Red Bull (5541)
- Thread starter Oversize
- Start date
If they are genuine period correct AMGs then that might work, but if they are more modern, I think you get more for Mercedes when they are stock and unmodified.
- Thread Starter
- #103
Yes I tend to agree. It seems even period correct AMG wheels aren't to everyone's taste and fitting them can limit the market somewhat. I thought about some 16" Aeros, however they are post-merger and therefore NQR. So I'll be fitting the nice set of Bundts that are currently fitted to Moby.
- Thread Starter
- #105
I’m about to purchase a tap & die set to chase n clean all threads. I’m wondering if all bolts should be replated & not just cleaned prior to reassembly? I’m not keen on them re-corroding, seizing & snapping again in the future…
Patrick_R
Grand Master
Can you buy new bolts?
ProfessorExperimental
Aristocrat
I've no experience of this exact job but in a situation where your (m100, right?) heads and manifold are actually quite valuable I'd be strongly favouring:
A) avoiding any chance of a shanked bolt corroding and damaging the hole in the manifold, especially cracking it or pitting the sealing surface: get new bolts.
B) minimising the wear on those threads in the heads to maximise the heads' lives. Without necessarily going to the extreme of fitting hardened thread inserts (e.g. Time Sert is a US brand I've heard of and very popular in the bmw crowd over there), and given that studs aren't an option - I assume, the manifold holes aren't oval are they? : consider brass bolts or aluminium. Be sure to look up electrolytic compatibility before going brass but my point is there's no boost to worry about so the fastners needn't be stronger than gasket torque, so get softer ones than the female thread.
A) avoiding any chance of a shanked bolt corroding and damaging the hole in the manifold, especially cracking it or pitting the sealing surface: get new bolts.
B) minimising the wear on those threads in the heads to maximise the heads' lives. Without necessarily going to the extreme of fitting hardened thread inserts (e.g. Time Sert is a US brand I've heard of and very popular in the bmw crowd over there), and given that studs aren't an option - I assume, the manifold holes aren't oval are they? : consider brass bolts or aluminium. Be sure to look up electrolytic compatibility before going brass but my point is there's no boost to worry about so the fastners needn't be stronger than gasket torque, so get softer ones than the female thread.
ProfessorExperimental
Aristocrat
Time Sert Supplier Australia & New Zealand
Time Sert Supplier Australia & New Zealand. Shipping to Adelaide South Australia, Brisbane Queensland, Melbourne Victoria, Northern Territory, Perth WA, Sydney NSW, Tasmania direct shipping from comprehensive stock.
timesert.com.au
No personal experience but advantage vs helicoil is supposedly the solid structure of the timesert vs the spiral of the helicoil. In the situation you mention I wouldn't be keen on a coil inside a coil...
The bmw reputation I mentioned is tied to turbocharging the m54 series naturally aspirated sixes, where pulling the head stud threads out of the block is a known risk above 8psi. Time serts seem to hold up against 14psi and up, and there are serious lads playing in the 7-800hp zone from 3 litres displacement... (probably e85 though)
Patrick_R
Grand Master
Big job.
Hi Mark, difficult to say if new bolts (e.g. head bolts) are actually available from Mercedes. I would imagine, however, if they are they are likely to cost an arm and a leg. I have carried out two Valve Grind and De-coke jobs now just on at least ten years ago, and I can report that, to all intents and purposes, I have had no need to purchase replacement bolts. Whilst one of the cars is no longer in my possession, Gleaming Beauty the subject of one of the jobs, is still in my possession. Up to now, and as I said at least ten years (with plenty of pictorial evidence on TK published at the time), I have not had a single drop of oil or water as a result of the particular job.
I still have many head bolts for both the 6.3 and 6.9 M100 engines, but knowing which are which I am not able to differentiate. However, they are spares I have on hand. BTW, I see that you still have this car. I had been under the impression that you had sold it, but maybe I am missing something.......Regards Styria
- Thread Starter
- #113
This definitely looks more promising that a helicoil repair esp their ‘big-sert’ option..
Time Sert Supplier Australia & New Zealand
Time Sert Supplier Australia & New Zealand. Shipping to Adelaide South Australia, Brisbane Queensland, Melbourne Victoria, Northern Territory, Perth WA, Sydney NSW, Tasmania direct shipping from comprehensive stock.
timesert.com.au
- Thread Starter
- #114
Threads were eventually repaired by The Thread Dr who was good value for money when compared with the cost of the Bigsert kit ($600ish delivered)!
EGR pipe has been removed, cut down & capped. Now I just have to clean up the fasteners, order a few more items & reassemble…
EGR pipe has been removed, cut down & capped. Now I just have to clean up the fasteners, order a few more items & reassemble…
- Thread Starter
- #115
Well after 13 years she’s finally running again!! Fought me almost all the way! Got lucky that the fuel system wasn’t completely gummed up! The fuel head was clearly affected so I carefully managed the prestart process. Took her for a short drive with systems working well apart from cooling fans & suspension cells. More diagnosis on the fans before I leave it to the new owner to fix the remaining issues.
Have you actually sold it?
I wouldn’t put a 6.9 badge on the air cleaner lol!! 
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