Guest ntc Posted April 28, 2013 Report Share Posted April 28, 2013 Just like Mine sounded then the noise got Horrendous,stripping mine Sunday and will let ye know. And? Quote Link to post Share on other sites
TR NIALL Posted April 28, 2013 Report Share Posted April 28, 2013 (edited) Just like Mine sounded then the noise got Horrendous,stripping mine Sunday and will let ye know. Well Stripped mine Today and the Result is Number 6 Inlet Valve Guide had come loose broke about 20mm of the Botton of Guide,found a few small fragments sitting on top of Piston but most must of got blown out of Exhaust Valve,small Damage to Crown of Piston but Bores all fine,New Guide,New Valve and Head Gasket and good to go again. Took plenty of Pics so will try and get them Posted Only just seen your And? Me Happy . Edited April 28, 2013 by TR NIALL Quote Link to post Share on other sites
Guest ntc Posted April 29, 2013 Report Share Posted April 29, 2013 (edited) Not so bad then mate wonder what caused it? excessive heat as per norm at the rear of the engine,IE check waterways Edited April 29, 2013 by ntc Quote Link to post Share on other sites
TR NIALL Posted April 29, 2013 Report Share Posted April 29, 2013 Yes will check Waterways,Head was Converted in 1999 and have had no Overheating Problems, im also using ValveMasterPlus the reason behind that is to Cool Volitile Fuel,more Harm than Good maybe. Quote Link to post Share on other sites
TR NIALL Posted April 29, 2013 Report Share Posted April 29, 2013 Hi Tony,sorry for Piggybacking your Thread but the 2 Problems seem the same. Any Result from your Problem yet. Quote Link to post Share on other sites
Guest ntc Posted April 29, 2013 Report Share Posted April 29, 2013 , im also using ValveMasterPlus the reason behind that is to Cool Volitile Fuel,more Harm than Good maybe. Yep never use the stuff after being told unleaded Mu and head not required many years ago Quote Link to post Share on other sites
sandandlime Posted April 29, 2013 Author Report Share Posted April 29, 2013 Hi Tony,sorry for Piggybacking your Thread but the 2 Problems seem the same. Any Result from your Problem yet. No need to apologise and I'm pleased that your problem has been identified so quickly. I've removed the head but haven't seen anything awry at this stage, which doesn't bode so well. Currently I'm debating with myself whether to drop the sump and look at bottom ends from there or if it would be better just to bite the bullet, get the engine out and strip it completely. To be frank I don't really want to that but neither do I want to be here again in a couple of months. On top of that, took the Alvis to a local car club run yesterday morning only to have the top hose start to spray under the bonnet. No great shakes other than the time taken to source a replacement, which I think that I've just managed to achieve. I'll let you know what I find once I decide what to do! Cheers, Tony (in full prevarication mode) Quote Link to post Share on other sites
sandandlime Posted April 29, 2013 Author Report Share Posted April 29, 2013 One thing that I noticed this afternoon was that No. 1 piston was not concentric in the bore with less clearance on the front of the engine. The others were noticably better aligned. Noi bore damage or marking. Significant or coincidence? I'm not sure. Quote Link to post Share on other sites
Andrew Smith Posted April 29, 2013 Report Share Posted April 29, 2013 Photos posted for Niall - see: http://www.facebook.com/media/set/?set=a.4998941406513.1073741828.1089104818&type=1&l=a41eb2122b Cheers Andrew Quote Link to post Share on other sites
stuart Posted April 29, 2013 Report Share Posted April 29, 2013 Been using that warp drive again then Niall! Stuart. Quote Link to post Share on other sites
TR NIALL Posted April 29, 2013 Report Share Posted April 29, 2013 Been using that warp drive again then Niall! Stuart. Need something to keep me on Track . Quote Link to post Share on other sites
TR NIALL Posted April 29, 2013 Report Share Posted April 29, 2013 Photos posted for Niall - see: http://www.facebook.com/media/set/?set=a.4998941406513.1073741828.1089104818&type=1&l=a41eb2122b Cheers Andrew Thanks for Posting the Photos Andrew,maybe of help to someone else. Quote Link to post Share on other sites
ChrisR-4A Posted April 29, 2013 Report Share Posted April 29, 2013 Hi Niall, assuming the valve stem had not partially ceased in the guide which is unlikely after 14 years use then maybe it would be prudent to replace all the guides while the head is off in case another guide is about to fall out. Get head reamed for oversized guides by a good machine shop should fix it. Quote Link to post Share on other sites
