Gutted, just been told the inevitable is on its way!
Discussion
Had a slight judder between 60 & 65 whilst cruising, nothing serious, just a slight hesitation that felt like a missfire.
Spoke with Nick at Fernies and much to his credit, he traced the cars history back to Dom at power, whom I ended up speaking with.
Worse case scenario I thought, "new set of throttle bodies".
Turns out that the valve guides have a bit of wear and only a top end rebuild will cure it!
As a top end will set me back about £3k and a full rebuild will be £5K I may as well go for the full job and get the 3 yr warranty.
Cant quite bring myself to get it done yet, but Dom has offerred to have the car on his dyno, tune the blip out so at least it should be good to carry on for the summer.
Was mentally prepared for having a build at some point of ownership, just not quite this soon into it!
On a side note, very impressed with the help from Nick and Dom and amazed at the cooperation between the two, never seen anything like it in the dealership world before.
Kudos to both Fernies and Power!
Spoke with Nick at Fernies and much to his credit, he traced the cars history back to Dom at power, whom I ended up speaking with.
Worse case scenario I thought, "new set of throttle bodies".
Turns out that the valve guides have a bit of wear and only a top end rebuild will cure it!
As a top end will set me back about £3k and a full rebuild will be £5K I may as well go for the full job and get the 3 yr warranty.
Cant quite bring myself to get it done yet, but Dom has offerred to have the car on his dyno, tune the blip out so at least it should be good to carry on for the summer.
Was mentally prepared for having a build at some point of ownership, just not quite this soon into it!
On a side note, very impressed with the help from Nick and Dom and amazed at the cooperation between the two, never seen anything like it in the dealership world before.
Kudos to both Fernies and Power!
im struggling with the apparent cause of this juddering?? please tell me how the juddering and valve guides are linked? genuine question...doesnt sound right!
A new set of throttle bodies is around £500 fitted at str8 six (i had a 'judder' that was revs related but not speed??). A shot valve guide will cause high oil consumption, and i guess a misfire is possible if it affecting compression? first time i have seen it...just surprised...
A new set of throttle bodies is around £500 fitted at str8 six (i had a 'judder' that was revs related but not speed??). A shot valve guide will cause high oil consumption, and i guess a misfire is possible if it affecting compression? first time i have seen it...just surprised...
Edited by Robertjp on Saturday 21st January 21:03
Sorry folks, should have been clearer on this.
The "judder" is when cruising between 60 to 65ish and feels like there is a loss of power for literally half a second, if that.
The reason that Dom has definitely said its valve guide wear is the chap I bought it from approached him to purchase a warranty. On inspection, he found the wear so wasn't willing to offer one.
So be all and end all, he knows what the problem is, I will go up on the 6th Feb and get it on his rolling road just to see how much of an effect its having, then I'll sit and have a word with Dom and take it from there.
The "judder" is when cruising between 60 to 65ish and feels like there is a loss of power for literally half a second, if that.
The reason that Dom has definitely said its valve guide wear is the chap I bought it from approached him to purchase a warranty. On inspection, he found the wear so wasn't willing to offer one.
So be all and end all, he knows what the problem is, I will go up on the 6th Feb and get it on his rolling road just to see how much of an effect its having, then I'll sit and have a word with Dom and take it from there.
Mines on the way out too.Let's see if we can get a discount! If I was you I'd expect a figure quite a bit more than 5k.That's if nothing else needs attention or replacing.It seems its very hard to tie em down with a figure which makes it a b
h to save up for.And don't forget, as well as the'this needs doing as well ' phone call you'll have the 'while the engines out you might as well do....'
I'm dreading mine.The bill will just keep going up & up coz I know I'll want hoses replaced,new cam cover,New heat shielding,manifolds coated etc.I'm prob looking at May for mine.
Keep us posted.
Davey.
h to save up for.And don't forget, as well as the'this needs doing as well ' phone call you'll have the 'while the engines out you might as well do....'I'm dreading mine.The bill will just keep going up & up coz I know I'll want hoses replaced,new cam cover,New heat shielding,manifolds coated etc.I'm prob looking at May for mine.
Keep us posted.
Davey.
How will worn valve guides effect compression? The valve guides are outside of the combustion chamber. Worn valve seats yes, but not worn valve guides.
