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G

·
Discussion Starter · #1 ·
ok,
I have a 97 Mercury Cougar with a 4.6 v8 in it, when you crank the
engine the thing backfires through the throttle body. Which leads me to
believe that the timeing chain has slipped and its jumped time. I called a
local shop to see if they would fix it, the asked if it was Over head cam
and I said yes they said they wouldnt fix it. Is this car worth the time
and money of fixing it?
 
G

·
Discussion Starter · #2 ·
These engines have two timing chains and are what is known as "interference
cycle".... meaning the valves and the pistons occupy the same space at
different times. If timing has jumped, you are looking at some bent valves
and, possibly, damaged pistons.

YMMV..

FWIW, I'd likely perform at least a compression test and code scan before I
jumped to too many conclusions.


"Adam" <[email protected]> wrote in message
news:[email protected]
> ok,
> I have a 97 Mercury Cougar with a 4.6 v8 in it, when you crank the
> engine the thing backfires through the throttle body. Which leads me to
> believe that the timeing chain has slipped and its jumped time. I called
> a local shop to see if they would fix it, the asked if it was Over head
> cam and I said yes they said they wouldnt fix it. Is this car worth the
> time and money of fixing it?
>
>
>
 
G

·
Discussion Starter · #3 ·
we cant perform a code check, the battery has been out of the car since it
stopped running last march.

so is this a deffinate thing? Does this ALWAYS happen when the timing jumps?
So if what your saying is true than this car isnt worth an entire engine.


"Jim Warman" <[email protected]> wrote in message
news:[email protected]
> These engines have two timing chains and are what is known as
> "interference cycle".... meaning the valves and the pistons occupy the
> same space at different times. If timing has jumped, you are looking at
> some bent valves and, possibly, damaged pistons.
>
> YMMV..
>
> FWIW, I'd likely perform at least a compression test and code scan before
> I jumped to too many conclusions.
>
>
> "Adam" <[email protected]> wrote in message
> news:[email protected]
>> ok,
>> I have a 97 Mercury Cougar with a 4.6 v8 in it, when you crank the
>> engine the thing backfires through the throttle body. Which leads me to
>> believe that the timeing chain has slipped and its jumped time. I called
>> a local shop to see if they would fix it, the asked if it was Over head
>> cam and I said yes they said they wouldnt fix it. Is this car worth the
>> time and money of fixing it?
>>
>>
>>

>
>
 
G

·
Discussion Starter · #4 ·
Where is the car? I can take it off your hands.

CJB

"Adam" <[email protected]> wrote in message
news:[email protected]
> we cant perform a code check, the battery has been out of the car since it
> stopped running last march.
>
> so is this a deffinate thing? Does this ALWAYS happen when the timing
> jumps? So if what your saying is true than this car isnt worth an entire
> engine.
>
>
> "Jim Warman" <[email protected]> wrote in message
> news:[email protected]
>> These engines have two timing chains and are what is known as
>> "interference cycle".... meaning the valves and the pistons occupy the
>> same space at different times. If timing has jumped, you are looking at
>> some bent valves and, possibly, damaged pistons.
>>
>> YMMV..
>>
>> FWIW, I'd likely perform at least a compression test and code scan before
>> I jumped to too many conclusions.
>>
>>
>> "Adam" <[email protected]> wrote in message
>> news:[email protected]
>>> ok,
>>> I have a 97 Mercury Cougar with a 4.6 v8 in it, when you crank the
>>> engine the thing backfires through the throttle body. Which leads me to
>>> believe that the timeing chain has slipped and its jumped time. I
>>> called a local shop to see if they would fix it, the asked if it was
>>> Over head cam and I said yes they said they wouldnt fix it. Is this car
>>> worth the time and money of fixing it?
>>>
>>>
>>>

>>
>>

>
>
 
G

·
Discussion Starter · #5 ·
As it stands right now, you only THINK that the timing has jumped.. more
common would be a broken valve spring or a cam follower problem.


"Adam" <[email protected]> wrote in message
news:[email protected]
> we cant perform a code check, the battery has been out of the car since it
> stopped running last march.
>
> so is this a deffinate thing? Does this ALWAYS happen when the timing
> jumps? So if what your saying is true than this car isnt worth an entire
> engine.
>
>
> "Jim Warman" <[email protected]> wrote in message
> news:[email protected]
>> These engines have two timing chains and are what is known as
>> "interference cycle".... meaning the valves and the pistons occupy the
>> same space at different times. If timing has jumped, you are looking at
>> some bent valves and, possibly, damaged pistons.
>>
>> YMMV..
>>
>> FWIW, I'd likely perform at least a compression test and code scan before
>> I jumped to too many conclusions.
>>
>>
>> "Adam" <[email protected]> wrote in message
>> news:[email protected]
>>> ok,
>>> I have a 97 Mercury Cougar with a 4.6 v8 in it, when you crank the
>>> engine the thing backfires through the throttle body. Which leads me to
>>> believe that the timeing chain has slipped and its jumped time. I
>>> called a local shop to see if they would fix it, the asked if it was
>>> Over head cam and I said yes they said they wouldnt fix it. Is this car
>>> worth the time and money of fixing it?
>>>
>>>
>>>

>>
>>

>
>
 
G

·
Discussion Starter · #6 ·
I was told also the computer could be bad, what about that?

"Jim Warman" <[email protected]> wrote in message
news:[email protected]
> As it stands right now, you only THINK that the timing has jumped.. more
> common would be a broken valve spring or a cam follower problem.
>
>
> "Adam" <[email protected]> wrote in message
> news:[email protected]
>> we cant perform a code check, the battery has been out of the car since
>> it stopped running last march.
>>
>> so is this a deffinate thing? Does this ALWAYS happen when the timing
>> jumps? So if what your saying is true than this car isnt worth an entire
>> engine.
>>
>>
>> "Jim Warman" <[email protected]> wrote in message
>> news:[email protected]
>>> These engines have two timing chains and are what is known as
>>> "interference cycle".... meaning the valves and the pistons occupy the
>>> same space at different times. If timing has jumped, you are looking at
>>> some bent valves and, possibly, damaged pistons.
>>>
>>> YMMV..
>>>
>>> FWIW, I'd likely perform at least a compression test and code scan
>>> before I jumped to too many conclusions.
>>>
>>>
>>> "Adam" <[email protected]> wrote in message
>>> news:[email protected]
>>>> ok,
>>>> I have a 97 Mercury Cougar with a 4.6 v8 in it, when you crank the
>>>> engine the thing backfires through the throttle body. Which leads me
>>>> to believe that the timeing chain has slipped and its jumped time. I
>>>> called a local shop to see if they would fix it, the asked if it was
>>>> Over head cam and I said yes they said they wouldnt fix it. Is this
>>>> car worth the time and money of fixing it?
>>>>
>>>>
>>>>
>>>
>>>

>>
>>

>
>
 
G

·
Discussion Starter · #7 ·
Without performing some tests, it will only ever be a guess. Many have found
that guessing gets to be very, very expensive.
 
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