Rebuilding the hood frame & attempted trial fitting

 Exterior Trim, Hood, Trim & Body Fittings  5 Responses »
May 162016
 

The trimmers, Suffolk & Turley, suggested that it would be useful to trial fit the hood frame before bringing the car up to fit the soft top. The only two adjustments I could find were moving the mounting brackets fore and aft and adding shims underneath the bracket to raise the frame away from the body. So it shouldn’t be too difficult …. I really should know better by now!

Parts problems
S & T had inspected the hood canopy and condemned it to the scrapheap but, by chance, Martin Robey had just one remaining in stock. It was purchased on the spot to avoid any further delays, despite the eye-watering cost. When it failed to turn up several days later Robeys received a chase up call. It was only then that they admitted they didn’t actually have any in stock. It would be several weeks before a new batch were manufactured. The new canopy eventually finally turned up some two months later. It was very frustrating, although worse was to come …!

The ‘complete’ hood frame bolt set (SBS9069) from SNG Barratt wasn’t much better! The one thing you could say about it, it was anything but complete! Some smaller washers didn’t fit any of the bolts in the kit and all the brass washers (2x BD541/22 & 2x BD541/23) were missing for the pivot joint between the links and the front canopy.

Their bolt set appears to be just for the parts to attach the folding links to the hood frame sticks. The four ‘special’ bolts and brass washers securing the frame to the chassis need to be purchase separately; the bolts pivoting the main sticks (BD19160) and the bolts fixing the control link to the chassis body (BD19393).

The SNG website suggests 8 brass washers (BD541/30) are required for these four special bolts. However the bolts have different diameters, so I found it required only four of these larger washers for the pivot joint for the main sticks. The control link bolts require four of the smaller washers, BD541/23.

To be fair to SNG Barratt, the parts of their website had been taken from a parts lists produced by a third party which I suspect is incorrect. SNG even supplied the missing/incorrect pieces free of charge which was a nice gesture. However the toing and froing added yet more unwelcome delays.

Trial fitting the hood frame
The first task was to loosen the various pivot points in the frame links which had been locked in position by the powder coating and re-tap all the screw threads. A sharp blade was sufficient to break the paint seal on the joints to allow a light oil to be worked in, until they were well lubricated and operating smoothly.

The hood sticks pivot on the special bolts which pass through the chassis mounting brackets. It was a tight squeeze inserting the brass washers that sit either side of the pivot points to aide rotation. A screwdriver was needed to prise open the brackets to insert the second washer. Fortunately the bolt has a tapered shoulder which helps pull the final washer into alignment.

Shouldered pivot bolt screws
Note: lubrication hole for pivot joint		 Two brass washers are fitted per side.
Brackets are handed & bolt heads face inwards
So far so good – the hood sticks fitted! Shims may be needed under B-post brackets

The two folding mechanisms (or links) are attached to the hood sticks by two bolts each side. A further bolt secures their control link arm to the chassis, on inside of the B-post. Again brass washers are fitted to each joint. One thing I’ve noticed on most cars is the control link arms rub against the vinyl covered B-post trim, causing unsightly wear damage. When I have more time, I plan to investigate whether a spacer can be fitted, to lift the control link away from the trim.

The cantrails are simply bolted to the folding mechanisms and don’t have any adjustability.

Folding mechanism in place Cantrails and canopy link added

A watertight seal between the hood and drop glass (don’t laugh!) is created by sections of rubber moulding attached around the cantrails and the vertical main pillar posts. A lip to receive the rubber is created by small angled brackets which are just riveted to the cantrails (the lip is integral to the main pillar pieces).

There was some evidence that these brackets had been repositioned as there were several sets of drilled holes. I had assumed this was to fine tune their alignment with the drop glass. However, rather oddly, only one set of holes matched those in the cantrail. So I’m a bit mystified what had gone on in the past. I do know, from the bodging of the canopy, the hood has been apart at some stage.

Riveting brackets to cantrail rubbers

The range of travel of the canopy is limit by a stop stud attached to the link mechanisms. From the closed hood position, the front of the canopy can be raised slightly, until the stop studs are reached. At which point, pushing the canopy further up causes the link mechanisms to start folding.