I'm not so sure the valve guides have anything to do with the sudden momentary jolt/loss of power you were experiencing. Feels like someone has cut the ignition for a half a second? Lots of cars do this (mine did) and it seems to be somehow related to the speedo transducer being on it's way out.
I think you may have put 2 and 2 together and made 5 upon Dom telling you that the the valve guides were knackered, but in reality they always have been and the judder/jolt is unrelated.
The symptoms of worn valve guides is smoke on a hot start and increasing oil consumption. Overtime enough oil gets drawn into the combustion chamber with each stroke that it starts to cause knock and detonation. This is because oil lowers the knock resistance of the fuel.
This is what happened to my car before I had a full rebuild done, and it needed 3 new pistons as a result of the detonation. It was however drinking a litre of oil every 200 miles
I'm not so sure the valve guides have anything to do with the sudden momentary jolt/loss of power you were experiencing. Feels like someone has cut the ignition for a half a second? Lots of cars do this (mine did) and it seems to be somehow related to the speedo transducer being on it's way out.
I think you may have put 2 and 2 together and made 5 upon Dom telling you that the the valve guides were knackered, but in reality they always have been and the judder/jolt is unrelated.
The symptoms of worn valve guides is smoke on a hot start and increasing oil consumption. Overtime enough oil gets drawn into the combustion chamber with each stroke that it starts to cause knock and detonation. This is because oil lowers the knock resistance of the fuel.
This is what happened to my car before I had a full rebuild done, and it needed 3 new pistons as a result of the detonation. It was however drinking a litre of oil every 200 miles
B3NNL said:
Had a slight judder between 60 & 65 whilst cruising, nothing serious, just a slight hesitation that felt like a missfire.
Spoke with Nick at Fernies and much to his credit, he traced the cars history back to Dom at power, whom I ended up speaking with.
Worse case scenario I thought, "new set of throttle bodies".
Turns out that the valve guides have a bit of wear and only a top end rebuild will cure it!
As a top end will set me back about £3k and a full rebuild will be £5K I may as well go for the full job and get the 3 yr warranty.
Cant quite bring myself to get it done yet, but Dom has offerred to have the car on his dyno, tune the blip out so at least it should be good to carry on for the summer.
Was mentally prepared for having a build at some point of ownership, just not quite this soon into it!
On a side note, very impressed with the help from Nick and Dom and amazed at the cooperation between the two, never seen anything like it in the dealership world before.
Kudos to both Fernies and Power!
How many miles has your car done?Spoke with Nick at Fernies and much to his credit, he traced the cars history back to Dom at power, whom I ended up speaking with.
Worse case scenario I thought, "new set of throttle bodies".
Turns out that the valve guides have a bit of wear and only a top end rebuild will cure it!
As a top end will set me back about £3k and a full rebuild will be £5K I may as well go for the full job and get the 3 yr warranty.
Cant quite bring myself to get it done yet, but Dom has offerred to have the car on his dyno, tune the blip out so at least it should be good to carry on for the summer.
Was mentally prepared for having a build at some point of ownership, just not quite this soon into it!
On a side note, very impressed with the help from Nick and Dom and amazed at the cooperation between the two, never seen anything like it in the dealership world before.
Kudos to both Fernies and Power!
The only reason my engine came out was because of exhaust valve issues..the bottom end did not need touching..but I only found out once it was all apart.....
It depends how important the peace of mind from a warranty is worth..you could always get a reconditioned head from TVR Power fitted:
http://www.tvrpower.co.uk/store/slug/reconditioned...
and get a verdict on the rest of the engine while the engine is out..if it needs a rebuild, so be it, but a lot can be determined by looking at the bores and checking some shells if the sump is taken off..
The car has 39k on the clock, but it has had a rebuild, I'll have to re-check the details again.
@DVS-You've hit the nail on the head, yes I am putting 2+2 together and possibly coming up with 5.
I noticed the juddering, the general PH expertise placed this at ether the coil packs or headers. I enquired about either new headers or coil pack and ended up speaking with Dom, who mentioned the guide wear.
So the two may in fact not be related, but at the end of the day, the guides do have wear.
Being the mechanical "biff" that I am, I'm assuming that this will kill the engine at some stage?
Piece of string question now! What sort of timescale am I looking at here? When it starts, is it usually a quick death or can these things linger on for a while before going pop? What will be the tell tale signs that the engines in its death throws?
