Engine flush?

[Ted G.]

I've got a '96 Mazda 626 with a V6 engine. When these engines are new, they
are silky smooth, almost silent. After 170,000 kms though, mine sounds like
a truck ... lots of tappety noises and general truck-like idle sounds.

I would love to try to get it quiet again. Lots of Googling has suggested
that some folk overseas had success with a machine engine flush. Is this a
gimmick or does it really work? Is there anyone in Melbourne who does this
service?

[Michael C]

"Ted G." <nospam@example.com> wrote in message
news:4255ac07$0$29865$afc38c87@news.optusnet.com.a u...
> I've got a '96 Mazda 626 with a V6 engine. When these engines are new,
> they are silky smooth, almost silent. After 170,000 kms though, mine
> sounds like a truck ... lots of tappety noises and general truck-like idle
> sounds.
>
> I would love to try to get it quiet again. Lots of Googling has suggested
> that some folk overseas had success with a machine engine flush. Is this a
> gimmick or does it really work? Is there anyone in Melbourne who does this
> service?

Stick a banana in the rocker cover, that will quieten it down.

Michael

[John_H]

Ted G. wrote:

>I've got a '96 Mazda 626 with a V6 engine. When these engines are new, they
>are silky smooth, almost silent. After 170,000 kms though, mine sounds like
>a truck ... lots of tappety noises and general truck-like idle sounds.

Any truck that sounds like that has probably done a million
kilometeres and is well on its way to being stuffed. :)

>
>I would love to try to get it quiet again. Lots of Googling has suggested
>that some folk overseas had success with a machine engine flush. Is this a
>gimmick or does it really work?

Not likely. If its oil change periods have been so seriously ignored
it needs flushing then it's probably rooted -- in which case flushing
will probably be terminal. If it's had the oil changed regularly it
shouldn't need flushing.

If the oil filler cap is in one of the rocker covers removing it and
wiping your finger inside the opening will probably give you an idea
as to whether it's suffering from suds clog (a terrible affliction
that washing machines apparently succumb to).

Adjusting the valve clearances might be a good start. You might also
enquire as to how the cams are driven.

--
John H

[Jason James]

"Ted G." <nospam@example.com> wrote in message
news:4255ac07$0$29865$afc38c87@news.optusnet.com.a u...
> I've got a '96 Mazda 626 with a V6 engine. When these engines are new,
they
> are silky smooth, almost silent. After 170,000 kms though, mine sounds
like
> a truck ... lots of tappety noises and general truck-like idle sounds.

high mileage engines can get quite noisy,..some more than others. If its got
shim adjusted valve clearance it may need reshimming. Other noises like
piston slap and bearing noise cannot be quietened without a major o/haul..



> I would love to try to get it quiet again. Lots of Googling has suggested
> that some folk overseas had success with a machine engine flush. Is this a
> gimmick or does it really work? Is there anyone in Melbourne who does this
> service?

Engine 'flushing' is not a good idea. If you can imagine a solvent loosening
internal sludge deposits then it falls into the sump where it either clogs
the oil-pump pickup screen or gets pumped into the oil-filter where it clogs
then bypasses the filter via a valve,.then proceeds into the engine
oil-galleries,....not nice.

Jason

[zonie]

Engine flush is a bad idea. I have heard of some Mazdas here with the same
problem. Mazda claims it was some faulty lifters and would have to be
replaced. Scott

[Ted G.]

Thanks for the answers so far. Sounds like engine flush is somewhat
controversial.



"Ted G." <nospam@example.com> wrote in message
news:4255ac07$0$29865$afc38c87@news.optusnet.com.a u...
> I've got a '96 Mazda 626 with a V6 engine. When these engines are new,
> they are silky smooth, almost silent. After 170,000 kms though, mine
> sounds like a truck ... lots of tappety noises and general truck-like idle
> sounds.
>
> I would love to try to get it quiet again. Lots of Googling has suggested
> that some folk overseas had success with a machine engine flush. Is this a
> gimmick or does it really work? Is there anyone in Melbourne who does this
> service?

[atec]

Ted G. wrote:
> Thanks for the answers so far. Sounds like engine flush is somewhat
> controversial.
You can be lucky but normally the flush shakes the crap loose and it
gets into all the places you don't want just like sand and women's bits...
>
>
>
> "Ted G." <nospam@example.com> wrote in message
> news:4255ac07$0$29865$afc38c87@news.optusnet.com.a u...
>
>>I've got a '96 Mazda 626 with a V6 engine. When these engines are new,
>>they are silky smooth, almost silent. After 170,000 kms though, mine
>>sounds like a truck ... lots of tappety noises and general truck-like idle
>>sounds.
>>
>>I would love to try to get it quiet again. Lots of Googling has suggested
>>that some folk overseas had success with a machine engine flush. Is this a
>>gimmick or does it really work? Is there anyone in Melbourne who does this
>>service?
>
>
>

[kevcat]

"Ted G." wrote:
>
> I've got a '96 Mazda 626 with a V6 engine. When these engines are new, they
> are silky smooth, almost silent. After 170,000 kms though, mine sounds like
> a truck ... lots of tappety noises and general truck-like idle sounds.
>
> I would love to try to get it quiet again. Lots of Googling has suggested
> that some folk overseas had success with a machine engine flush. Is this a
> gimmick or does it really work? Is there anyone in Melbourne who does this
> service?

most of them are just diesel or kero based


An Engine flush will not fix worn mechanical parts
have the valves checked and adjusted

the only time I'd use an oil flush is just before I pulled the engine
down for a rebuild, makes parts cleaning a bit easier

Kev