New & old hood stop studs

Unfortunately both studs were rusted firmly in place and so the only option was to carefully cut each nut off with a Dremel. The remains of the studs were then used as a pattern in fabricating replacements in stainless steel.

The studs have clearly been designed to allow for a small degree of adjustability because the threaded section is not concentric with the main body of the stud. Rotational adjustment is made via the screwdriver slot. I’ve not been able to work out why this is needed.

Finally the hood canopy was fitted. As the strengthening wood bow still needs to be fettled to fit the canopy, it was only possible to fit the outer two hood retaining clamps at this stage. The fit of the brand new Robey canopy was truly shocking. It wasn’t even close.

The curvature of the front of the canopy is all wrong. The front centre section bends downwards too much so it is in hard contact with the windscreen chrome when the clamps are engaged. Also the outside corners protrude too far and there’s a substantial gap to the same chrome trim. I’ve had trouble with some replacement parts but this is about as worse as it gets.

The new Robey canopy fitted Fit along windscreen is atrocious
Daylight through the gap Each side also protrudes too far

The fit is so poor I had to abandon thoughts of completing the trial fitting and called Suffolk & Turley to discuss my options. It will take extensive sheet metal work to rectify. Fortunately RS Panels are next door to S&T. They will be asked to undertake the panel work to obtain a good fit before the trimming of the hood canvas.

It was not the first time they had come across this problem with Robey canopies. Something that really shouldn’t be necessary on a new panel, especially when charged such an extortionate price. I suspect they just churn them out thinking if they look about right they’ll have got away with it. By the time the customer finds out, it will probably be too late. There’s no excuse for it.

The impact was that it hadn’t been possible to have the hood fitted before heading off travelling for six months. I had hoped to arrange for the hood work to be done while I was abroad, so I could return to a completed car. However the logistics and available slots in people’s calendars meant it wasn’t to be.

Starting the hood refurbushment

 Exterior Trim, Hood, Trim & Body Fittings  No Responses »
Mar 252015
 

New hood pivot bolts

The removal of the hood many years ago had been problematic to say the least. The threaded section of the pivot bolts is a much smaller diameter than the unthreaded section, which the hood sticks pivot around. The bolts wouldn’t come free even after applying penetrating fluid and adding an extension piece onto the ratchet handle. The force being applied was more likely to shear the threaded section, so I stopped to have a re-think.

However the problem wasn’t that the threaded sections had seized within the bracket’s captive nuts as I had thought. Small holes are provided in hood sticks for oiling the pivot joints. Unfortunately it’s doubtful they had ever been troubled during routing maintenance!

The result – the whole pivot joint had rusted, fusing the bolt to the hole in the frame. The hood no longer pivoted on the bolts. The bolts and frame just rotated in unison in the mounting brackets, as the hood was raised and lowered. The only way I could then remove the hood was complete with mounting brackets.

I couldn’t believe how solidly they had rusted in place. In a foolish fit of pique, I ground away the heads of the bolts, which were looking decidedly rounded by this time. Cutting through the threaded sections to finally free the hood from the brackets. The whole hood was left, as is, until now so I still had to overcome the issue of removing the remains of the bolts.

The remaining sections of the bolts wouldn’t budge even after soaking in Plus Gas penetrating fluid for several weeks, applying heat, attempting to press them out in a vice and, in a Cleese-esque manner, giving them a good thrashing with a club hammer!

The hood needed a full overhaul Every hood fixture was heavily rusted First, removal of the old canvas

The plan is to have the hood professionally fitted by Suffolk & Turley. Even though they will happily undertake all the work, including the renovation of the frame, I wanted to do as much as possible myself. So I set about removing the canvas and dismantling the frame into its components on order to have them powder coated.

First, the canvas was detached from the rear of the frame – by removing the side chrome trims, which clamp the canvas rearward of the drop glass and unpicking the webbing attaching it to the frame sticks. Removing the hollow, square-sectioned rubber seal, which makes the seal against the top of the windscreen, reveals the canvas and vinyl edges in the channel underneath. The canvas and vinyl could then be pealed off the canopy, while applying heat to soften the adhesive.

