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 Post subject: TROUBLE
PostPosted: Tue May 07, 2013 11:45 pm 
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Joined: Sat Mar 23, 2013 2:22 pm
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Location: Ocheyedan, Iowa
Year and Trim: 2002 Pontiac Bonneville SSEi

Member #8782
Had a p0304 code come up recently and felt a loss of power and a knock, so I went into a shop to get it looked at.

Turns out cylinder 4 doesnt have compression :evil:
As of right this moment, it could be a cracked block or head or some other thing, the mechanic believes.

How screwed am i?
Will my engine be worth getting fixed or should I swap?

If it does get fixed, what luck will I have with any mods?

Praying this wont be the end of this car!!

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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 12:05 am 
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I'd first be pulling the rear valve cover to see if the valves are somehow stuck open. That's prerogative #1. Then you can go from there...

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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 12:28 am 
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Obligatory question: What kind of octane fuel have you been using?

If your motor is toast, good used L67's are often the most cost effective option compared to a rebuild.

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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 5:03 pm 
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Location: Ocheyedan, Iowa
Year and Trim: 2002 Pontiac Bonneville SSEi

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WELL!
Just got back from the mechanic...
The block is cracked.

At the moment, I dont know whether or not we'll swap engines, or if I'll be searching for a new Bonneville soon. Ill try and keep posted here

As for octane, I'mm not 100% sure of the rating, but its whatever is premium in Iowa.

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Kelvin VanderVeen
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PERFORMANCE MODS
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APPEARANCE MODS
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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 6:02 pm 
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I would have voted chipped piston. Not sure how one would go about cracking a block on these.

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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 9:23 pm 
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Hmmm rare to have seen a cracked block.. I would have voted for a bent valve or something as well. a stock block would swap in pretty easy if you do decide to keep the car.

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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 9:32 pm 
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My question is how do they know the block is cracked? Its incredibly rare to see this happen to a 3800... 0 compression tells me its a chipped piston as opposed to a blown head gasket or cracked head, with a cracked head or blown head gasket you would have some compression.. My vote is still for a bad piston( I could be wrong )..

So what happens now, being the engine is bad either way?

Also agree with Redzmonte.....


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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 9:46 pm 
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I would also be interested in inspecting it myself if it were my car.. I assume when they told you it had no compression the they ment it was really low. NO compression would indicate a valve (intake or exhaust) was open not allowing any compression. Cracked Block, Cracked head, blown Gasket and chipped piston should show a Low reading but still some sort of compression, and i would assume you would see some oil/coolant smoke from the exhaust. A Borescope would easily see the "F-ed" piston.. and only take about 3 min to check.

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Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...


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 Post subject: Re: TROUBLE
PostPosted: Wed May 08, 2013 11:07 pm 
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I too am curious as to how they know it's a cracked block...

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Sirius wrote:
Think about it. You’re tooling down the road in your Prius, knowing full-well that this thing being green is as big a sham as federally mandated ethanol-enriched gas, Russia pulling out of Ukraine, and Obamacare.


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 Post subject: Re: TROUBLE
PostPosted: Thu May 09, 2013 8:38 pm 
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Location: Ocheyedan, Iowa
Year and Trim: 2002 Pontiac Bonneville SSEi

Member #8782
CORRECTION!

You guys were right, the block isn't cracked, somehow they had mistaken my car for another (I dont know how, it was a mazda) and told my otherwise.

Anyway, the cylinder/piston is chipped, which is whats causing the compression problems.

Right now, with all the trouble with that Bonneville, (headliner falling, sunroof leaking, chips, dents, etc) I'm actually planing on buying a new Bonneville, and looting what I can from the old. Maybe I'll have some things available for sale!

Im looking at one at the moment, its a burgundy ssei 2002. looks pretty spiffy. Its a salvage title, but apparently it was only rear ended, and the bumper has since been replaced.

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Kelvin VanderVeen
Image
PERFORMANCE MODS
180 DEGREE THERMOSTAT, AUTOLITE 104'S, ZZP VOLTAGE BOOSTER
APPEARANCE MODS
LED INTERIOR LIGHTS, TAN INTERIOR TRIM, CLEARED CORNERS
:bpylons:


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 Post subject: Re: TROUBLE
PostPosted: Thu May 09, 2013 10:05 pm 
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Location: S Carolina
Year and Trim: 2000 bonneville sle , 2002 gtp
I would of guess a chipped valve,just the other day my friend tore of a head to see part of a valve missing.

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