Ignition module where to buy one??
Discussion
lig said:
Hi Chaps,
have a minor prob with my griff and am going to change the Ignition Module, have read that you can get these from Lucas for £40 can someone give me a contact number and part number?? I have a 96 500 will they be a standard item??
The modules mounted on the distributor can overheat and then play up. If you remove the amp module, clean the contact surfaces on the amp and the distributor and coat both THINLY with heat conductive paste (the silver paste used for PC chips is suitable) you may find this solves the problem. Later Griffs had the amp remotely mounted to (try to) circumvent the overheating problem.
griffter said:
Hi Chaps,
have a minor prob with my griff and am going to change the Ignition Module, have read that you can get these from Lucas for £40 can someone give me a contact number and part number?? I have a 96 500 will they be a standard item??
The modules mounted on the distributor can overheat and then play up. If you remove the amp module, clean the contact surfaces on the amp and the distributor and coat both THINLY with heat conductive paste (the silver paste used for PC chips is suitable) you may find this solves the problem. Later Griffs had the amp remotely mounted to (try to) circumvent the overheating problem.
Wanting to do that for a while, do you think a bit of copper grease would do the job also. You know the grease used to install brakepads. And on the subject of PC's, you know them smal aluminium heatsinks they use for cooling the motherboard chipset. Would it help to glue one on the ignition module to aid cooling. Just a thought, any ideas ?
Fred
spend said:
Fred, Looks like thats exactly how they did the remote amp on my 96 BMW Discovery (it was a factory car in Munich). It sits at the side of the coil (which is just to the right of the rad) on an ally heat sink. I never realised until I tried to 'borrow' it to help raceboy out!
Dave
That's it then, of to the computer store to buy some heatconducting glue and a nice aluminium heatsink. I have a few old heatsinks lying around from decenia of computing, I'll have a look if any of them fit.
Fred
tvr4ever said:
Wanting to do that for a while, do you think a bit of copper grease would do the job also. You know the grease used to install brakepads. And on the subject of PC's, you know them smal aluminium heatsinks they use for cooling the motherboard chipset. Would it help to glue one on the ignition module to aid cooling. Just a thought, any ideas ?
Fred
Copper grease no - it does conduct heat in some applications, but at the level of contact between the amp and the dizzy/heatsink you're trying to smooth the contact surfaces by filling the microscopic (and not so microscopic) surface irregularities with a heat-conductive compound. Copper grease works OK on larger, coarser applications like brakes, but I think if you used it for the amp you'd get more grease in the rough bits of contact surface than actual copper. I suspect the grease would then act as an insulator and cause less heat conduction than no grease at all. Given the cheap availability of silver PC paste (I paid £1.04 delivered!!) I'd go with that.
Remember to keep the layer as thin as possible, while making sure it covers the whole contact surface. Gently rubbing the amp into place to smooth the paste out worked for me. Incidentally paste (preferably silver or silver compound) is recommended over silicon-based products, which are apparently less efficient.
If you glue a heatsink to the amp module - which I guess would help - do it with heat conductive adhesive!
>> Edited by griffter on Friday 10th December 12:41
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