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Discussion in 'Boxers/TR/M' started by tamburini44, Jun 6, 2019.
Can you tell me more about this?
you never do only 1 head at an engine what has more than 1 heads. so normaly all, otherwise as I see it, it will not be right work
sure you can do it the cheap way but then this shop doing this job may get problem when later something else will go worng.
sorry, too lazy just now to read all, but how many miles the motor has?
and when you are so far then it would be good to make just a complete engine overwhaul, may be you need only bearings same std size an dalso piston rings std? this little signs at the pistons you may inspect closer, bu tI think no problem no use them again.
a good machine shop will fix the bearing in the head and also the half bearing on the top, also can grind the camshaft that you not need a new one.
just now I don´t know the valve sizes, but you may compare some valves from japanese motorcycles or also cars with high rpm. much cheaper and I think also better, but until now I have not the time to look for equal valves. it makes no sense to buy F valves for inlet 170,- each.
if you like 24 used inlet valves ( 120476 ) and also 24 used outlet valves ( 120477 ) make me an offer. I have here because I like to put in larger valves and so I not need those anymore
120476 are inlet valves for testarossa up to 1990, the 512TR and the M has 139855. does someone knows the difference? other material or other dimensions?
I'd be fine with this, so long as the dealer oversees the entire operation.
Otherwise there's the risk of one party blaming the other if there's an issue later.
I'll let you know.
I'll take about a week to think about the best way forward.
It's not just about the technical aspects, but also some EU legal constraints which are a total nuisance.
Why not just one head?
A smooth running engine has each cylinder producing similar compression/power. If six have fresh, full compression/power and the other six are tired... you will never have a smooth running engine.
My engine will balance a nickel on the intake manifold. It runs well... but is not ‘special’. The cylinders are reasonably well balanced.
What about the fresh top end vs. the tired bottom end?
For a balanced, optimum result, one would have to rebuild the entire engine.
The power made within the cylinder is unaffected by tired bearings.
If only six pistons are changed out with fresh rings/hone, then yes... an entire rebuild would be best. My statement is based on not changing out pistons/rings.
1. Doing a full rebuild.
Issues: because of EU laws I'd have to mothball the engine for the duration of the legal process.
2. Doing the minimum - rebuilding the RH top end.
Issues: doing the top end only, even if it's both sides, would leave me with an engine bearing the marks of catastrophic failure,
and possible hidden damage, and frankly diminished value. Considering this wasn't an act of God, that's a compromise.
If anyone has a lead on a good european TR engine please let me know.
That would allow me to go for option 1) without immobilizing the car for the duration of the legal process with these *******.
3.. Go electric during the legal process, assuming it's reversible and comparably priced.
where are you located in europe?
your profile says nothing, so would be great if you could fill out
BTW, is there some sort of sn# or unique identifier, or at least a manufacturing date on the cylinder heads?
You have the same process in Germany with the gutachters etc, so you know what I mean.
I know what you mean, that is why I asked you where you are located because may be I can help you about this all?
normaly the court order the gutachter and as soon as he finished you get the engine back. but unfortunately you already dismanteled the engine, found all what is wrong and the gutachter not knows for example if this engine has been in your car or not.
when you order the gutachter and it comes to court then this gutachten ( opinion ? ) is not neutral because it was ordered by you and not by the court.
when I baught my competition I had a diff problem after short time, inspected the gearboxoil ( a lot of debris/parts inside ) and then just started an evidence assurance procedure ( beweissicherungsverfahren ). but this all took about 1 year and then I started to repair
have good luck with all the problems you have now
Does anyone have experience with the Superformance valves or pistons?
Our neighbor is German so he told me about the gutachters. That's scary about 'getting the engine back'. They literally take your engine?
The reason it took us so long to take the engine apart is because I had to follow the legal procedure.
The shop/seller was summoned to two inspections by our insurance. They didn't come.
The F dealer did all the dismantling etc in the presence of the inspector.
Now it goes to court and there's another inspection, ordered by the court. Kafkaesque system.
I'll work with the local lawyers to ensure compliance, but the surest way is to procure another engine.
I hired lawyers elsewhere also, in case there's a way to expedite this nightmare.
Camshaft seized for the same reason - https://www.ferrarichat.com/forum/threads/seized-exhaust-cam.225944/
Background on this company is the proverbial can of worms