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Engine Cranking slow but will not start after a timing belt change

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Old Dec 19, 2006 | 08:23 AM
  #16  
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Originally Posted by salimshah
No spark (irrespective of timing) is an electrical issue. Check distributor as a start point.

Salim
GS 98 up does not have a distributor. Will see how else i can do this.
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Old Dec 19, 2006 | 09:16 AM
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Originally Posted by pardesi
Lets say if i'm not getting a spark, could that be becasue the timing is off or is it an electrical issue.
No spark: Electrical issue.
Sounds like these guys know a lot more than me, but maybe this is worth a look.
Have not seen this engine up close, but did you remove the plug wires? Make sure they are installed in the right order. Also, check the ignition coil. I assume it has one of those? Did you replace the water pump? If so, did fluid get on the any of the electrical wires or connections?
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Old Dec 19, 2006 | 09:34 AM
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Here I was explaining terminology and now I am humbled

Just trace the wires from spark plugs going back. Coil sits around the spark plug but it gets enrgised from distributor_like entity.

Salim
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Old Dec 19, 2006 | 03:34 PM
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Originally Posted by salimshah
Here I was explaining terminology and now I am humbled

Just trace the wires from spark plugs going back. Coil sits around the spark plug but it gets enrgised from distributor_like entity.

Salim

Yeah once i take another attempt at resetting the timing belt, which won't be till tomorrow night, and hopefully based on what i've learned here it will run if not i'll trace the wire and recheck the fuses and performe further electronic test.

Let see how it goes.. thnx..
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Old Dec 19, 2006 | 04:14 PM
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Real curious to see if it was off time. Do keep us posted. Good luck
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Old Dec 19, 2006 | 09:11 PM
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Originally Posted by FlavesLex
Real curious to see if it was off time. Do keep us posted. Good luck
Thnx... i'll keep you guys posted... i just read the other thread where the toyota dealer had the timing off and wrecked the valves.
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Old Dec 20, 2006 | 05:34 AM
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I haven't forgot you. My TIS for lexus is down. As soon as it comes up I will get you the info I promissed.
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Old Dec 20, 2006 | 12:01 PM
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pull off the belt and put everything at TDC again, and put it back together.

make sure your spark plug wires are in the right position.

to test for spark, sticka screwdriver into wire #1 and put it near metal and crank. if you see spark then there's spark. its probly somethign electrical even if the timing belt is wrong it will still spark it will just break some valves if its wrong but it will still start

check ALL your fuses too, could be something real stupdi
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Old Dec 20, 2006 | 01:45 PM
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Originally Posted by Bill_GS3
I haven't forgot you. My TIS for lexus is down. As soon as it comes up I will get you the info I promissed.
Great, thanks for the update. Will be looking forward to that info.
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Old Dec 20, 2006 | 02:21 PM
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If you pull off the two cam covers you should be able to check it, this is what you want to see.


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Old Dec 20, 2006 | 02:30 PM
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If you are installing the belt new thsi is what you wan tto see with the markings from lexus.



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Old Dec 20, 2006 | 05:21 PM
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Good drawings, BUT

Bottom pully mark can be off by one turn.

Very unlikely as the crank-shaft does not move easily. So if the crank-shaft has not moved and you bring the cam gears to the right spot by as many turns you should be ok. Warning Do not force the cam gears as the valves can hit the piston [some say it is non-interference engine, but then some one said the valves got bent].

pardesi: The drawings show (imho) that your "R" cam gear is off by 2 notches.

Salim
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Old Dec 20, 2006 | 09:03 PM
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Let me post what it came out to be tonight (first and second image shows R and L lined up with the markings; third image was taken with the mirror on the bottom so you can see that CR on the belt matched the dot; last image shows the dot matched the grove on the gear).

Thanks for the diagrams, very helpful. But i feel my previous attempt was no different then what i did today. I didn't get a chance to put it all together. Will finish it this Friday but have a feeling it maybe something else. I also swapped the spark plug coils with my brother's GS400 and those worked fine. Rechecked all the fuses in the car and those were fine. Lets see what happens when i start it this weekend.

I have bigger picture if someone is interested. Let me know if i'm still off, i haven't spun the engine yet by hand and made sure my first firing piston is at TDC.
Attached Thumbnails Engine Cranking slow but will not start after a timing belt change-lexus.jpg  
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Old Dec 20, 2006 | 09:36 PM
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Originally Posted by salimshah
pardesi: The drawings show (imho) that your "R" cam gear is off by 2 notches.

Salim
I see what you are saying and re looked at the drawings. I think they are contradicting one versus the other. If you see in the top image the timing for the R and L are marked with the straight line. That is what i used when i set the timing in mine. Then in the second image (R blown up) notice where the line is. It is two notches to the right of the line. If you compare that with the images i attached that is no longer that straight line, instead it is the T mark.

So which one.. the straight line mark or the T. I currently have it at the straight line mark and my crank shaft matches perfectly with the belt marking.
Attached Thumbnails Engine Cranking slow but will not start after a timing belt change-lexus1.jpg  
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Old Dec 21, 2006 | 03:53 AM
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Can you take any pictures showing a full frontal view of each of the pulleys?
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