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Old 04-19-2007   #1
Don Nelson
 
Join Date: Aug 2005
Location: Anchorage
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Default Re: Clunk!

I think around the 1st. It's an award she received from her employer, so I don't have much to do with the arrangements...just along for the ride!
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Old 04-19-2007   #2
Jeffvette
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Default Re: Clunk!

Plenty of things to do. June is a pretty good time to be here. A few hot streaks, but for the most part the days are comfortable.
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Old 04-19-2007   #3
Z Factor
 
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Join Date: Dec 2003
Location: S. Florida
Posts: 2,647
Default Re: Clunk!

Hello Don, glad to see you posting

I would take Jeff's advice, and don't run it until you check the fluids, plugs etc. You don't want a hydro-lock.

Keep us posted on your progress and feel free to ask for more help.

As to visiting Seattle in June,,,hmmm June + Seattle = RAIN
Actually ,,,, any month + Seattle = RAIN

When you have a moment zip over to this thread and cast a vote for Alaska.

http://zr1netregistry.com/forum/showthread.php?t=1009



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Old 04-20-2007   #4
flyin ryan
 
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Location: Edmonton, Alberta or Phoenix, Arizona
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Default Re: Clunk!

i would do a leakdown test if you don't find something obvious. have never done one on an LT-5 but it has to be as easy as it gets. pull the plugs & bring the hole your working on to TDC. i'm not sure if the damper is marked in 90° incriments or not? if not slide something down the spark plug hole & by turning the engine over by hand you'll be able to get real close. then have at err'. can walk you through it in more detail if you need, no problem.
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Old 04-20-2007   #5
Don Nelson
 
Join Date: Aug 2005
Location: Anchorage
Posts: 6
Default Re: Clunk!

Okay...the plot thickens...

I pulled one sparkplug to test the compression, but when I turned the engine over it locked again...so, I pulled all the spark-plugs and turned it over again. This time the second cylinder on the 2nd (passenger side) bank spewed fuel all over the place! After cleaning that mess up, I tried it again with a clean rag over the spark-plug hole and checked the rag (after it blew against the wall). It's pure fuel, but a lot of it. BTW: There does not appear to be any cross contamination between antifreeze and oil.

So...is this a fuel injector problem...fuel rail...throttle-body?
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Old 04-20-2007   #6
Jeffvette
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Default Re: Clunk!

Sounds like you may have an injector stuck wide open. Which can cause hydro-lock and be very bad. Look at replacing all the injectors.
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Old 04-20-2007   #7
Z Factor
 
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Location: S. Florida
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Lightbulb Re: Clunk!

Quote:
Originally Posted by Don Nelson

So...is this a fuel injector problem...fuel rail...throttle-body?
The good news is that it is probably a leaking or stuck injector. The bad news is that it is probably a leaking or stuck injector.

In all seriousness, you will have to at a minimum replace the one faulty injector. That will be the least expensive route for you. However, you should know that the other injectors could start to leak (if they aren't already) or get stuck open. Since you are in Alaska and "not a mechanic" you will only want to do this job once since it entails taking off the plenum, fuel rails, etc.
So I would recommend that you replace all your injectors now rather than hope the others will last for a few more years. Keep in mind that you can just replace the faulty ones and may not have a problem with the others for a while. But for your peace of mind and possible cost savings if you have someone else do the job, replacing them all will probably be your best bet.

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Old 04-20-2007   #8
tccrab
 
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Location: Folsom CA
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Default Re: Clunk!

Quote:
Originally Posted by Z Factor
The good news is that it is probably a leaking or stuck injector. The bad news is that it is probably a leaking or stuck injector.





I predict a plenum pull in your very near future.

I'm sure one of us wouldn't mind flying up there for a weekend to help you with the job, providing of course a hunting or fishing trip could be added to the package...
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Old 04-21-2007   #9
flyin ryan
 
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Default Re: Clunk!

Quote:
Originally Posted by Don Nelson
Okay...the plot thickens...

I pulled one sparkplug to test the compression, but when I turned the engine over it locked again...so, I pulled all the spark-plugs and turned it over again. This time the second cylinder on the 2nd (passenger side) bank spewed fuel all over the place! After cleaning that mess up, I tried it again with a clean rag over the spark-plug hole and checked the rag (after it blew against the wall). It's pure fuel, but a lot of it. BTW: There does not appear to be any cross contamination between antifreeze and oil.

So...is this a fuel injector problem...fuel rail...throttle-body?
this is a best of a worst case scenario. drain the oil to see how much got past the rings. you might have got away very lucky. and that's O.K.
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