Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Welcome to OOF

Pages: 1 [2]  All   Go Down

Author Topic: Astra H plugs  (Read 411 times)

0 Members and 1 Guest are viewing this topic.

Doctor Gollum

  • Omega Queen
  • ********
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 14205
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Astra H plugs
« Reply #15 on: 16 October 2019, 19:50:11 »

If they're too long you run the risk of being struck by the piston, and too short and they become shielded by the head and the mixture won't burn cleanly.

Like you said, even genuine plugs are less than a tenner, so really not worth the risk :y
Logged
Onanists always think outside the box.

Nick W

  • Omega Lord
  • *******
  • Offline Offline
  • Gender: Male
  • Chatham, Kent
  • Posts: 7509
  • Rover Metro 1.8VVC
    • 3.0l Elite estate
    • View Profile
Re: Astra H plugs
« Reply #16 on: Yesterday at 10:33:11 »

Ditching distributors and points based ignition arrangements for high ouput mapped systems is the root of longer plug life. FI further improved it.


100k intervals don't appeal to me though.
Logged

Enceladus

  • Intermediate Member
  • ***
  • Offline Offline
  • Gender: Male
  • London
  • Posts: 360
    • View Profile
Re: Astra H plugs
« Reply #17 on: Yesterday at 12:31:14 »

I've put Omega plugs in all sorts of cars without issue  :y if they fit they've always worked
Interesting. I was taught that plugs with too hot a heat rating would oil up when idling, while cool plugs would glow red hot at full power and cause pre-ignition. I suspect most modern petrol Vauxhalls have similar requirements, so the plugs are interchangeable. Having said that, plugs are so cheap it's probably not worth the risk.

Omega plugs are the same heat range as those in your Astra.

Bosch & Beru, NGK, Champion etc use different scales for heat.
Most of the Omega plugs were Bosch and 8 on the Bosch heatscale. Approximately equivalent to 5 on the NGK scale. NGK 6 would be approximately equivalent to 7 on the Bosch scale.

I don't believe your NGK plugs are the "100K miles" version. They're standard model Copper/Nickel plugs. The extreme long life plugs will be the multi-pole Beru Platinum/Iridium plugs Z190.

That said if your NGK plugs have truly lasted 103K miles, then I would replace with the same.
Logged

biggriffin

  • Moaning Haddock Head
  • *
  • Offline Offline
  • huntingdon, Hoof'land
  • Posts: 8149
    • Vectra in a posh frock.
    • View Profile
Re: Astra H plugs
« Reply #18 on: Yesterday at 14:12:20 »

Every motor I've ever owned, had new plugs every service,.
Logged
Hoof'land storeman.

STEMO

  • Omega Queen
  • ********
  • Offline Offline
  • Gender: Male
  • Up North
  • Posts: 13264
    • Astra 2.0 diesel
    • View Profile
Re: Astra H plugs
« Reply #19 on: Yesterday at 15:19:14 »

Spark plugs, eh? Complicated stuff.
Logged
If you are offended by anything I post, sorry. Just thought I'd get that in now.

Nick W

  • Omega Lord
  • *******
  • Offline Offline
  • Gender: Male
  • Chatham, Kent
  • Posts: 7509
  • Rover Metro 1.8VVC
    • 3.0l Elite estate
    • View Profile
Re: Astra H plugs
« Reply #20 on: Yesterday at 16:59:34 »

Every motor I've ever owned, had new plugs every service,.


exactly
Logged

terry paget

  • Omega Baron
  • ******
  • Offline Offline
  • Gender: Male
  • Midsomer Norton Somerset
  • Posts: 4191
    • 1 Omega 3 Astras 1 Vectra
    • View Profile
Re: Astra H plugs
« Reply #21 on: Yesterday at 22:51:54 »

I've put Omega plugs in all sorts of cars without issue  :y if they fit they've always worked
Interesting. I was taught that plugs with too hot a heat rating would oil up when idling, while cool plugs would glow red hot at full power and cause pre-ignition. I suspect most modern petrol Vauxhalls have similar requirements, so the plugs are interchangeable. Having said that, plugs are so cheap it's probably not worth the risk.

Omega plugs are the same heat range as those in your Astra.

Bosch & Beru, NGK, Champion etc use different scales for heat.
Most of the Omega plugs were Bosch and 8 on the Bosch heatscale. Approximately equivalent to 5 on the NGK scale. NGK 6 would be approximately equivalent to 7 on the Bosch scale.

I don't believe your NGK plugs are the "100K miles" version. They're standard model Copper/Nickel plugs. The extreme long life plugs will be the multi-pole Beru Platinum/Iridium plugs Z190.

That said if your NGK plugs have truly lasted 103K miles, then I would replace with the same.
Thanks for that. May I take it that the 5 in the NGK label NGK R ZFR5F was the heat rating? I note Haynes prescribes Champion RC 10MCC R6 plugs for the Astra 1.4 and 1.6 normally aspirated, NGK IFR7X-7G for the 1.4 turbo, and NGK ZFR6BP-G for the 1.6 turbo, very specific.
The plugs I removed were well eroded, and I imagine were original. As said before, modern cars are wonderful. The Senator was not so good, electronic ignition, but with a distributor at the front behind the open cheese grater grill, which allowed the rain to blow in.
Logged

Enceladus

  • Intermediate Member
  • ***
  • Offline Offline
  • Gender: Male
  • London
  • Posts: 360
    • View Profile
Re: Astra H plugs
« Reply #22 on: Today at 03:10:18 »

May I take it that the 5 in the NGK label NGK R ZFR5F was the heat rating? I note Haynes prescribes Champion RC 10MCC R6 plugs for the Astra 1.4 and 1.6 normally aspirated, NGK IFR7X-7G for the 1.4 turbo, and NGK ZFR6BP-G for the 1.6 turbo, very specific.
The plugs I removed were well eroded, and I imagine were original. As said before, modern cars are wonderful. The Senator was not so good, electronic ignition, but with a distributor at the front behind the open cheese grater grill, which allowed the rain to blow in.
That's right the '5' on the NGK is the heat rating.
As I see it the Vauxhall EPC lists two possible factory fit plugs for your 1.6. Bosch FQR8LE2 and Champion RC10MCC (aka OE198/T10). These and your NGK ZFR5F are all equivalents and are single pole Copper/Nickel. However they all use different heat scales and counter intuitively a lower number is hotter on the NGK scale. Hence Bosch 8 <=> Champion 10 <=> NGK 5. It's never a precise equivalence.

The turbo plugs are colder and are Iridium and Platinum.

So likely somebody changed the plugs in your Astra for the NGKs some time ago. Seems probable they were not factory fit but aftermarket.

I wish I still had my Senator.
Logged
Pages: 1 [2]  All   Go Up
 

Page created in 0.116 seconds with 23 queries.