Cornishbloke Posted April 15, 2020 Share Posted April 15, 2020 Hi Is there a separate earth lead from the J60 to the hull and if so where does it connect? Many thanks Richard Quote Link to comment Share on other sites More sharing options...
sirhc Posted April 15, 2020 Share Posted April 15, 2020 Yes, clipped up above the flywheel and bolted to the hull near the alternator. Quote Link to comment Share on other sites More sharing options...
Cornishbloke Posted April 15, 2020 Author Share Posted April 15, 2020 Hi Chris Many thanks - I don't have anything like that. I do have an earth strap that goes from the block back to the starter motor - is this correct? I can't find an attaching point on the hull near the alternator other than the bulkhead fixing bolts. There is a small threaded hole on the bulkhead on the engine side behind the alternator belt tensioner, would this serve the purpose? Cheers Richard Quote Link to comment Share on other sites More sharing options...
sirhc Posted April 15, 2020 Share Posted April 15, 2020 I can’t find a good photo, but you can see the cable on the take out engine on the left of this photo. Quote Link to comment Share on other sites More sharing options...
Cornishbloke Posted April 15, 2020 Author Share Posted April 15, 2020 Hi Chris That's substantial! I've nothing like that at all, nor have I had since owning the vehicle. I've used an earth strap and passed it from the front of the engine to a bolt I've drilled and tapped into the sponson between the air filter and the alternator. I'm hoping that this will be enough to cure a slight problem I've had with it earthing through the throttle return spring. Many thanks for your help Richard Quote Link to comment Share on other sites More sharing options...
Mk3iain Posted April 15, 2020 Share Posted April 15, 2020 I'm not sure if it's relevant to the J60, but the engines used in the series XJ6's were subject to corrosion in the head/block studs if the earth was not connected to the correct position. Certain studs would corrode away in the block and fail, I've had this on an engine from a series 2 4.2. I am no expert but am sure some on here will know more or better. I effect, if the earth is not substantial enough and in the correct position there can be long term problems. Iain Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted April 15, 2020 Share Posted April 15, 2020 Iain, I don't think J60 engines were in a vehicle long enough to corrode! We were for ever pulling out engines from CVR(T) and CVR(W) Fox. Seen some monumental damage to them. Quote Link to comment Share on other sites More sharing options...
sirhc Posted April 15, 2020 Share Posted April 15, 2020 When we were shopping for a J60 to put in our Fox we went to a shed with literally hundreds of them, stacked 2 in a stillage, there must have been over 100 stillages. We were there for several hours before we managed to pick out 5 which didn’t have holes in the side. The 3 in the photo were the ones we ended up with, 2 were seized and one went in the Fox. I’ve never blown one up, but the photo below was taken at Folkestone a few years ago, the engine was in a Sabre at the time. Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted April 15, 2020 Share Posted April 15, 2020 Yes, I have removed the rear armour on Fox's several times and reached in to pull a broken con rod out. One came in with a cam in three pieces. Engines for the Fox were in short supply and it was quicker to demand a CVR(T) engine and convert it. Quote Link to comment Share on other sites More sharing options...
Mk3iain Posted April 16, 2020 Share Posted April 16, 2020 7 hours ago, Richard Farrant said: Iain, I don't think J60 engines were in a vehicle long enough to corrode! We were for ever pulling out engines from CVR(T) and CVR(W) Fox. Seen some monumental damage to them. Haha, so not many long term problems... I don't suppose many spent tens of years running in armoured vehicles running up hundreds of thousands of miles. Be nice if they could.. Iain Quote Link to comment Share on other sites More sharing options...
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