2003z Posted April 24, 2007 Share Posted April 24, 2007 I finally got my engine all back together and in the car and got to the point of starting it. It cranked for about 5-10 seconds then stopped. I thought it was the battery, but I've had it on a charger for over an hour and still nothing. I can see the engine move a little when the starter teeth engage the flywheel, so the starter is def. moving. Is it possible for the engine to sieze with only turning that long? Is there a way to check if its siezed without pulling it and taking it apart? What should I do next? thanks in advance Quote Link to comment Share on other sites More sharing options...
JSM Posted April 24, 2007 Share Posted April 24, 2007 Try another battery first. Easy check. If that doesn't do it see if you manually turn the motor over off the crank bolt in the front. Carefully though. Quote Link to comment Share on other sites More sharing options...
2003z Posted April 24, 2007 Author Share Posted April 24, 2007 I did try to turn the engine manually with the main pulley bolt and couldn't move it. Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted April 24, 2007 Share Posted April 24, 2007 Are you sure your timing is set right? did you build the motor? If the timing is off at the cam then you may have piston hitting valve:cry2:. Also did you check your main bearing clearances (2thous play if I remember right). maybe your starter is locked up on the fly wheel. I'm just thowing out stuff... are you running FI if so could you be hydro-locked? I hope this helped Matt- Quote Link to comment Share on other sites More sharing options...
JSM Posted April 24, 2007 Share Posted April 24, 2007 Possible break internally on the clutch or tranny when you dropped it? Dumb question, it is out of gear right? Any difference w/ the clutch pushed in? Did it turn over freely by hand before you installed it? Did you pull the plugs to turn it over by hand? Also pull the starter off and then try to turn it by hand. Maybe the starter is locked up. Quote Link to comment Share on other sites More sharing options...
2003z Posted April 25, 2007 Author Share Posted April 25, 2007 pulled the starter, the plugs and the valve cover. The cam isn't frozen, as I can move it slightly, but the #6 cylinder had some FOD in it. Looks like one of the valves (forward one, not sure if intake or exhaust) hit the tip of the spark plug, as that appears to be what was broken off looking at the plug. Definitely need to pull it and tear it apart. Maybe the shop that assembled my head didn't attach a valve properly? Its an N42/P90 with a 1mm head gasket, but I should still think a valve shouldnt hit the spark plug at any time. Quote Link to comment Share on other sites More sharing options...
JSM Posted April 25, 2007 Share Posted April 25, 2007 That sucks. At least you found it. I had a similar problem once. I think the spring retainer came off. Mine ran but very poorly. What is FOD? Quote Link to comment Share on other sites More sharing options...
2003z Posted April 25, 2007 Author Share Posted April 25, 2007 That sucks. At least you found it. I had a similar problem once. I think the spring retainer came off. Mine ran but very poorly. What is FOD? sorry, aviation term for Foreign Object Damage. Any piece of trash laying around on the ramp that can get ingested into an engine and break it. Quote Link to comment Share on other sites More sharing options...
slownrusty Posted April 25, 2007 Share Posted April 25, 2007 Mike - There is no way a fresh engine would "seize" after only 5-10seconds of revolution. As mentioned by Zeiss something is hitting valve to piston makes sense. Let us know...keep us posted, good luck! Yasin Quote Link to comment Share on other sites More sharing options...
ktm Posted April 25, 2007 Share Posted April 25, 2007 Damn Mike, sorry to read that you are going to have to tear it all down again. I am praying that I will not suffer the same fate once I get my engine installed. While I am not doing any headwork or replacing the head gasket, I am a little concerned about the gasket (no reason, only paranoia). Quote Link to comment Share on other sites More sharing options...
2003z Posted April 25, 2007 Author Share Posted April 25, 2007 Mike - There is no way a fresh engine would "seize" after only 5-10seconds of revolution. As mentioned by Zeiss something is hitting valve to piston makes sense. Let us know...keep us posted, good luck! Yasin I think it was valve to spark plug, as the plug is pretty mangled, and then part of the plug probably wedged between the piston and cylinder. Next step is pull and disassemble, and look for a cheap, running engine here in Atlanta to get my by for Zdayz next month, while I redo this one again. Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted April 25, 2007 Share Posted April 25, 2007 What a bummer!!! Sorry for your trouble. Didn't you drop your engine not to long ago? If so do you think maybe something might have broke? There's no way a valve should ever come in contact with the spark plug. the valve would have to be seriously bent or the park plug would have to be bent (I don't even know if thats possible). Get the head off and let us know what went wrong. Good luck we'll be root'n for ya! Matt- Quote Link to comment Share on other sites More sharing options...
2003z Posted April 25, 2007 Author Share Posted April 25, 2007 it did fall over, but it landed on the other side, and I see no way that could bend a valve or spark plug. Will try to pull it tomorrow if I have time. Quote Link to comment Share on other sites More sharing options...
2003z Posted April 25, 2007 Author Share Posted April 25, 2007 just looked at it again, and the valve definitely has to be bent. I can see it right next to the spark plug hole, and it should be on the other side of the engine. After I assembled it, I turned the whole thing a few revolutions via a wrench on the crankshaft, so there shouldn't have been interference. Quote Link to comment Share on other sites More sharing options...
GrommitZ Posted April 25, 2007 Share Posted April 25, 2007 Sorry to hear about that. I'll hope for the best. Good thing it never started. BTW, thank you for your seat writeup. If it wasn't for you I wouldn't have swapped in my driver's seat. Quote Link to comment Share on other sites More sharing options...
sweetleaf Posted April 25, 2007 Share Posted April 25, 2007 That suck.. I bet one of the valves came loose when it fell. (Popped a retainer.) Then it slid down and bent towards the spark plug, when the piston came up .. ) : Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted April 25, 2007 Share Posted April 25, 2007 Maybe you should take to back to the assembler and let him take it appart? Just to be able to have him see as-is you know? So you can have him fix it if it was caused by something he missed or did incorrectly. Quote Link to comment Share on other sites More sharing options...
2003z Posted April 26, 2007 Author Share Posted April 26, 2007 I lost the exhaust valve in the #6. It cracked in half, and I'm pretty sure it was my fault. When I was first putting it together, I misjudged TDC on the cam and was slightly off. (I didn't understand how that alignment mark worked up by the cam sprocket) I put in 2 center head bolts to do the timing chain and heard something pop. I took it off and inspected everything, but didn't see any damage, so I just thought it was the head settling on one of the two centering rings, but I think I cracked the valve stem, and it gave out when I tried to crank it. So, it looks like I'll be ordering a new piston and an intake and exhaust valve for that cylinder. At least its not too major, other than the head rebuild again. Quote Link to comment Share on other sites More sharing options...
JSM Posted April 26, 2007 Share Posted April 26, 2007 Ouch. I would think you would need only to do those 2 valves at the most. Why the whole head rebuild? even the piston may be savable with a little grinding no? A few marks shouldn't hurt performance that bad. Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted April 26, 2007 Share Posted April 26, 2007 When I was first putting it together, I misjudged TDC on the cam and was slightly off. (I didn't understand how that alignment mark worked up by the cam sprocket) Tell me about it, I ran into this problem earlier this week trying to figure those stupid marks out. Quote Link to comment Share on other sites More sharing options...
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