It's why it's knocking that really determines how long it will last, but it makes
no sense to drive any car with a knock as it will be causing more damage as
you drive it. If it is a rod knock(or main knock), what starts as bearing wear
eventually will become crankshaft wear. If you stop driving immediately, you
may be lucky enough to pull the pan and replace bearings only. If it has no oil
pressure, then most engines will self-destruct fairly quickly. The Alfa engines
actually have very robust bottom ends,and the 4 cyl. has had a nitrided crank
since it became a 2 liter. The V-6 has always been nitrided- its weakness has
always been the belt detensioner(as Alfa calls it) which works with oil pressure;
so since a knock usually is related to low oil pressure, you can see the problems running it with an oil pressure based tensioner and valves which will smack the
pistons. I did once run a BMW 325 that had actually seized while driving
because the owner cracked the oil pan and lost all of his oil, but once it cooled
down it actually started; so I ran it at almost full throttle(long story) for over a half
an hour until it made so many noises I thought it would blow up. When I tore
it down to rebuild it,I was astonished to find that there was no crank damage
whatsoever. It did have Slick 50 in it, so I guess that's an endorsement of its
effectiveness.
the505inme <the505inme@yahoo.ca> wrote: My dad bought a 79 504 Diesel wagon for $50 15 years ago. It was
badly rusted, was hard to start, and smoked alot. Mega miles. It made
a hell of a racket, some of which could be described as knocking,
hard to say being a diesel and half an exaust system.
He attempted to drive it to his shop, a 30 minute drive on the
freeway, and had a buddy follow him, just in case. But don't worry,
he said, it's a diesel, they last forever! I could drive this car to
Egypt!
On the on ramp he went, foot went to the floor. It didn't take long
for the rattle to become knocking then straight to KA-BAM! La engine
blew up, and buddy following got his windshield coated in dead
Peugeot motor oil. He turned on the wipers and smeared it all over
the windshield, and nearly rammed the disabled 504. Distance
traveled? A staggering 2 km. Then another 15 km to the nearest
wreckers, but on the end of a rope.
True story!
- In peugeot-L@yahoogroups.com, Otis Keith <orkeith@s...> wrote:
>
> I would say that it depends on what you expect to find at the end
of the trip? I too had an occasion to drive a vehicle with a "knock"
on several occasions. I consider any "knock" to be harmful and
adjust accordingly.
>
> I had an oil pump go out on my '76 Dodge D100 truck and had to
drive it across town. I tore it down for complete overhaul that
weekend and found that I hade scored only one rod bearing. I thought
myself lucky.
>
> The one that gave me fits was on a '70 Olds 455. I had just
installed a used engine into the car and when I fired it up it had
what sounded like a rod knock. Since I had no history on this used
motor, I pulled it out and installed a rebuilt one instead. Since I
then had transportation I decided to check the 455 for the knock.
What I found was that the oil pan had a slight dent near the front
and one of the rod bolts was just touching the pan, thus the "knock".
>
> On one of my Peugeots we had a broken piston skirt that was
causing a knock.
>
> So you can see that there are several thinks that can cause a
knocking sound and not all of them will destroy an engine in the
short run but all need to be corrected.
>
> Otis
> St. Louis, Mo.
> 86 505 Turbo Sw
> 86 505 sti
> 85 505 SW
> 81 505 TD
> 81 504 Diesel SW
>
> Gnarly 505stx <gnarly505stx@y...> wrote:
> LOL
> this is funny
>
> i accidentally started a melee in the Alfa 75 group the other day.
some of them want to EXcommunicate me from life, not just from the
alfa list.
>
> all i did was ask an innocent question. HOW FAR WOULD YOU GET AWAY
WITH DRIVING A CAR WITH A KNOCKING ENGINE?
>
> I had to get a car from where it was to somewhere about 25 miles
away.
>
> I think we can take it from the mortified responses that these
people are not accustomed to dealing with engines that are too
staunch!
>
> UNLIKE US! because I was remembering when I had a 505 V6 with a
knock. I was always too horrified to drive the car at all, ever,
anywhere. AND I WANTED TO DRIVE IT SOOOO BADLY! Even at least as a
field car or whatever. Alas, I never did get to enjoy that car at all
again. I sold it to a guy who junks cars for $200. BUT HERE'S THE
THING. He said he thought it was too funky just to take to the
crusher immediately...so he drove it! And he drove it and he drove it
around! AND HE POUNDED ON THE THING AS HARD AS HE COULD FOR DAYS ON
END...And then what? then he DROVE it to the crusher!
>
> UGG DARN LOL !
> okay, so the engine did have Mobil One 0w40 (or similar...dont
think Mobil 1 came in 0w50, 0w30 maybe, but it was something similar--
as free flowing at cold start as it could be, but thicker in
general)...never the less,
>
> in the alfa group, my question triggered story after story of guys
driving anywhere from half a mile to a few dozen feet with an oil
light that just came on or an engine noise that just started AND
PROMPTLY TURNED THEIR v-6 ALFA ENGINES INTO USELESS EFETTE PIECES OF
(dis-similar)METALS... and triggered vilification after vilification
of me for being so stupid to even ask such a question!
>
> WELL, the car in question was a VW, with 1.8 liter 4 cyl with
235,000 miles. It made it all 25 miles and more just fine, no
problem!... well, it's only a LITTLE noisier now than it was, but it
never stalled or anything...
>
> SO my question of how far you can get away with driving a knocking
engine depends greatly on the people you ask and how accustommed they
are to enjoying stout ROBUST engine designs! as i am from Volvo 4
cylinders and from Peugeots. and the V6 alfa is probably one of the
least robust engines around euro car circles. (in fairness, if i had
asked the Alfa Spider group the same thing, the answer probably would
not have been so bad bc those people are used to a tough little
engine in that Alfa 4 cylinder block!)...
>
> SO I ASK IT HERE!
> Jay
>
>
>
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Received on Sun Dec 11 08:50:30 2005
