Changed timing chain now smoke and power loss - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-26-2007, 08:18 AM   #31
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I'm thinking along the same lines as Dame on this one.

Although, there'* no way you can destroy the bottom end (low oil pressure) by changing a timing chain to my knowledge. As for the white smoke, is there only a little? If so..it'* probably the oil and dirt burning off where you were working.
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Old 03-26-2007, 09:20 AM   #32
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Harmonic balancers don't cause a loss of power when the rubber breaks loose. Clanking yes, power loss, no.
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Old 03-26-2007, 09:55 AM   #33
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Quote:
Originally Posted by osubuckeyes
Ever find out about that one tooth off deal? I saw in one of your posts you used a tool to tell you were off without ripping it apart? How do I go about this and where do you hook up the tool at?
Yeah, I figured it out. Learning to use an oscilloscope is way outside the scope of the club. If you happen to have one, and happen to know how to use it, You can watch the crank trigger for 5V spike at 18X RPM. Even more fun with dual trace and the cam trigger.
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Old 03-27-2007, 11:58 PM   #34
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Hello all,
This is a complete sum up of everything that has happened as some new stuff has changed.
Replaced supercharger a month ago. The cam magnet broke off my cam sprocket. Changed cam sensor, magnet, timing set, new timing cover gaskets, new oil switch. I had a previous post on this but the problem has seriously worsened. Service engine light went out when i fired it up after doing this. Ran smooth at first when cold. When it got hot started to run bad, lose power, smoke out of timing cover engine. I found out I forgot one bolt. This fixed the smoke problem at the moment. Still ran bad and continuosly got worse. Last night it finally died and wouldnt start back up. Smoke rolled out my heater vents for a half hour straight. Someone thought my Catalytic converter was clogged. I cut it off today and put in a straight pipe. Still wouldnt start. Turning over though. Can smell gas. Checked plugs. Fouled bad. Changed plugs. Now still wont start and smoke coming from where seems to be exhaust manifold when I try to start it. Any ideas. Some are saying timing is off, but I am 99.9% sure I got it right. Plus it ran smooth as a new bonnie at first when I initially started it after changing timing set. Any help is appreciated.
Thanks,
Jon
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Old 03-28-2007, 05:44 AM   #35
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What'* the code? There should be a soft code stored for this.

With out touching the engine I'm going to have to lean even heavier on the timing chain based on recent events.

Thinking about it more the 'clanking' may be severe pre-ignition, hence the fouled plugs. If the chain is retarded more than the PCM can deal with this fits in perfectly.

My advice right now is to pull the front cover back off and double check those timing marks. Use a straightedge.
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Old 03-28-2007, 07:31 AM   #36
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Ok, if the only thing changed/touched was the timing set, I'm 100% with Dame. The first rule of thumb is to go back over what you last changed.

Was anything else touched on the car in the last 6 months? Please list it all....even oil changes.

As for smoke pouring off the outside of the motor, unless you have cracked exhaust manifolds, or oil/grease on them... The smoke has no where to come from. It'* either crap burning off the manifolds, coolant leaking/buring off or it'* exhaust coming out.

Smoke coming out of the heater vents, why at this point is the blower motor even on? If you have smoke pouring off the motor, you are probably dragging it into the car or something seriously burned up under the dash. What does it smell like? Burning wiring or the motor smell?
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