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1989 Isuzu Truck Engine cranks but no start

Tiny
ALVINA
  • MEMBER
  • 1989 ISUZU TRUCK
Engine Mechanical problem
1989 Isuzu Truck 4 cyl Two Wheel Drive Manual

Removed and cleaned heads, replaced. Lined up #1 on the pulley crankshaft. Got it all in line with the camshaft. When came time to start camshaft timing runs away. Also, is the firing order 1, 2, 3, 4 or 1, 3, 4, 2?
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Thursday, April 2nd, 2009 AT 10:43 PM

8 Replies

Tiny
JAMES W.
  • MECHANIC
  • 2,395 POSTS
Firing order is; 1-3-4-2.
What do you mean by "the camshaft timing runs away"? Does it shread the belt or what? Please advise.
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Thursday, April 2nd, 2009 AT 11:23 PM
Tiny
ALVINA
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On the turning the camshaft runs away
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Thursday, April 2nd, 2009 AT 11:43 PM
Tiny
ALVINA
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Does it shread the belt or what? No
camshaft jumps out from the #1 position, timing goes off.
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Thursday, April 2nd, 2009 AT 11:46 PM
Tiny
JAMES W.
  • MECHANIC
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Bear with me here, is the cam sprocket slipping on the cam or the belt jumping?


https://www.2carpros.com/forum/automotive_pictures/248092_89_isuzu_1.jpg

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Thursday, April 2nd, 2009 AT 11:59 PM
Tiny
ALVINA
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  • 5 POSTS
No, not slipping on cam or belt
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Friday, April 3rd, 2009 AT 12:03 AM
Tiny
JAMES W.
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Now you have me totally confused. WHAT do you mean by "the camshaft runs away"? The cam can't jump out of #1 TDC position unless either the belt jumps or the cam or crank sprocket is moving.
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Friday, April 3rd, 2009 AT 12:22 AM
Tiny
ALVINA
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Thank you for your help. Will try to check on the belt tomorrow. Thank you.
Alvina
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Friday, April 3rd, 2009 AT 12:33 AM
Tiny
JAMES W.
  • MECHANIC
  • 2,395 POSTS
If you think the belt is jumping a notch or two. Time everything out and mark the belt and sprocket positions with a piece of chalk or something and spin it over. This will gige you a reference point.
It's 1:00am here, I'm going to bed, it's been a busy night.
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Friday, April 3rd, 2009 AT 12:50 AM

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