bengaku Posted October 3, 2017 Report Share Posted October 3, 2017 Hi rather stupidly i allowed my son-inlaw to drive my 1976 spitfire he over revved the engine even though i told him to make sure he didnt what a moron .anyway after him driving if that what you call wrecking a car the engine was making a hell of a racket seems to be coming from top at rocker cover took this off but saw nothing out of place so has anyone else had this problem with over revving and then a sort of clanking noise sounds like a tractor on a bad day any suggestions would be greatly appreciated. Thanks for looking regards Paul Link to comment Share on other sites More sharing options...
dougbgt6 Posted October 3, 2017 Report Share Posted October 3, 2017 Little ends? Knackered valve? Try the big screwdriver stethoscope, tip on the cylinder head, handle to ear. Move up and down the head to see if noise is localised. Noise can be deceptive and appear to be coming from elsewhere, big ends? However, I wouldn't run the engine too long to avoid further damage. Are you in touch with any local club members who could give you some advice? But sounds like head off for starters. Link to comment Share on other sites More sharing options...
Ben Caswell Posted October 3, 2017 Report Share Posted October 3, 2017 If the head has had an unleaded conversion its possible that one of the inserts has dropped out but I would think you would find one of the valve clearances being held open more than normal. Link to comment Share on other sites More sharing options...
AidanT Posted October 3, 2017 Report Share Posted October 3, 2017 Ignore this if you were already aware but you can run the engine on tick over without the rocker cover on You may see something amiss more easily than just listening Aidan Link to comment Share on other sites More sharing options...
bengaku Posted October 3, 2017 Author Report Share Posted October 3, 2017 Do you need to watch out for oil spurting about if i run engine on tick over without rocker cover ?and what sort of things would i be looking for with cover off thanks for all your help Link to comment Share on other sites More sharing options...
Colin Lindsay Posted October 3, 2017 Report Share Posted October 3, 2017 You'll have some light splashing but not an excessive amount flying about. You may be able to narrow the noise down to one end of the engine or the other by just listening or watching how the parts move when running; don't get too close if anything is likely to get caught or tangled. Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 3, 2017 Report Share Posted October 3, 2017 Big bends clank if this is 1500 and its stretched its legs it may be terminal bearing failure As said on the Look for a cheap option see if any push rods jumped out , broken valve springs rockers with large clearances using a screwdriver is a good start but keep it out of the fan or its A &E to get it removed Pete Link to comment Share on other sites More sharing options...
AidanT Posted October 3, 2017 Report Share Posted October 3, 2017 We had mine running without the cover at the twiddle day No one got any oil on them and there were plenty of people watching all round the engine One if the things I have learnt from Pete the Oracle! Aidan Link to comment Share on other sites More sharing options...
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