And another goes POP!...well cough, rattle.....

And another goes POP!...well cough, rattle.....

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yzf1070

Original Poster:

814 posts

233 months

Friday 1st July 2005
quotequote all
Well folks it was as JSG has said about most S6 engines.....Only a case of when, not IF.

Having spoken with TVR Craft and discovered more, I now know what tell tall signs were there before the obligatory top end clattering started. Its a case of if you knew what to listen and look out for. Time for failure I reckon is mainly down to how hard you push the engine and how often.

I do not wish to create scare mongering within these pages.

If anyone is interested in knowing more, especially if you regularly explore the engines power range... email me.

Its off to TVR Craft for my Tusc.

G

yzf1070

Original Poster:

814 posts

233 months

Saturday 2nd July 2005
quotequote all
Guys

There is to be a presentation arranged and paid for by TVR Craft Al Melling will be the spoke person. Venue to be some where around Salisbury proposed as 14th August (not yet fully comfirmed they are worried about attendances, will there be too many people or will there be only a few?!?). I understand that Al Melling is going to discuss the AJP V8 and the history of the Speed 6. I do not know exactly what the details are that will be discussed, but there will be a questions and answer session after the presentation.

Upon reflection the tell tale signs for me were:

Sudden erratic and unwilling to tick over on cold start up. This seemed to get worse.
If I did not catch it quite right on cold start up, it would cough and splutter(a sort of pop in the inlet manifold which in hind sight points to a bent inlet valve which is sticking slightly open)
Once warmed up the car would restart easy and tick over fine.
Dropping a gear and full open throttle it would sometimes hessitate and then clear as if an HT lead was momentarily breaking down.

The car does not use any oil at all. Which suggests that the bent valve has happened fairly recently in so much as the valve guides have not yet worn sufficiently enough for the seals to pass oil.

Having spoken with TVR Craft about the mods they carry out, I have absolutely no faith in any TVR factory affiliated repair. Such a repair is going to be a rebuild only using exactly the same configuration, so I am not going to waste my money or time in that route. The fixes that TVR Craft descrivbed to me make complete sense. Moreover, as they explained the fixes to me it all fell into place with regards to the symptoms of my engine. The fixes TVR Craft described to me, replaces everything to do with the valve train, whilst retaining the standard camshafts. I will not go into anymore detail than that. If anyone wants more info on the fixes, I suggest you call TVR craft and reserve a place at the forth coming presentation. Incidentally they have 4 Speed 6's in at the moment waiting on new parts, They are about to receive a 5th on monday....mine.

I believe that if you do not regularly push the engine hard your S6 may well last years and 1000's of miles, but if like me you enjoy the potentials of this car, your motor is on borrowed time.....that is MY opinion of the matter.

I would like to add that I ALWAYS warm the engine thouroghly before reving it hard. Before it is warmed up it is short shifted and does not exceed 2500 to 30 deg C and 3500 up to fully warmed OIL temp (on mine around 60-65 deg C depending on climate and traffic.

I hope this helps some of you.

G

yzf1070

Original Poster:

814 posts

233 months

Sunday 3rd July 2005
quotequote all
Daft Lad, Nelly,

I am simply offering my opinion and my S6 experiences and I did try to imply that not all others are going to experience the same, read between the lines.

My S6 has gone pop at just over 6K miles from new. I had read the other posts, I knew exactly what I was getting into when I bought the car and I have the finances to get it fixed and I am niether worried nore concerned. I wish to keep the car once fixed as I LOVE it.

I have a fair ammount of experience with tuning high performance motorcycle engines to know what I have posted is a fairly accurate account of the sypmtoms experienced. With out a strip down and inspection then I will speculate no further....I said it was and is my opinion.

I received a whole heap of emails asking for more info, so I decided to repost.(By the way your wrong, an engine will tick over fine with a bent valve, it depends on where and how badly bent...seen it before on a Turbo Hyabusa and a 3000GT TT I owned).


The info is there to use or disregard....that is yours and everyone elses perogative. Take it or leave it.

By the way are you intending to go to the TVR Craft presentation? I would like to meet and discuss the subject further, hopefully by then I will know more about mine.

Regards to all

G

yzf1070

Original Poster:

814 posts

233 months

Tuesday 5th July 2005
quotequote all
I offer this up for thought. AGAIN...this is MY outlook on the issue.

