[urq] Rebuild engine seizes after 15sec's . ( non audi )

Fri Oct 31 04:07:53 PDT 2014

Damn! I hoped that would be it. That is a good tradition to have. Very wise (and usually rewarding too). What else can stop a motor in that space of time? Hydro-lock which you have ruled out. Friction derived seizure - maybe but would it allow restart within 10 mins? Not surprised you are frustrated.
Clutching at straws now: an issue with the starter motor perhaps not disengaging, getting hot and stopping the motor? Then cooling to allow restart. 

When you changed oil grade, did the oil you drained smell of fuel?

What happens if right after it stops you whip the plugs out? Will it turn at all either with s/moter or by hand?

Will keep thinking on it. 
Regards
Keith

Sent from my iPhonem

> On 31 Oct 2014, at 10:46, "Patrick Carlier" <p.carlier at pandora.be> wrote:
> 
> Same thought crossed my mind  ... briefly .
> 
> You see , I never had the muffler on after the rebuild .
> I ran it with the exhaust manifold on and that 's it .
> Bit of a tradition , I like the sound of an engine coming to life
> with no muflers .
> 
> Pat
> 
> 
> ----- Original Message ----- From: "Keith Lloyd" <spotatashleys at hotmail.com>
> To: "Patrick Carlier" <p.carlier at pandora.be>
> Cc: "audifans urq" <urq at audifans.com>
> Sent: Friday, October 31, 2014 10:24 AM
> Subject: Re: [urq] Rebuild engine seizes after 15sec's . ( non audi )
> 
> 
> Further to my rushed post a few minutes (apologies for the smelling pistakes) I have seen this happen before, and it might have caused the initial damaged head problem. I would check flow through the exhaust before going to trouble of tearing down the motor. Perhaps try starting it with main system disconnected from down pipe after making sure down pipe (and e manifold) is itself clear.
> Good luck with it. I'd be incandescent with rage in same situation. Thoughts are with you.
> All the best
> Keith
> 
> Sent from my iPhone
> 
>> On 31 Oct 2014, at 09:18, "Keith Lloyd" <spotatashleys at hotmail.com> wrote:
>> 
>> If pressure builds to them stop the motor and then dissipates to allow a restart, and with no plugs in yiu can turn it forever, is there something silly going on like a blockage on the exhaust side of things - perhaps sound deadening in a silencer (sorry , muffler) that has migrated down the pipe. Engine runs, preasure builds to a seize and stall but then dissipates to allow restart?
>> Just a thought. Its the ability to restart suggests this to me.
>> Hth
>> Keith
>> '87 WR in sunny Worcestershire
>> 
>> Sent from my iPhone
>> 
>>> On 31 Oct 2014, at 08:14, "Patrick Carlier" <p.carlier at pandora.be> wrote:
>>> 
>>> Yes , they match up allright .
>>> I even cranked it manually with the rocker cover removed to check if  the oil comes
>>> out of the lubrication ports .
>>> 
>>> Pat
>>> 
>>> 
>>> ----- Original Message ----- From: "Peter" <audionly at gmail.com>
>>> To: "Patrick Carlier" <p.carlier at pandora.be>
>>> Sent: Friday, October 31, 2014 12:51 AM
>>> Subject: Re: [urq] Rebuild engine seizes after 15sec's . ( non audi )
>>> 
>>> 
>>> Are you sure the oil port or oil head bolt are the same and or match up? We had this issue with an Audi i5 where the configurations were identical except for head oil port which was being blocked by head gasket that didn't match. The symptom is it runs until the cams heat up from lack of oil and it sieges /Peter
>>> 
>>> 
>>> 
>>>> On Oct 30, 2014, at 4:46 PM, Patrick Carlier <p.carlier at pandora.be> wrote:
>>>> 
>>>> So guy's , i'm a bit at wits end here .
>>>> 
>>>> Car is a 1987 nissan coupe , 8 valve carb , 1600cc . ( E16s engine )
>>>> Bought it as a fisrt car for my 17 year old son who's very enthousiastic about it :) .
>>>> 
>>>> It came with a known broken engine , head froze to pieces .
>>>> Found me a 1500 Turbo ( E15ET)  engine with severe big end damage
>>>> The blocks  are identical as are the heads , only the 1500 crank throw is smaller , and the compression is lower .
>>>> 
>>>> With a bit of this and a bit of that I put together a complete engine
>>>> Had the 1500  honed , and the head shaved .
>>>> Used the 1600 pistons and conrods with new pistons rings .
>>>> The 1600 crankshaft was also used with its main bearings shells  in the 1500 caps .
>>>> Bit of a puzzle , i know :) .
>>>> And i've put in new conrod beraings .
>>>> Meaning all moving parts are either new or matched as they were .
>>>> 
>>>> Assembled it all , put it in the car , and fired it up .
>>>> It won't  really idle , most likely a carburettor problem , so I have to rev it a bit , and use the accelerator pump
>>>> to keep it going .I can keep it running at abt 1500 rpm
>>>> 
>>>> It runs for about 15 seconds and then it stalls .
>>>> Dead stop all of a sudden .
>>>> Tried to start again , and the starter engages but fails to  crank the engine .
>>>> Using a wrench at the crankshaft pulley , with the plugs removed , and it barely turns .
>>>> Looking inside shows no sign of hydrolock
>>>> Wait 10 minutes , and all's back to normal .
>>>> Engine fires right up , and seizes again after thesame 15 to 20 sec's time period .
>>>> Plugs are oily when pulled , fresh oil , not burned or carbonized . .
>>>> With a cold engine and the plugs removed I can turn the crank with my bare hands by grabbing the crankshaft pulley .
>>>> Also tried two grades of oil , 10w40 and 20w50 , no avail .
>>>> 
>>>> Now I've done my share of engine rebuilds and I've never seen this before .
>>>> And quite frankly , I don't quite know where to go from here .
>>>> Sure , I need to pull it apart , buit then what ?
>>>> 
>>>> Any thouhts , comments btdt's .....
>>>> 
>>>> 
>>>> Pat
>>>> VERY unhappy for now .
>>>> .
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