Ahoysandy Posted May 16, 2016 Share Posted May 16, 2016 Hellpp!! My engine seized on me today whilst running. Found out it chewed through all my oil and started a light knock knock, topped her back up and she was good till it locked up halfway down the motorway this afternoon... What do I do? I've tried manually turning it over as well as rolling and dumping the clutch and can confirm, seized. Who do I take it to? Does anyone know of a Datsun engine specialist in Sydney? L26 1976 260z 2seater manual. Quote Link to comment Share on other sites More sharing options...
andyk_79 Posted May 16, 2016 Share Posted May 16, 2016 MIA at Dee Why or Stewart Wilkins racing are the 2 best L engine builders in Sydney Quote Link to comment Share on other sites More sharing options...
Brabham Posted May 16, 2016 Share Posted May 16, 2016 +1 for those two Quote Link to comment Share on other sites More sharing options...
Administrators gav240z Posted May 17, 2016 Administrators Share Posted May 17, 2016 Right now there is nothing you can do, if it's seized it needs a rebuild. There is no 'cheap fix'. Andrew_L26 1 Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 17, 2016 Author Share Posted May 17, 2016 Yeah these are the two shops that have been suggested to me across social media. My current solution is to source an L series to swap in to it for the mean time (as it does have a full year of rego) just to keep it going for weekends. And have the seized engine rebuilt and upgraded on the side to put back in later on. Currently trying to source an engine from someone on the forums hopefully. Thanks for your responses guys, much appreciated <3 Quote Link to comment Share on other sites More sharing options...
d3c0y Posted May 18, 2016 Share Posted May 18, 2016 Don't forget to put oil in this one... Andrew_L26 1 Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 19, 2016 Author Share Posted May 19, 2016 Don't forget to put oil in this one... YES!! haha it will surely be checked more than often Quote Link to comment Share on other sites More sharing options...
Moderators PB260Z Posted May 20, 2016 Moderators Share Posted May 20, 2016 MIA at Dee Why or Stewart Wilkins racing are the 2 best L engine builders in Sydney Have never heard a bad word about either James & Stew. Are you looking a standard rebuild or something more ? Cheers PB Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 21, 2016 Author Share Posted May 21, 2016 Have never heard a bad word about either James & Stew. Are you looking a standard rebuild or something more ? Cheers PB at the moment, I have sourced an L24 to drop in to it for the rest of the year (as i only just put full registration on one week ago). whilst this is getting me along i will be in contact with SW motorsport to build a proper street engine for the Z. Nothing over the top, but some nice triples and a few internal goodies would be awesome. Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 25, 2016 Author Share Posted May 25, 2016 UPDATE:upon draining oil and pulling the engine, i've found small metal particles almost like shavings in the drained oil. thoughts? Quote Link to comment Share on other sites More sharing options...
dattocam Posted May 25, 2016 Share Posted May 25, 2016 Bearing pick up. Quote Link to comment Share on other sites More sharing options...