Main head/cantrail brackets attached to frame Bonded edge of canvas/vinyl under screen seal Vinyl removed revealing wood canopy bows

The detaching the cantrail and main head brackets also proved troublesome. The removal of the pivot bolt remains was soon joined by the need to remove half a dozen screw stubs. Some of the screws fixing the main head/cantrail brackets and hood clamps had sheared or had to be drilled out. Their slotted heads had become too damaged by attempts to unscrew them.

Latch covering trim under two canopy mounting bolts Softening old adhesive with white spirit

The pivot bolts were removed by drilling a pilot hole down the centre of the bolt. It was more important to keep the pilot hole square on to the bolt than ensure it was precisely centred on the bolt. Progressively larger drill bits were used to enlarge the hole until a line of rust could just be seen running down the length of the hole. A pointed drift was then used to collapse the perimeter of the bolt inwards allowing the bolt remains to be pushed out.

The same approach was followed for the screw remains in the hood sticks. Although this time it was essential that the drill bit was centred on the bolt so the thread wasn’t damaged. They were then re-tapped to reinstate the thread.

Initially the canopy didn’t look too bad but it had clearly been worked on before as the whole frame had been hand-painted a light blue rather than the original light grey. The forward wood bow had a small section missing and it had started to delaminate. The edge of leading edge had rusted away along the entire length of the canopy although it should just be a matter of welding in some new metal.

The leading edge has rusted away The wood bow was also delaminating Re-tapping the frame after drilling out screw stubs

A second opinion was needed so it was taken up to Suffolk & Turley in Nuneaton. Their evaluation was not good, enquiring whether I’d found in it a canal! In addition to the problems I’d spotted, they pointed out that the lip where the two outer skins meet had been cut away at one end. It should be proud of the wooden bow by approx. 2cm as it forms the upper part of the channel for the rubber seal. Also, the front 6 inches across the full width of the canopy was largely filler.

Their preference is to re-use original parts rather than replace. The replacement wood bows are available but the quality is not great and it takes some work to get them to fit. Even so, their verdict was it wouldn’t be cost effective to repair the metal canopy and the front wood bow was unlikely to survive its removal. Only the rear wood bow was worth saving, as these are no longer available.

It was a long way to travel to learn that the canopy was junk and I was now resigned to inevitable fleecing that was coming my way! Both for a new metal canopy and a wood bow, which I believe is north of £300 from SNG Barratt!

As luck would have it Martin Robey had one S2 canopy left in stock so it was secured on the spot. A week or so later it hadn’t turned up so I gave them a call. It was ‘virtually’ in stock … they just had to make it first! Two months later it finally arrived.

In the meantime I’d found a Czechoslovakian subsidiary of the German company Slavik, which made all the wooden components for earlier Jaguars, and at a very reasonable cost of £75 for the wood bow. They were making a trip to the UK a few weeks later and suggested sorting out the payment and shipping once over here. Needless to say, I didn’t hear from them so I presume they forgot to bring it and I got no response from follow up emails.

Trial fitting the rear bow to the new canopy Replacement canopy wood bow

Finally a piece of luck, a wood bow appeared on eBay. I’d lost so much time waiting for parts, I contacted the seller and agreed a private sale, rather than wait until the end of the auction. A trial fit of the bow with the new Robey canopy confirmed it will need a fair amount of fettling to get it to fit.

Now I had all the components, it was off to Nationwide Coatings”to have them powder coated in BS381C-694 ‘Dove Grey’. The advice from the E-Type forum was that this was the correct/nearest colour match. Typical …. the powder coating manufacturers no longer supply powder covering the old BS381C range!


Original paint allowed a colour match

Traditional paints do not adhere to powder coating. However new paints have been produced specifically for this purpose. So they recommended powder coating the hood components to the nearest light grey colour available and then over-coating with a colour-matched paint. A couple of parts had hidden surfaces that missed being hand painted in blue so they will be used to get an exact match to the original colour. The powder coating should provide the durability while maintaining the correct colour.

My aim had been to get the car ready for a trip to the Monaco Grand Prix at the end of May. This is now looking to be a very long shot, having lost two months waiting to just trial fit the hood. Also, in a nod to practicality, I’d decided to fit inertia seat belts rather than static seat belts. These have been on order since the New Year and there’s still no confirmed delivery date. The fitting 3-point Seat belts became mandatory from 1968, so I won’t be able to get an MOT until they do.