Checking HT Leads

[CaesarBob]

Is there an easy way to test the HT Leads using a multimeter or something else?

Anyone know what the resistance should be?

[Gwynleym10]

dunno about checking resistance but if you run the engine its dark you can check for "arcing" thats when a HT lead is split and current is jumping to next lead or to the ground

[CaesarBob]

I've checked the outside of all the leads and there is no sign of damage to the leads. It just seemed strange that the no.4 lead was different to the others. Maybe it's because it's the longest lead?

[Demlotcrew]

Dude BMW use quite specialist tools to check the HT and ignition system its very hard for you to do the same without them.

Andrew

[nwmlarge]

if you have any queries surely its simpler just to replace them

if it makes no odds then you have spare set

it will probably benefit anyway.

[Russ]

Just make sure the engine is running when you remove them! lol

Just kidding!

[CaesarBob]

Yeah - thanks for that Russ!

Problem with buying a set that i don't need is it'll will cost me about Ԛ£100 (which i ain't got right now).

Andrew - so your saying it's a BMW only job to test them properly?

Looks like i'm waiting till it actually breaks before replacing them.

[Ant]

Conti test them Bob M8

compare all the leads and see what results you get, obviously they should be within 10% of each other

HTH ish

Demlot is spot on about the tool BTW,

[nwmlarge]

jesus what the hell are you running if the ht leads cost Ԛ£100 i just bought a set for my 316 for under Ԛ£15

[CaesarBob]

I've got a 318iS so the plugs are all inbetween the cam shafts down a big hole. The leads have massive great insulators on the end. Guess that's why they're so expensive!

Ant - as long as they're all about the same it should be ok? The engine runs with no obvious issues so i'm guessing they ain't that bad.

[nwmlarge]

fair enough