1600dave Posted May 25, 2016 Share Posted May 25, 2016 Yeah, that's what is left of your bearings Pull the sump, remove the conrod and main bearing caps and check out the rest of the carnage to see if the crank is salvageable. Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 29, 2016 Author Share Posted May 29, 2016 the struggle continues!I think i've narrowed it down to rings or bearings that went in the engine.Anyway.I dropped in another L24 to my Z in an attempt to get it back moving on the road but i can't get it to start now. i'm using all of my existing accessories from the L26 including carbs & headers. i've run over nearly every possibility and can't understand why its not?!Here's the run down;parts that were previously running on my L26 and have been transferred to the L24:-fuel pump-coil-distributor-thermostat-oil pressure sender-alternator-flywheel/clutch assembly-starter-extractors-manifold-twin SU carbs + linkage-fuel railFuel is flowing to the carbs when cranked and bowls are full, no water visible in these upon inspection.Spark is present at both the points in the distributor and each spark plug when grounded on the head.Compression of each cylinder is good and valves/ports are sealing correctly.Have removed the Dizzy and spindle is correct position when cylinder 1 is on TDC.Checked the firing order 1,000 times - 1 5 3 6 2 4.Have charged the Battery to 100%.Removed the kill switch to prevent issues.Oil level on the dipstick is still high, and still clear with no sign of coolant or water.Situation-The engine cranks and turns but does not fire on its own accord. When I begin to squirt fuel in to the carbs, it then wants to fire and will fire for a few turns but as soon as i let go of the ignition, it wont run on its own. If i check the sparks after trying to start it, they appear dry. Which makes me think is a fuel issue, but i'm not familiar as to where as there's fuel in the bowls and the carb set up was working completely fine on my L26. when i add fuel directly to the cylinder through the spark plugs, nothing at all in the way of detonation. Possible issues i thought of were a vacuum leak, cause it to not pull the fuel through in to the cylinder. This could be due to the use of an older manifold gasket.option two is the lack of back pressure from the exhaust that is not creating circulating pressure. This due to the open headers i have at the moment.Any other advice would be much appreciated!!thanks Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted May 29, 2016 Share Posted May 29, 2016 Check your timing is not 180deg out. Retro Z 1 Quote Link to comment Share on other sites More sharing options...
Retro Z Posted May 29, 2016 Share Posted May 29, 2016 Have you set the timing? Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 29, 2016 Author Share Posted May 29, 2016 Check your timing is not 180deg out. I have tried positioning the leads 180 degrees around the dizzy. nothing, if anything it feels as though there's less chance of it firing. Have you set the timing? timing on the dizzy? no, but the adjustment allowance on the dizzy shouldn't be enough to prevent it from firing. it theoretically should run, just like an absolute dog without timing. Quote Link to comment Share on other sites More sharing options...
oldmates260z Posted May 29, 2016 Share Posted May 29, 2016 Sounds like a fuel problem if squirting fuel gets it to fire.... Are you sure the L24 was running Ok before removed? Quote Link to comment Share on other sites More sharing options...
Moderators PB260Z Posted May 30, 2016 Moderators Share Posted May 30, 2016 Just a crazy thought, and an easy mistake. Have you got the leads the right way around, ie Anti Clockwise ? oldmates260z 1 Quote Link to comment Share on other sites More sharing options...
Cozza Posted May 30, 2016 Share Posted May 30, 2016 Are you speaking from experience PB Quote Link to comment Share on other sites More sharing options...
Retro Z Posted May 30, 2016 Share Posted May 30, 2016 Get a timing light on it. Dizzy might be installed a tooth out. Mine was way out and i had to crank and crank， but once correctly set to around 15 degrees advance fires right up even when cold. Worth a shot and has to be done eventually anyway. Quote Link to comment Share on other sites More sharing options...
Retro Z Posted May 30, 2016 Share Posted May 30, 2016 Also do you have 12v at the coil+ while cranking and when the key is in ON position Quote Link to comment Share on other sites More sharing options...
Moderators PB260Z Posted May 30, 2016 Moderators Share Posted May 30, 2016 (edited) Are you speaking from experience PB Hmmm, I have no idea what you mean ;-) Edited May 30, 2016 by PB260Z Quote Link to comment Share on other sites More sharing options...
Ahoysandy Posted May 30, 2016 Author Share Posted May 30, 2016 We got it sorted!! i was fiddling around a little and used a bit of Nulon 'Start Ya Bastard' in the carbs and that helped it want to fire EVEN more and almost run on this alone, which made me think its not likely timing but instead fuel. checking all my lines i found a small leak between the pump and the rail which i clamped up with some new hose. It now RUNS!! must've been a fuel pressure leak, i mean, i runs horribly because theres no exhaust and hasn't been timed, but i'll get to that soon thanks for the help here guys, i'll no doubt be back soon in this thread when the next problem occurs! Quote Link to comment Share on other sites More sharing options...
Moderators PB260Z Posted May 30, 2016 Moderators Share Posted May 30, 2016 Good result, great feeling when find the cause of a problem. Cheers PB Quote Link to comment Share on other sites More sharing options...
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