strong engine shaking after a long trip

[shopper]

hello...
last weekend i drove from hamburg to wiesbaden 580km
the end of the ride were some mountains to climb

then in the city of wiesbaden the engine is shaking very strong at the first gear
not good...
but after one or two hours and the engine was cold.....
nothing 
no shaking.. all ok....

what can it be..?

[miro-1980]

Hi,


You say "engine is shaking very strong at the first gear"

What  do you men in first gear ? Howe about in neutral at low medium high RPM?

Are you sure it was the engine not other art of the car ( gearbox, shaft. axis)?   

Cold OK / hot bad engine shaking seems to indicate fuel/air/plugs/ timing issue.

Was there any loss pf power ? 
Did it start well when hot?
Was there any problem switching the engine off?  
Was there any noise (small jingling bells, strong low frequency bumping)?  
What was the coolant temp when shaking ?
Was the problem only in high altitude ?  
What engine is this?
What plugs are you using?
Is it properly tuned?
Are carburetors properly adjusted/cleaned ?
Is the air fuel mixture OK ?
Is it properly timed ?
What fuel are you using?

I would have the car tuned :

change air filter
change fuel filter
change plugs (depending on the engine you have )
time the engine properly
clean the carburetor, blow compressed air through jets  

When at it check oil and coolant ( add if required )  

Try it again ...

Hard to diagnose an engine at  distance ... ,  but we will try

Miro      



 

[shopper]

Are you sure it was the engine not other art of the car ( gearbox, shaft. axis)?  engine,gearbox

Cold OK / hot bad engine shaking seems to indicate fuel/air/plugs/ timing issue.

Was there any loss pf power ? no
Did it start well when hot?   absolut at first turn
Was there any problem switching the engine off?  no
Was there any noise (small jingling bells, strong low frequency bumping)? no 
What was the coolant temp when shaking ? noallways by 90?
Was the problem only in high altitude ?  no
What engine is this? 1600 standart
What plugs are you using?
Is it properly tuned? no
What fuel are you using? super 95 "e5"/"e10

the komplete engine and gearbox,kardan.. and only when i go on to ride... after a long turn
when the car is on the ride... no shaking... ... nothing
when i drive to work... 13km ... nothing

[miro-1980]

OK, let us summarize :

Engine: 1600 Fiat DOHC standard standard
Fuel: super 95 "e5"/"e10
Not recently tuned

Problem:  the drive train shakes when engine is hot

Other effects :
Power loss : no
Problem starting stopping engine : none whatsoever
Accompanying noise : none whatsoever  
Coolant temp : 90 deg all the time
Problem on high altitude only ?  no

Well this is interesting ... are you sure the problem is heat related?

Initially the problem looked  related to the combustion process , but now it looks like other elements may be involved. Machanical?? (but no noise, and how come only at when engine is hot).

Few more questions:
How recently was the engine rebuilt?
Does it take any oil ?

Any delay in acceleration when effects in place ?
How do you know the problem is associated with hot engine of the coolant temperature is always 90 Deg?
At what RPM the problem occurs ( idle, 1000, 2000 ,3000, 4000 , etc )
is the problem visible when the car is not driving, just idling at low idle RPM ?

is the clutch operating smoothly?

Is the gerabox shifting smothly ?

Does the shaking occur at ant given gear?

Dear shopper , if the shaking is severe you should not operate the car until it is diagnosed.

Please inspect the car from underneath for lose connections of drive shaft : gearbox to shaft. shrt to long shaft , shaft support, shaft to diff.

It is very important to know if the car engine/gear box also shakes  when engine is idling but the car is not going. If yes the problem is likely to be engine related , if not the problem is most likely gearbox, clutch, fly wheel, handy   dling and not wheems are not turning
     

[shopper]

Problem:  the drive train shakes when engine is hot

only when i start
when the tires are on the run... nothing

my thinking...
when i drive a long turn... without any pause
can it be that the heat from the engine is going to the engine suspension
and they going soft and stretch ..?

the engine for herself is not shaking.... the whole car...

the problem to write in engish is very tricky   

[miro-1980]

Shoppe .

Please pu it in German, I will ask Enzo t look at it. please do not drive the car.

It may be unsafe to operate.

If the whole car shakes - could be related to broken chassis, loose suspension, wheels totally off alignment ,wheels not properly screwed to the hubs, etc.These may cause the car to go totally out of  of control without any warning.

The car needs to be inspected by a qualified mechanic before you can drive it. you could hurt yourself or someone else on a road.

Miro   

[shopper]

 the problem only occurs when I start driving
when the car goes, I feel nothing

and the first time was after 580km without stop... 5hours driving

its not the engine self....

s the problem visible when the car is not driving, just idling at low idle RPM ? no

is the clutch operating smoothly? yes[/color

Is the gerabox shifting smothly ?  yes[/color

[mirafioriman]

If it only happens when you set off I'm guessing clutch judder. When the car is driven long distances the oil gets thin, leaks out onto the clutch plate and causes judder.

[Thotos]

If it only happens when you set off I'm guessing clutch judder. When the car is driven long distances the oil gets thin, leaks out onto the clutch plate and causes judder.

I agree; certainly sounds like clutch judder. Oil contamination is one of several reasons that cause clutch judder although since it's only when hot and after a log journey, oil contamination is the most likely reason in this case. See http://wiki.answers.com/Q/What_makes_a_clutch_judder

[david]

I had this exact same fault on a sport and when I took clutch out there were small cracks in the clutch cover on the face where it meets the plate and that was what it was.