3000gt timing,low compression,no start


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3000gt timing,low compression,no start

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

iceman
User

Apr 7, 2008, 7:54 PM

Post #1 of 4 (4336 views)

3000gt timing,low compression,no start	Sign In

Just found out lifters were bad just replaced them put the engine back together and now still no start car gets fire and gas. I did a compression test and found the No.1 and 2 and No.6 chambers were 80psi the No.3 and 5 were at 150psi and the number 4 is 110psi. Does this mean the timing is still off or a bad head gaskest or piston. i noticed the tming looked like it could be off about a centimeter(so close it should have worked) but i did't think it was this bad off to do this. Can someone help me?

brbettge
User

Apr 8, 2008, 12:19 PM

Post #2 of 4 (4321 views)

Re: 3000gt timing,low compression,no start	Sign In

most likely the time belt is off by one tooth. hopefully you haven't bent valves. remove the time belt cover and double check the time marks.

iceman
User

Apr 8, 2008, 12:33 PM

Post #3 of 4 (4316 views)

Re: 3000gt timing,low compression,no start	Sign In

I'm hoping it is the T-belt.Because when i put it on it looked like it could have been a little bit(much less than half tooth) off. So i tried it and now low compression. I hope it's not the rings or a warpped head

brbettge
User

Apr 8, 2008, 2:00 PM

Post #4 of 4 (4317 views)

Re: 3000gt timing,low compression,no start	Sign In

no more than you have done the rings will be fine, no chance of damage. the head will not be warpped either. the only thing that could be is that the time belt was off enough that the valves hit the pistons on revolution. if this happened it will have bent the valves (most likely exhaust valves) which will cause little if no compression on one or more cylinders. I still believe you may have the belt off by one tooth. best to check again VERY closely and verify. let me know, rick ase master tech.

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