Justin Knight Posted May 16, 2018 Report Share Posted May 16, 2018 My Mk1 Stag has a mk2 saloon 2.5 straight six, would this be regarded as a substantial change, seeing as the stag was originally designed for this engine. Link to comment Share on other sites More sharing options...
KevinR Posted May 16, 2018 Report Share Posted May 16, 2018 Whether or not it is considered a substantial change, why not continue to get the car MOT'd - simply for peace of mind. Just because a car is exempt doesn't stop you from getting it MOT'd anyway Link to comment Share on other sites More sharing options...
Justin Knight Posted May 16, 2018 Author Report Share Posted May 16, 2018 I still intended to get it MOTed anyway, the MOT station is 50yds up the road, I was just curious Link to comment Share on other sites More sharing options...
ShaunW Posted May 16, 2018 Report Share Posted May 16, 2018 Where would you find out if your car needs an MOT? Mines old enough but had an engine swap years ago. I wanted to test drive it for a day or two to shake down the mechanicals before I do the niceties that get you through a test. The V5 says 'Historic Vehicle'. My insurance company already knows about the mod so I'm not trying to deceive anyone. Link to comment Share on other sites More sharing options...
Anglefire Posted May 17, 2018 Report Share Posted May 17, 2018 Well, technically from the 20th, yours will be flagged as MOT exempt - only if you tell them its substantially modified when its next due for tax will the MOT exemption be lost. Depends what engine you've put in and when though as to whether its substantially modified or not. Link to comment Share on other sites More sharing options...
KevinR Posted May 17, 2018 Report Share Posted May 17, 2018 Lots of detail discussion in this thread Link to comment Share on other sites More sharing options...
ShaunW Posted May 17, 2018 Report Share Posted May 17, 2018 6 hours ago, Anglefire said: Well, technically from the 20th, yours will be flagged as MOT exempt - only if you tell them its substantially modified when its next due for tax will the MOT exemption be lost. Depends what engine you've put in and when though as to whether its substantially modified or not. It's a 2.5 from a TR5. Probably done in the 90s but I've no real proof. It's had loads of MOTs in this configuration so the ministry are clearly happy about the safety side. You'd think that if a mod had been MOTed before it wouldn't need to be done again. The V5 shows the correct engine size (2.5) ditto insurance so as far as I'm concern they already know. I'll have to read those threads again. Link to comment Share on other sites More sharing options...
rlubikey Posted May 17, 2018 Report Share Posted May 17, 2018 Hi Justin. While we all know the Stag was designed with the straight 6 in mind, it was never produced as such by Triumph. However, because of the reliability problems with the (potentially excellent) Triumph V8, exasperated owners did engine swaps and both the Rover V8 and Triumph 6 were installed. What you need to do is find documentary evidence that owners were putting in the Triumph 6 within 10 years of the end of Stag production. I think just one example is sufficient - what do others think? Once you have that, I would have thought that you could declare "no substantial change" (well, in the engine department anyway) with a clear conscience. You should read the government guidelines and see if you agree with this train of thought - don't just take my word for it! Cheers, Richard PS: 100% agree with getting MOTs for our cars, even if it's not a requirement. Link to comment Share on other sites More sharing options...
thescrapman Posted May 18, 2018 Report Share Posted May 18, 2018 You are OK Justin as it can be demonstrated as a period modification, so is not classed as substantially modified. i suspect a Ford V6 and Rover V8 would be OK as well. Link to comment Share on other sites More sharing options...
ShaunW Posted May 19, 2018 Report Share Posted May 19, 2018 On 5/17/2018 at 1:14 PM, rlubikey said: 100% agree with getting MOTs for our cars, even if it's not a requirement. I'm always slightly surprised, given that so many people here are children of the 60s and 70s, that more people aren't more pleased to get 'the man' out of their lives in a small way. I'm capable of knowing that my car is safe and I don't really need to pay 40 quid to watch a 20yr old to suck his teeth. Finally we aren't being nannied, if you'd like one get one and if you don't, don't. Hooray. Probably not a common opinion but I'm a confirmed contrarian, or a "trust you to be bloody awkward" as my missus might say. "Freedom for Tooting"! Link to comment Share on other sites More sharing options...