Guest ntc Posted April 29, 2013 Report Share Posted April 29, 2013 Hi Niall, assuming the valve stem had not partially ceased in the guide which is unlikely after 14 years use then maybe it would be prudent to replace all the guides while the head is off in case another guide is about to fall out. Get head reamed for oversized guides by a good machine shop should fix it. Good advise above,overstressed and not up to the job Niall Quote Link to post Share on other sites
TR NIALL Posted April 30, 2013 Report Share Posted April 30, 2013 overstressed and not up to the job Niall Bit like Meself at this Stage . Quote Link to post Share on other sites
Tony Millward Posted April 30, 2013 Report Share Posted April 30, 2013 Hi Niall, While you have the head off it may be worthwhile to give it a tweak. There are areas that can be ground that will allow it to breathe better...photo below, compare it with a standard head (yours) and you'll see the difference...this is my head tweaked as per Kas Kastner and yes, it does make a difference. If you want more info...email me my friend....tony@acecom.com.au Cheers Tony Quote Link to post Share on other sites
AndrewMAshton Posted May 2, 2013 Report Share Posted May 2, 2013 Hello, had my resident engineers listen and there is a very strong view it maybe timing, good luck, Andrew Quote Link to post Share on other sites
sandandlime Posted May 2, 2013 Author Report Share Posted May 2, 2013 Hello, had my resident engineers listen and there is a very strong view it maybe timing, good luck, Andrew Hi Andrew, Unfortunately, I don't think it's the timing chain/tensioner - although it may also be an issue! I didn't have the opportunity to get back onto it until today. After much prevarication I opted to drop the sump and see if anything obvious showed-up. Nothing apparent but there is small amount of 'gold glitter' in the oil on the bottom of the sump. Not much perhaps only 50 to 100 grains and very small at that. Can't feel them between my fingers and no larger than 0.25 mm diameter. I removed the cap and bearing to No 1 cylinder and that was all intact without damage. Need longer arms than mine to lift he prison out of the top of the bore whilst pushing from the bottom so haven't checked it's little end bush yet. I did note a small amount of ridging on he crankshaft journal though so it's probably necessary to regrind the crank. Oil pressure has always been fine however. Given the likelihood of crankshaft machining I decided to alter tack and go the engine out route. I've got the radiator, starter and alternator out but the rest will have to wait unil Saturday. At the moment I'm suspicious of little end issues. Hey ho :-( Tony Quote Link to post Share on other sites
TR NIALL Posted May 12, 2013 Report Share Posted May 12, 2013 Head back from Engineers Friday and replaced yesterday,running like a Swiss Watch and Pulling like a Train,Happy Days. Quote Link to post Share on other sites
Guest ntc Posted May 12, 2013 Report Share Posted May 12, 2013 Head back from Engineers Friday and replaced yesterday,running like a Swiss Watch and Pulling like a Train,Happy Days. Result Quote Link to post Share on other sites
sandandlime Posted July 13, 2013 Author Report Share Posted July 13, 2013 Mine was a broken crank. The sound if it comes though right is terminal damage sorry Mine was also a broken crank. So I suppose that does count as terminal damage. Drove around 150 km back home afterwards - very, very gently. Still maintained around 30/40 psi oil pressure at 15-1800 rpm. Decided to ship the car back to the UK rather than rebuild/machine here. Should, hopefully, be back towards the beginning of next month. TR saved but wallet still shaking! Quote Link to post Share on other sites
Ashley James Posted July 13, 2013 Report Share Posted July 13, 2013 I'm very sorry, at least it's a nice simple and sensible engine, so hopefully won't break the bank. I found little bits of grit had gone through the oil pump, so you'll need to clean everything out meticulously. Quote Link to post Share on other sites
sandandlime Posted July 13, 2013 Author Report Share Posted July 13, 2013 Hi Ash, I don't know what caused the crank to break, we were only cruising gently for a couple of nights away, but I suspect that it was either just old age or dodgy machining from the last rebuild (perhaps square rather than rounded corners to the journals? I'll inspect when the broken one returns here). The engine is being sorted by TR Enterprises so should be good for another few years. No high-performance mods just a good sensible touring engine. Fortunately, our Alvis TA14 is still running very nicely so classic days out still on the calendar (although after all the rain and cold it's a tad too hot now in the daytime!). Quote Link to post Share on other sites
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