I'm the coordinator for Rally for Heroes and was planning to use the TVR for the event, 3000 miles accross Europe, Stelvio, Gross Glockner & Col de Turini etc.
Last thing I want is to be sat at the side of the road before we even reach Dover!
@DVS-You've hit the nail on the head, yes I am putting 2+2 together and possibly coming up with 5.
I noticed the juddering, the general PH expertise placed this at ether the coil packs or headers. I enquired about either new headers or coil pack and ended up speaking with Dom, who mentioned the guide wear.
So the two may in fact not be related, but at the end of the day, the guides do have wear.
Being the mechanical "biff" that I am, I'm assuming that this will kill the engine at some stage?
Piece of string question now! What sort of timescale am I looking at here? When it starts, is it usually a quick death or can these things linger on for a while before going pop? What will be the tell tale signs that the engines in its death throws?
I'm the coordinator for Rally for Heroes and was planning to use the TVR for the event, 3000 miles accross Europe, Stelvio, Gross Glockner & Col de Turini etc.
Last thing I want is to be sat at the side of the road before we even reach Dover!
The tell tale as to the condition of the valve guide wear is engine oil consumption. Start getting to more than a litre every 500 miles or so, it's time to start thinking about getting them done.
Mine soldiered on for a good 12k miles with manageable oil consumption of about a litre every 500 miles until it got silly and gradually degraded to using a litre every 200 miles. Then I had it fully rebuilt by Dom. The engine is unlikely to suddenly fail on you with this condition, although be mindful of working it hard for extended periods as the burning oil can lead to detonation and pinking which will at the least knacker the head gasket fairly quickly and that will leave you stranded.
Mine soldiered on for a good 12k miles with manageable oil consumption of about a litre every 500 miles until it got silly and gradually degraded to using a litre every 200 miles. Then I had it fully rebuilt by Dom. The engine is unlikely to suddenly fail on you with this condition, although be mindful of working it hard for extended periods as the burning oil can lead to detonation and pinking which will at the least knacker the head gasket fairly quickly and that will leave you stranded.
Thanks Dave, It just so happens I bought myself a 5 ltr bottle of oil when I got it last Oct and I've used about 1 & 1/2 ltrs over the past 1200 miles.
I'll still pop upto Doms to put it on their rolling road and get the lumps soothed out, then just treat it nicely for the event in August and hope for the best.
I'll still pop upto Doms to put it on their rolling road and get the lumps soothed out, then just treat it nicely for the event in August and hope for the best.
1.5 litres in 1200 miles isnt a worry at this stage, i would stick with it until you need to change. The engine isnt likely to fail spectacularly if this is the only problem, but the oil consumption may gradually increase.
As for the judder - have a look at my past posts on throttle bodies, it sounds very much like a similar issue.
As for the judder - have a look at my past posts on throttle bodies, it sounds very much like a similar issue.
Are you sure it's the valve guides? My T350 has a slight miss around 5.5 to 6k as well which I've been told is reasonably (cue loads on here telling me otherwise) common by Sebring. If you look at my recent RR scan you'll see the miss as a dip fairly clearly and it's been like that ever since I got the car at 8500 miles (3 1/2 years ago and now on 26k). She had a bottom end rebuild and full top end inspection by Power at 9000 miles so if anything were untowards and causing this missfire I'd have expected it to have shown up then;
Ignore the torque figure BTW!
Ignore the torque figure BTW!
Zippee said:
Are you sure it's the valve guides? My T350 has a slight miss around 5.5 to 6k as well which I've been told is reasonably (cue loads on here telling me otherwise) common by Sebring. If you look at my recent RR scan you'll see the miss as a dip fairly clearly and it's been like that ever since I got the car at 8500 miles (3 1/2 years ago and now on 26k). She had a bottom end rebuild and full top end inspection by Power at 9000 miles so if anything were untowards and causing this missfire I'd have expected it to have shown up then;
Ignore the torque figure BTW!
Tony, not at home to check my graph but I am fairly certain it doesnt show a 7% drop at that point like yours does, dont remember seeing any others that do either but am sure I will be proved wrong.Ignore the torque figure BTW!
Whilst I know Sebring have a good reputation have you asked the question of any of the other specialists out there.
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