Any problems in modifying a late Sprint bumper to take early number plate light unit?

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GrahamFountain
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Any problems in modifying a late Sprint bumper to take early number plate light unit?

#1 Post by GrahamFountain »

Are there any problems in modifying a late Sprint bumper to take the single large number plate light unit?

I take it that modifying a 913434 is too much like hard work. Anybody want one?

Graham
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#2 Post by soe8m »

When you have drill I don't see any problems.

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Carledo
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#3 Post by Carledo »

Forgive ignorance, what is 913434? Toledo?

Only minor difficulty is drilling through chrome.

Steve
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#4 Post by GrahamFountain »

Carledo wrote: Tue Jul 28, 2020 8:49 pm Forgive ignorance, what is 913434? Toledo?
Steve
I don't know either. It has holes for single number plate light, but none for the chrome coach bolts, and different internal brackets for the bumper irons.
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The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).
Carledo
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#5 Post by Carledo »

Ah! Think that is the early 1850 bumper! IIRC, it needs the matching bumper irons to fit properly.

Probably also 1500FWD.

Steve
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#6 Post by GrahamFountain »

Ok, but I can't find any reference to different irons beyond this thread https://forum.triumphdolomite.co.uk/vie ... 75#p252660, which includes this picture:
Image

The upper bumper being PN 913434 and the lower being 917657 - though I think XKC1680 would look the same.

The thing there is the "old" iron looks to me to be the same as the "new" one, suggesting the difference is in the mounting on the car and the irons to mount 913434 in place of 917657 would have to be made special. Given that 917657 is only about £50 new (don't know if that NOS or Rimmer "quality" remanufactured), seems unlikely to be worth it.

Graham
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).
Carledo
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#7 Post by Carledo »

GrahamFountain wrote: Wed Jul 29, 2020 12:45 pm Ok, but I can't find any reference to different irons beyond this thread https://forum.triumphdolomite.co.uk/vie ... 75#p252660, which includes this picture:
Image

The upper bumper being PN 913434 and the lower being 917657 - though I think XKC1680 would look the same.

The thing there is the "old" iron looks to me to be the same as the "new" one, suggesting the difference is in the mounting on the car and the irons to mount 913434 in place of 917657 would have to be made special. Given that 917657 is only about £50 new (don't know if that NOS or Rimmer "quality" remanufactured), seems unlikely to be worth it.

Graham
Look more closely at the pics of 917657 and you will see there are spacers between the iron and the bumper to space it back, this is how to use the later bumper on an early car with early irons. But it doesn't work the other way round unless you want to cut an inch or so out of the late irons (4 places) to make an early bumper fit a late car. (Early irons have long been NLA) Or fab your own irons as you suggested.

As you say, with the correct bumper being available, why bother? Someone who OWNS an early 1850 will probably be pleased to take the 913434 off your hands!

Steve
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.
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Re: Any problems in modifying a late Sprint bumper to take early number plate light unit?

#8 Post by GrahamFountain »

Carledo wrote: Wed Jul 29, 2020 9:10 pm
Look more closely at the pics of 917657 and you will see there are spacers between the iron and the bumper to space it back, this is how to use the later bumper on an early car with early irons. But it doesn't work the other way round unless you want to cut an inch or so out of the late irons (4 places) to make an early bumper fit a late car. (Early irons have long been NLA) Or fab your own irons as you suggested.

As you say, with the correct bumper being available, why bother? Someone who OWNS an early 1850 will probably be pleased to take the 913434 off your hands!

Steve
Looking closely at the pic of 917657, the spacers are clearly not nearly, by about an inch, long enough to fit the later bumper on an early car with early irons.

Graham
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).
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