Ageing K series HT Leads

[needlongerlegs]

HI Guys,

Sorry not a GS question...but some one out there might have been there.

My high speed cumfy chair a 92 K75RT, been a bit of a bugger to start lately

New Battery and Plugs etc...

I suspect the HT leads had a quick surf 35 quid each eak!

Don't want to chuck 100 odd quid away

Any one had any expereince of using pattern leads and caps or will they cook, tucked away in that K series head...

Regards

G

 

[skywalker]

wots the mileage ? try doing a compression test 1st. Should be at least 175psi on all cylinders- anything less looking at worn bores -burnt valves etc-not worth fixing due to values of early model k series

 

[Frank Warner]

The problem is the plug caps - using the after market plastic ones and pulling them out of the K head without braking them is a pain. But that is the cheapest option. Oh they won't cook. Take a look at the modern cars - same set up or worse.

Measuer them for resistance - flex the lead and see if the resistance changes a lot. - Replace if they change. Replace if they are different between each other.

A worn out K? Take a look at the odo - if it is less than 300,000 miles then it aint worn out.

 

[needlongerlegs]

Warn out!!

Its not even run in yet; only 63,000 miles,

I'll have a wire wiggle at the weekend,

R's

G

 

[Tarka]

A common failure on the four cylinder K series is the pickups ( Hall sensors )

A friend had a K1100 that would only run on 2 cylinders due to this.

The effect could well be worse on a triple....

 

[Steptoe]

K75 is the best engine BMW made for racking up huge mileages - I work on 2 couriers K75 that have done over 300K miles

Check the supply connections to the coils, they aren't spade connectors like the K100 , but small plugs, and i've seen lots of them corroded and stuck, they fall apart trying to remove them. So it's worth checking anyway, and pack some silicone grease in there when you put the connections back in place -

The airflow meter can cause very bad starting problems - can take ages to start, but once it's started, it's ok for the rest of the day.

 

[needlongerlegs]

Air flow meter bit sounds a bit worring anything I can check while wire wiggling.

G

 

[cookie]

Air flow meter bit sounds a bit worring anything I can check while wire wiggling.

G

dunno about this bike, but on a VW a duff MAF (air flow meter) can often be diagnosed by unplugging it. if car runs better, it's likely shagged.

you need a proper comuter diagnostic tool to verify really.