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Australian Falcons Discuss the australian born and bred models here. Includes the 80's 90's and present day Falcons offered by Ford Oz.

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Old 03-03-2005, 19:47   #1 (permalink)
wal
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Question Spark Plugs Removal On BA 4.0L engine

Has anyone removed the spark plugs from a BA XT with a 4.0L engine?
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Old 03-03-2005, 23:12   #2 (permalink)
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Re: Spark Plugs Removal On BA 4.0L engine

They are supposed to last 100,000kms before they need to be replaced. I haven't done them personally but I have installed the coil packs etc. on the production line and know what needs to be done to replace them. It would probably be easier to get them done buy a dealer as they probably need a special tool to get to them as they are fitted way down in the cylinder head.
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Old 03-04-2005, 04:01   #3 (permalink)
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Re: Spark Plugs Removal On BA 4.0L engine

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Originally Posted by wal
Has anyone removed the spark plugs from a BA XT with a 4.0L engine?
I regapped my plugs and I did have a few problems with the rubber tube which sits over the plug. After you pull the coil packs off I had to get a long nose pliers and twist the rubber tubes out gently. It is very soft rubber and it breaks easy. Then just use a spark plug socket and extension.
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Old 03-04-2005, 19:47   #4 (permalink)
wal
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Re: Spark Plugs Removal On BA 4.0L engine

Thanks for for your advice. The recommended replacement is at 150,000 Km for the 6 and 105,000Km for the XR6 Turbo. I'am not real keen on the idea of leaving spark plugs in the head for that amount of time, even if the plugs are long life, It could be possible that the plugs become corroded around the thread thus making extraction an expensive procedure. If the plugs are ok, a little graphite grease on the thread before re-insertion may be the difference between the cost of a spark plug or a dammaged head. What do you think? Regards
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Old 03-04-2005, 23:14   #5 (permalink)
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Re: Spark Plugs Removal On BA 4.0L engine

Good idea! Here's another thought. Based on experiences I've had with Jap car engines that have the plugs buried in the head, I smear a little rubber grease on the open end of the boot that slides over the plug stem. On a Suzuki I did the plugs in recently, the rubber boot had succeeded in vulcanising (welding) itself to the plug stem, due to the hot temperatures in the area. There was no way to get it off the plug and out other than to destroy the complicated rubber and plastic boot. I had to replace the entire plug cable set. Hoping for an easier time next time!
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Old 03-08-2005, 15:27   #6 (permalink)
wal
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Re: Spark Plugs Removal On BA 4.0L engine

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Originally Posted by fordboy98
Good idea! Here's another thought. Based on experiences I've had with Jap car engines that have the plugs buried in the head, I smear a little rubber grease on the open end of the boot that slides over the plug stem. On a Suzuki I did the plugs in recently, the rubber boot had succeeded in vulcanising (welding) itself to the plug stem, due to the hot temperatures in the area. There was no way to get it off the plug and out other than to destroy the complicated rubber and plastic boot. I had to replace the entire plug cable set. Hoping for an easier time next time!
Well a friend of mine had a problem with Peugeot 304, he got hold of a 2nd hand alloy head, got all the plugs out except 1 which he had to drill out to extract it. It had been fitted with a heli coil, however the plug was "welded" into the head, now these new BA engines with these long life plugs do not appear to be designed with the home mechanic in mind. Most 2nd hand ford buyers of these BA fords will probably pick a car with 40 to 80K with the oringinal plugs so when the warranty is over may find when it comes to a service that some of the plugs difficult to remove, very expensive head damage can result. So why not a little preventative maintainence?

Long Life iridium plugs do not mean maintainence free!
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