The reason why I have gone the TVR Craft route is simply that my 2003 S has failed...a supposed factory fixed era engine.... and it is out of warranty. I have read many threads on Dealer/Factory rebuilt engines also failing after having had the proposed latest factory parts......common sense suggests there has to be a rabbit away there somewhere....!

My discipline is that of an Instrumentation Controls Engineer and I understand a lot about electronics and mechanics. I have played around with a fair number of engines seeking higher power gains so know enough about the involved technologies. I spoke with the TVR Craft crew and liked what I heard. So I went to see and liked what I saw. Sure the guys before me and I are the guinea pigs. I am sure they like I, just want a fix that works. I love my car and want to keep it...in WORKING order. To me it’s obvious the factory is continually sweeping this issue under the carpet whilst remaining tight lipped, to me they have an obligation to address the matter with the customers even on an individual basis. I am not going to waste my sterling with them, especially having seen the factory standard items and the available alternative components. I can see a like for like fix is prone to fail again, just looking at the difference in parts and having the design functionality explained to me.

I dropped my car off at TVR Craft yesterday and spent a good few hours down there with them. My car was run up on their rolling road and produced some strange noises; it seemed to be pinking something terrible at high load and the clatter was intermittent. Much less frequent than before. It is still not easy to start from cold though. They will not know for sure what is wrong until they get it apart.

They also showed me the difference between the factory spec valves and their replacement valves...just about every aspect of the valve is different, stem diameter is much greater, flow characteristics are different and the seat width is greater. They will replace all of the valve train except the cam shafts with alternative high spec components. They also perform mods to the pistons and improve oil distribution around the head. There are quite a lot of other issues combined that we discussed. For curious/interested owners who wish to know more, they are happy to receive calls and discuss.

I am optimistic and patient. . For those of you that have little faith in the TVR Craft proposed solution, may I suggest that you watch this space. But until otherwise proven, I suggest you look upon this as a positive way forward for a possible alternative to the seemingly continued failings of the factory. I will be the first to share knowledge if the fix does not work on my car. Very soon the fix will be on the road in the cars owned by the guys before me.

Obviously I wish them the very best.

Regards to all
G

yzf1070

Original Poster:

814 posts

233 months

Tuesday 5th July 2005
quotequote all
Veg,

There's one of those in TVR Craft at the moment with a broken crank....snapped in 3 places and destroyed the clutch. The casting across the broken sections is nothing short of crap...looks like something you would expect to have come from China.

yzf1070

Original Poster:

814 posts

233 months

Tuesday 5th July 2005
quotequote all
Neil Thanks for the well wishes.

I fear the nights may have drawn in by the time I get it back.....Seriously, I did not want to press them on a date as they have only just received the new valves for the first motor they got in. They are expecting a big batch delivery very soon...!

I am expecting 2 months, 3 on the outside, but they have promised to keep me informed all along the way. (If not I will pester them to the point of pi55in em off, I did say that I would only pester if they failed to inform). 2-3 months seems a long time I know, but I will soon be off to Baku again and the time will seem to pass more quickly.
I would hope that as they get a more regular supplier production run they will hold packages on the shelf for a quick in and out fix. They really are very positive and are expecting this to take off. so much so that if it does, they are looking to expand premises by taking the unit next door to handle the volume anticipated. Personally I would expect prices to come down as a result as well. 4 to 5K is in my mind an expenssive package once you have a regular supply and service running. I can understand it on initial start up and development.

Regards

G




yzf1070

Original Poster:

814 posts

233 months

Wednesday 6th July 2005
quotequote all
apache said:

twobulldogs! said:
Is the general consensus that it is worthwhile having TVR Power re-build/repair the engine or not? Confused of Plymouth



I'd take it to TVR Craft, after all their man designed the thing


EXACTLY...and when you see the difference in the original and the standard TVR supply components you will realise why it has to be a better solution. For anyone having to pay for a fix themselves, going for a like for like rebuild makes absolutely no sense and there is no info forth coming to support it is NOT a like for like repair. More so the opposite, especially when its been reported on here that they have gone pop again. If the factory would come out and make it public that there are revised components available then I would perhaps reconsider my slender options. But the factory have said didley squat about the whole affair.....which in my view is incredibly poor customer relations verging on the surreal.

I was sceptical of the grounds surrounding reported failures until I experienced it for myself, knowing how well I have treat the car. And then the seeing...well thats pointed me and my S6 in one direction, a designer approved solution....This to me is sound pracical judgement, given the options currently available.

Regards

G