Re: replacing timing chain on 1998 dakota 2.5 liter

From: Wilbur (bwgreen@ocean.otr.usm.edu)
Date: Thu Jan 15 2004 - 00:35:02 EST


Hiya Tony,

Hmm...no non-normal noises that I could hear very easily over the sounds
of the engine shuddering and missing....but I will listen to it again
tomorrow as well as try to pressurize cyl #1 at TDC to check for leaks
as Aaron suggested. I will also pull the valve cover and check the
rockers on cyl #1 at TDC--and if I have time, pull the timing cover and
check the alignment of the sprockets as Jon suggested. Thanks again
guys. You all have been incredibly helpful. :) Here I was thinking
that the timing chain going south was gonna be bad...but considering
that the heads might be blown or worse...well the timing chain ain't
looking so tough now. :) As always I am hoping for the best.
Exploratory surgery tomorrow on my baby....providing the weather does
not interfere.

Wilbur

Tony Troidl wrote:

> mine broke a piston on Cyl 1! so who knows...
>
> did you hear any noises that were not normal when it was running???
> Tony.
> ----- Original Message -----
> From: Aaron Wyse <awyse@sw.rr.com>
> To: <dakota-truck@dakota-truck.net>
> Sent: Wednesday, January 14, 2004 10:18 PM
> Subject: Re: DML: replacing timing chain on 1998 dakota 2.5 liter
>
>
>
>>
>>----- Original Message -----
>>From: "Wilbur" <bwgreen@ocean.otr.usm.edu>
>>To: <dakota-truck-moderator@bent.twistedbits.net>
>>Sent: Wednesday, January 14, 2004 7:33 PM
>>Subject: Re: DML: replacing timing chain on 1998 dakota 2.5 liter
>>
>>
>>
>>>Bah, I should have checked the cylinder compression first....Well thanks
>>>for the help you guys have given me already...you saved me from dropping
>>>more money on the wrong parts. I disabled the fuel pump, grounded the
>>>coil, removed all the spark plugs, and hooked a cylinder pressure tester
>>>up to each of the cylinders in turn...very interesting what I
>
> discovered:
>
>>>Cylinder 1 no pressure what-so-ever...nada...zip
>>>
>>>Cylinder 2 ~160 psi
>>>
>>>Cylinder 3 ~135 psi
>>>
>>>Cylinder 4 ~142 psi
>>>
>>>Each of the last 3 cylinders at least sounded like there was compression
>>>as I cranked it over...on the first one, there was no sound of
>>>compression...
>>>
>>>I have not been able to detect any oil in the radiator or water in the
>>>oil...but maybe I should look harder by releasing some of each into
>>>containers to examine them in more detail....So where is all the
>>>pressure going from cylinder 1? Possible cracked block, or blown
>>>valves? Any idea the best way to proceed from here? Is there a better
>>>way to isolate where the pressure in cylinder 1 is escaping to? Sounds
>>>like I need to do some exploratory surgery. :) Any suggestions where
>>>to start?
>>>
>>>Wilbur
>>
>>If you have an air compressor.. Put #1 @ TDC and pressurize(well have it
>>try to anyway) that cylinder.. listen for where your air is going.. check
>>cooling system for bubbling. oil fill cap for hissing.. listen at the
>>throttle body..
>>See if you can have a better idea as to where the problem is before you
>
> tear
>
>>into it.
>>Aaron Wyse
>>
>>
>
>



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