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Formule su propia pregunta a Hernan
Hernan, Técnico 20 años
Categoría: Coche
Clientes satisfechos: 2040
Experiencia:  Jefe de Taller
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1999 Nubira does not start. I bought this car without cylinder

Pregunta del cliente

1999 Nubira does not start. I bought this car without cylinder head. I installed a rebuilt cylinder head. I assumed cam shafts can be installed in either side while you keep the relation between intake and exhaust. I also assumed that caps that goes over the valves can be installed in any sequence. It looks like it going to start but it won't and does some backfiring thru the throttle.
Enviada: hace 7 años.
Categoría: Coche
Experto:  Hernan escribió hace 7 años.
Hi dear friend, did you make an engine compression test? please let me known.

Best Regards.

att. Xavier
Cliente: escribió hace 7 años.
Yes. 150 psi per cylinder.
Experto:  Hernan escribió hace 7 años.
Ok friend, the car must be run without problems, mabye you have a problem with the crankshaft position sensor, please check this with an scantool when you try to start the engine the engine rpm must fluctuate between 100-250 rpm, i suggest to make an Crankshaft Position Variation Learning, this is a procedure that must be done with Tec 2 scanner, it will record the relation between the Crankshaft Position Sensor and Cmp sensor, this procedure must be done always that you disconnect the battery, by the way the scanner can say some code if some is wrong. i have the service manual if you need some technical question.

Best Regards:

PD: Please take my response and provide me a positive feedback if you considere helpful for you

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Cliente: escribió hace 7 años.

There is another problem. There is no oil pressure. I removed the oil pan and clened the oil strainer which was clogged. That is why I did try to start the engine, I supposed more RPMs will charge the oil pump. I also removed the screw in the part beside the oil filter (is it a regulator?), any way, there was no plunger inside. Does it matter?

Experto:  Hernan escribió hace 7 años.
Hi friend, right this is a valve, i think the problem for oil pressure comes from the oil pump, the valve must be open, please check this.

Best Regards.