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teg8254
User
Feb 7, 2009, 7:17 PM
Post #1 of 7
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I have a 1989 toyota 4x4 3.0 and had my heads rebuilt cause I burnt a valve.Ive got it back together and it doesnt want to start ,acts as tho its out of time. I can get it to start if I move distributer a notch but still acts out of time.I took it back apart to verify my timing belt, camshaft sprockets and crankshaft are perfectly lined up.Im missing something and am at wits end.Not my first time either.maybe my forth. any ideas?Heads were done by a reputable shop who have been in the business a long time
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Loren Champlain Sr
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/ Moderator
Feb 7, 2009, 7:38 PM
Post #2 of 7
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Re: rebuilt heads
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Cam timing is very critical. Off one tooth, anywhere, and you'll get these results. Assuming the cam timing is perfect, tight valves can cause a 'retarded' seeming symptom. Also, make sure the distributor is in correctly. On compression stroke on #1, timing mark at TDC, rotor should be pointing exactly at #1 on the dist. cap. Could be off a tooth and just not have enough adjustment to advance the timing far enough.
Loren
SW Washington
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teg8254
User
Feb 7, 2009, 7:50 PM
Post #3 of 7
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Re: rebuilt heads
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Im certain my marks are on.#1 is up.I was wondering if it were possible there could be a problem with new heads
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Loren Champlain Sr
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/ Moderator
Feb 7, 2009, 8:00 PM
Post #4 of 7
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Re: rebuilt heads
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I doubt that it is the heads that is the problem. Make certain that you are on #1 on the compression stroke. (remember the crank goes around twice) Make certain that the distributor is installed correctly. Check valve clearances. Cold: Intake .007-.011 Exhaust: .009-.013... 
Loren
SW Washington
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teg8254
User
Feb 7, 2009, 8:20 PM
Post #5 of 7
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Re: rebuilt heads
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My valves were adjusted at rebuild shop.I dont wont to go back that far if I can avoid it.How can I be absolutly sure im on compression stroke.My #1 piston is up and timing mark is on zero
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teg8254
User
Feb 7, 2009, 8:26 PM
Post #6 of 7
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Re: rebuilt heads
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keep in mind i installed heads when #1 was cylinder was up.Could I have one head on compression and one on exhaust? is that even posible
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Loren Champlain Sr
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Feb 7, 2009, 8:41 PM
Post #7 of 7
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Re: rebuilt heads
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There is only one #1 cylinder. I'll attach a firing order for you. Remove #1 spark plug, disable ignition so that you won't get hit by 30,000 volts, have someone 'bump' over the engine for you in very quick on/off bumps until you feel a push of air coming from the spark plug hole. That will be your compression stroke. Then, align the crank mark to TDC, then check your distributor. Note: Firing order 1-2-3-4-5-6 -------OOPS..Pic didn't come thru.
Looking from
Front of engine: 1 3 5 (pass. side)
2 4 6 (driver side)
Loren
SW Washington
(This post was edited by Loren Champlain Sr on Feb 7, 2009, 9:46 PM)
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