Clive Posted May 19, 2018 Report Share Posted May 19, 2018 Maybe we are getting risk averse? But importantly it is down to me not having brake balance equipment, or even a lift (crawling under 18" high axe stands doesn't count!). And even though I am pretty good at knowing my car, and checking things, I realise I can and do miss things. On the other hand, it is not "us" the responsible owners who I worry about, but those rubbing their hands in glee at the thought of not having to fix things any more. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 19, 2018 Report Share Posted May 19, 2018 I have had 3 cars this year which have failed mot for rear brake problems , oblivious to fairly conscientious drivers having no idea the rears were deficient 1 deatched wheel, cyl held (not) with a tywrap 1 detached linning bonding, 1 cylinder leak and soaked linings So brake test get a hooray from me Pete Link to comment Share on other sites More sharing options...
Anglefire Posted May 19, 2018 Report Share Posted May 19, 2018 I’ve spoken to my local MOT place who did my Spit last year and they will give mine the once over - I don’t want a formal MOT as such - I just want a second pair of eyes over it - predominantly a brake test as that is the bit that is hard to test at home. Though my Land Rover discovery only ever had the pendulum weight thing for at least the last 3 MOT’s being 4x4 and not liking two wheel rollers. Link to comment Share on other sites More sharing options...
AidanT Posted May 19, 2018 Report Share Posted May 19, 2018 I'm not sure why anyone would not have the mot done. Yes you can get a garage to sign off your car without one but then in the worst case scenario and you end up in court which document would hold more weight? Do you actually loose anything by having an official certificate? I'm not sure you do Aidan Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 19, 2018 Report Share Posted May 19, 2018 we seized a 4WD diff up on a Reynold boughton 50 series on our tacho rollers this had a permanent 4wd transfer box they wanted the speed checking. didnt have a tacho , my thoughts were well if the drive is always on it should climb out the rollers with the front wheels nah nah,,, either something was failed befor we got it , hence the speed reading errors, but we went a bit red for a while subsequenlty proved the centre diff had already failed phew !! escape put kettle on... ecsape stage left <<<<<<<<< Link to comment Share on other sites More sharing options...
Anglefire Posted May 19, 2018 Report Share Posted May 19, 2018 29 minutes ago, AidanT said: I'm not sure why anyone would not have the mot done. Yes you can get a garage to sign off your car without one but then in the worst case scenario and you end up in court which document would hold more weight? Do you actually loose anything by having an official certificate? I'm not sure you do Aidan No you don’t particularly- but the skills are being lost on how these old cars should be checked. They are being lost as to how to maintain them and hence specialists are springing up as well as places like this forum. My local one is fine for general inspection- but When they did mine last year they couldn’t get the emissions right and screwed up my carbs because they only adjusted one carb. Link to comment Share on other sites More sharing options...
AidanT Posted May 19, 2018 Report Share Posted May 19, 2018 Guess I'm lucky. My mot place is run by a guy with his own classics. He's passing on his knowledge to the young recruits! As for emissions no smoke is a pass for them! Aidan 1 Link to comment Share on other sites More sharing options...
Anglefire Posted May 19, 2018 Report Share Posted May 19, 2018 Yeah I know that now! They are a good bunch overall - just not 100% up on the vagaries of classics. How many look at them and say - its got a chassis so the hole in the sill doesn't matter? Link to comment Share on other sites More sharing options...
NonMember Posted May 19, 2018 Report Share Posted May 19, 2018 1 hour ago, Anglefire said: When they did mine last year they couldn’t get the emissions right and screwed up my carbs because they only adjusted one carb. When I worked for Rover in the 1990s, my boss reminisced about his Dolomite Sprint he'd had as a company car in the 1970s. He said he always instructed the BL main dealer to leave the carbs well alone because they had screwed them up by only adjusting one of them. It's not a matter of lost knowledge, it's a matter of stupidity. 1 Link to comment Share on other sites More sharing options...
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