Gday All,

I have spent the afternoon replacing spark plugs and rocker seals/tube seals.

When I put it all back together I got a loud whining noise from the engine, seemed to be coming from the front and rear heads. Sounded like a sprintex when its wound up.

I checked for air leaks incase it was air rushing thru a small leak, found nothing, put the old plugs back in and the problem has gone away. I know I bought Bosch Platinums but I dont recall the particular part number as they are all now in the big bin out the back.

So is this the normal thing to happen if I was a noob and happened to pick up the wrong plugs from the shelf? I tried googling it and didnt really get anywhere.

Otherwise, got any recommendations for new plugs? :)

Jump on eBay US & do a search for NGK's.

I'm running the NGK BKR6 platinums on my 3 Magna's, but the BKR5 should do you, unless you've got LPG. You can get a set of 4 at the moment for under $20 plus delivery. Last time I bought mine, I grabbed 30 plugs for $135 delivered!

Sounds to me like you installed the wrong type of plugs - there are 2 different seal designs on sparkplugs - one has a crush washer and flat seat whilst the other has no washer and a tapered seat. Install the wrong one and combustion gases will leak out on every compression stroke from all cylinders and make the exact noise you describe. They are not interchangeable.

Thanks guys, Ill make sure I get the right ones this time. I looked in the book at supercheap and got the model etc, must've just picked up the wrong ones from the shelf.

Spark plugs: now with free supercharger!