Question about Spark Plugs BR4HS Plug 10/BX #3322

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What is the difference between BR8HS and BR4HS spark plugs. Cheers Paul

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The numbers 4 and 8 are heat ratings. The lower numbers run hotter. Different heat ratings allow you to choose the best compromise between keeping the plug from fouling and making the electrode last longer. If your plugs tend to foul, you need a hotter plug. If they tend to fry away, you need a cooler one. As engines get old, they tend to need hotter plugs. The differences in the heat ratings can be seen in subtle differences in the dimensions of the electrode (usually the center one) and the little insulator around the center electrode. The dimensional changes effect the heat transfer characteristics of the plugs, which changes how effectively the high temperatures present at the spark are conducted away. Besides the heat rating of the plug, the other big factor is having a nice clean thread surface in the engine block, which is why some mechanics will use a thread chaser when changing plugs. Here's a link to NGK's numbering meanings
http://www.ngk.com/sparkplug411_manufacturer.asp?manufacturerID=1
I hope you found this helpful.

Posted on Aug 27, 2010

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2 Answers

What ngk plug will replace the champion plug i listed above


An auto parts store will tell you! advanced auto, autozone etc,

Apr 21, 2016 | Spark Plugs BR4HS Plug 10/BX #3322

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Spark plug replacement


http://www.ngk.com.au/

this the one should be able to order them in from repco supercheap or ebay any NGK plug carrier
http://www.amazon.com/NGK-BR4HS-Standard-Spark-Plug/dp/B000CSIRK0

Aug 21, 2014 | Spark Plugs BR4HS Plug 10/BX #3322

1 Answer

Spark plugs


You need a tool called a spark plug box, comes in two sizes so bring your old spark plug. You might also need a ratchet
that has a head that can be placed at different angles.

Aug 21, 2014 | Spark Plugs BR4HS Plug 10/BX #3322

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HI, I HAVE A 350 SMALL BLOCK CHEV CRATE MOTOR


I'd go with .35 for starters. Gaps shouldn't vary by plug maker.

Sep 25, 2013 | Spark Plugs BR4HS Plug 10/BX #3322

1 Answer

What is the correct spark plugs for a 3.5 v6 jacaroo


The gap may differ from manufacturer to manufacturer if you have the owners manual it will tell u. if not call your local parts store. they will help.

Mar 15, 2013 | Spark Plugs BR4HS Plug 10/BX #3322

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How to replace spark plugs on a 2005 buick lacrosse


You will need to rotate the engine forward after disconnecting the engine supports. Highly suggest getting a book to walk through the process. ( I don't have a lacrosse engine here to photograph). The video speaks to the concept, for a different vehicle. It is very close to what I had to do on a Chevrolet venture van.
http://www.youtube.com/watch?v=C-LCcAmhiHE

Nov 16, 2012 | Spark Plugs BR4HS Plug 10/BX #3322

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Hi got a 1997 johnson outboard is a denso w24fsr spark plug ok for this motor cheers shaun


Stick with the NGK or try a Champion. A Johnson outboard is the only brand motor that will perform well with something besides a NGK.

Feb 28, 2010 | Spark Plugs BR4HS Plug 10/BX #3322

1 Answer

Recommended spark plugs


I would go back with factory plugs. that year model is designed to run many miles and i would stay with factory. I have an 04 model of the same engine.

Oct 05, 2008 | Spark Plugs BR4HS Plug 10/BX #3322

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