need for engine rebuild how do you know ?
Discussion
There are many contributions on here, where and what and why are the alternatives to have a top-end and/or bottom end engine rebuild.
What are the certain indicators / symptoms for the need of a rebuild, while the engine is still doing its job? How would you - as a normal Speed Six driver - notice, before the engine goes bang and what exactly does this mean / what exactly goes bang there and how do you see, hear, smell or feel it?
What are the certain indicators / symptoms for the need of a rebuild, while the engine is still doing its job? How would you - as a normal Speed Six driver - notice, before the engine goes bang and what exactly does this mean / what exactly goes bang there and how do you see, hear, smell or feel it?
My S6 is up to almost 40,000 miles now without any problems. I had decided after a rolling road test that I wanted to up the HP, so I decided on a rebuild and upgrade to Red Rose spec.
In spite of no problems with the car in the three years I've owned it, the engine was eating the finger followers. The damage was so bad that the bottom end has got to be replaced.
I wouldn't have known about, it unless the engine had been taken apart or it went BOOM!
In spite of no problems with the car in the three years I've owned it, the engine was eating the finger followers. The damage was so bad that the bottom end has got to be replaced.
I wouldn't have known about, it unless the engine had been taken apart or it went BOOM!
First sign's are one or both of the tailpipe's puffin blue or black (especially when cold) excessive oil consumption, ie more than 1 litre per 1k road miles, the engine can still sound and run fine at this point, if in doubt have the cam cover off and check how much adjustment is left on the shim's, not all of them go out in a blaze of glory! 
Far Eastender said:
My S6 is up to almost 40,000 miles now without any problems. I had decided after a rolling road test that I wanted to up the HP, so I decided on a rebuild and upgrade to Red Rose spec.
In spite of no problems with the car in the three years I've owned it, the engine was eating the finger followers. The damage was so bad that the bottom end has got to be replaced.
I wouldn't have known about, it unless the engine had been taken apart or it went BOOM!
How much power are you hoping to gain? Mines in for rebuild at moment, just checking out options!In spite of no problems with the car in the three years I've owned it, the engine was eating the finger followers. The damage was so bad that the bottom end has got to be replaced.
I wouldn't have known about, it unless the engine had been taken apart or it went BOOM!
for info for the OP - 3 weeks into ownership and i have done 800 miles and used 3.5 litres of oil - i kinda guessed from that i had some serious problems! It had a top end rebuild the year previous....i guess it just wasnt done properly!
Robertjp said:
for info for the OP - 3 weeks into ownership and i have done 800 miles and used 3.5 litres of oil - i kinda guessed from that i had some serious problems! It had a top end rebuild the year previous....i guess it just wasnt done properly!
3.5 litres in 800 miles.. for contrast I haven`t used any oil in about 3000 miles! I would get someone to check this out asap.
J
(even though I was at a constant speed of 75mph)Typical failure modes are:
Loud tapping - top end blown and catastrophic failure imminent through debris jamming the oil pump(s).
Noticable over normal whistling/whirring - half time bearing on the way out and catastrophic failure imminent due to bearing collapse leading to timing chain failure.
High oil consumption - most likely worn valve guides (sometimes worn piston rings but less likely). Will get worse and worse until it eventually drops a valve.
BANG - Usually a spun/siezed big end bearing.
Loud tapping - top end blown and catastrophic failure imminent through debris jamming the oil pump(s).
Noticable over normal whistling/whirring - half time bearing on the way out and catastrophic failure imminent due to bearing collapse leading to timing chain failure.
High oil consumption - most likely worn valve guides (sometimes worn piston rings but less likely). Will get worse and worse until it eventually drops a valve.
BANG - Usually a spun/siezed big end bearing.
Edited by dvs_dave on Tuesday 23 June 16:29
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