jcwcooper Posted December 27, 2008 Share Posted December 27, 2008 Over the last few days ive been helping my freind fit a new V8 his RRC. The old engine was using carbs and the new engine was EFi. We took the inlet manifold off and plonked the carbs on then popped the engine in. The new engine wasnt herd running but we were assured that it worked and it turned over fine by hand and genrally looks in good nick. When we turned it over it turned over for about 10secs, and then went clonk and stopped. We can turn it back anti-clockwise a few turns and then back clockwise a few turns.......But it locks up both ways. Any Ideas why? we've tryed removing the starter thinking maybe that had jammed but no luck. It turned over before we put it in, We have used the existing flywheel and rocker covers starter water pump alternator ect. any help would be great cheers Dave. Quote Link to comment Share on other sites More sharing options...
maxtherotti Posted December 27, 2008 Share Posted December 27, 2008 could be wrong but it sounds like your timing has jumped badly and pistons are hitting valves take the rocker shafts off and plugs out if it turns over by hand like that then thats your problem chap rob Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted December 28, 2008 Share Posted December 28, 2008 Could be something down a cylinder - did you drop anything down there, or perhaps is fuel leaking in somehow & hydraulicing it? Quote Link to comment Share on other sites More sharing options...
Quagmire Posted December 28, 2008 Share Posted December 28, 2008 Timing is done via a chain so can't really jump unless the timing is totally totally shot, if it was bad enough for that to happen then the rest of the engine would probably need a look anyway. I'd go with Fridge- my brother (whos screen name shall remain secret) once managed to drop a washer into his 2.25 without noticing. That made a bit of a mess. On the v8 forum there are stories of all kinds of things ending up in v8's. Usually the engine keeps running though. Does it turn over without the plugs? That will see if there is some kind of fluid causing it to hydraulic. If still no joy i'd take the rocker assemblies off and see if you have any bent pushrods, remember to keep them in the correct order for refitting. Another thought- could something jamming the oilpump gears stop the engine turning? I guess it could... If this was the case then removing the dizzy should allow the engine to turn as the oil pump gears are then not being driven. I would try to avoid taking dizzy out if you can as getting it back in the right place so that you aren't a tooth out can be a pigdog sometimes. A grownup will correct me shortly. Quote Link to comment Share on other sites More sharing options...
jcwcooper Posted December 28, 2008 Author Share Posted December 28, 2008 Heads havent been off so i wouldnt have thought anything is in there, will try taking the plugs out to see if somehow its been hydrulicly locked. cheers guys Dave. Quote Link to comment Share on other sites More sharing options...
caprice 4.6 Posted December 28, 2008 Share Posted December 28, 2008 Could be a stuck valve take valve covers off and see if any rockers are loose on the compresion stroke or look to be sitting lower then others.Dave Quote Link to comment Share on other sites More sharing options...
steve_d Posted December 28, 2008 Share Posted December 28, 2008 Have you tried turning it over with the clutch depressed to confirm it is not a gearbox issue? It is the 'few turns' statement that has me confused as a hydraulic lock, something in a cylinder or a stuck valve would all result in only about 90% of a full rotation. Steve Quote Link to comment Share on other sites More sharing options...
patch1 Posted December 28, 2008 Share Posted December 28, 2008 Was anything dropped in one of the inlet ports when you changed the inlet manifold? Quote Link to comment Share on other sites More sharing options...
jcwcooper Posted December 29, 2008 Author Share Posted December 29, 2008 its possible going to have another look tonight hopefully Quote Link to comment Share on other sites More sharing options...
jcwcooper Posted January 4, 2009 Author Share Posted January 4, 2009 all sorted now, when we bought the engine it had no exhaust manifolds and looks like whilst it had been sat about someone decided to stick a bolt in there, doesnt look like any of the bolts we had lying about it was only small.......Hasnt done much damage either. cheers Dave. Quote Link to comment Share on other sites More sharing options...
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