it out

 

[Finto_GX]

Such a nightmare haha. Hope to have built back up in a few days

 

[eiregti]

Not concerned as to how or why the block cracked??

Sent from my SM-G900F using Tapatalk

 

[Finto_GX]

My guess sensor was overtightened when built. Its welded and new sensor fitted with helicoil