first time in - please be gentle!
I have a 3.0 TD auto surf, a while back overheated the thing prob going too fast on german autobahns(it was a v hot day!), limped it home, topping water en route, striped head found it was cracked. new head, ouch all has been running OK untill I decided to go back to germany, knock started sounded top end 2 others agreed, was getting worse quickly. now I have got it home (thanks RAC), head off, nothing, engine out & stripped, nothing. have found a step in top of no4 the rebuilder thinks due to previous bodge so.. sleave no 4 re bore new pots polish crank new shells bigger ouch! - however none the wiser as to what the knock can be...here are my observations
1. have stripped head nothing, no marks, no signs of heat, all flat, no leakage on gasket, no sign of anything amiss
2. Block, no marks on top of pots just a light sooty deposit on top so injectors ok?, no cracks, gasket seals ok, no oil in water, no water in oil, apart from step in no4 pot, all 4 bores good condition, and no marks on anything
3. yes before it knocked it was a hot day, temp nowhere near the red, good oil pressure, pulling well, knock was aparent durring a 40 mph 4 mile spell following a 70 - 80, 20 mile motorway run
any ideas out there, I have heard of a local mechanic with good reputation (ex Lotus I'm told) who is having a simillar problem after fitting a new head all his compressions are good, but cant find his knock either!!
Just as a ps I bought a 3.0 because 'they dont overheat, go like a train and dont have problems!' I wish I could remember who said that
tony
I have a 3.0 TD auto surf, a while back overheated the thing prob going too fast on german autobahns(it was a v hot day!), limped it home, topping water en route, striped head found it was cracked. new head, ouch all has been running OK untill I decided to go back to germany, knock started sounded top end 2 others agreed, was getting worse quickly. now I have got it home (thanks RAC), head off, nothing, engine out & stripped, nothing. have found a step in top of no4 the rebuilder thinks due to previous bodge so.. sleave no 4 re bore new pots polish crank new shells bigger ouch! - however none the wiser as to what the knock can be...here are my observations
1. have stripped head nothing, no marks, no signs of heat, all flat, no leakage on gasket, no sign of anything amiss
2. Block, no marks on top of pots just a light sooty deposit on top so injectors ok?, no cracks, gasket seals ok, no oil in water, no water in oil, apart from step in no4 pot, all 4 bores good condition, and no marks on anything
3. yes before it knocked it was a hot day, temp nowhere near the red, good oil pressure, pulling well, knock was aparent durring a 40 mph 4 mile spell following a 70 - 80, 20 mile motorway run
any ideas out there, I have heard of a local mechanic with good reputation (ex Lotus I'm told) who is having a simillar problem after fitting a new head all his compressions are good, but cant find his knock either!!
Just as a ps I bought a 3.0 because 'they dont overheat, go like a train and dont have problems!' I wish I could remember who said that
tony
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