• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

TR4/4A Failure of new door-check strap on an early 1961 TR4

Gerald_Gordon

Member
Silver
Country flag
Offline
The second time I opened the driver's door of my 1961 TR4 (CT 281 L) following the replacement of the door-check straps in connection with a respray (the body shop thought that the old ones might allow the door to bump the edge of the wing), the wide end of the elastomeric part of the strap pulled out of the mechanism in the A pillar, and closing the door broke the metal skeleton of the strap. Is there a different strap, perhaps for TR4A, 250, or 6, that would both fit the A pillar of my early TR4 and also be more resistant to this kind of failure? (I am describing the strap from memory, as the failure occurred in April and I have been away from the car since then.)
 

Vila

Jedi Hopeful
Offline
I have heard the later door-checks won't fit on the earlier TR4s, but I have never tried them.

My 1962 TR4 (CT7771L) with the earlier door-checks only had 42,xxx original miles on it when I got it seven years ago. The original checks had been over extended and the doors had dents from hitting the fenders. When I restored the car I got new units, but they are the original early style also.

I read an article a while back about inserting a bolt through the hole in the forward end of the checks to stop them from pulling through, but never tried that since my restoration was far enough along by that point and I could not get to them without taking things apart. As I recall there is a vertical hole in the forward part of the check that will allow you to insert a 3/16 bolt that is long enough to catch before the check pulls through, but short enough to fit inside the forward mount that bolts to the pillar.

Like I said, I have never tried it but it could be worth a try.
 

Mink

Jedi Trainee
Offline
I read an article a while back about inserting a bolt through the hole in the forward end of the checks to stop them from pulling through, but never tried that since my restoration was far enough along by that point and I could not get to them without taking things apart. As I recall there is a vertical hole in the forward part of the check that will allow you to insert a 3/16 bolt that is long enough to catch before the check pulls through, but short enough to fit inside the forward mount that bolts to the pillar.

Like I said, I have never tried it but it could be worth a try.

My straps (CT9796L) were modified like that. I left it that way because it really seems to work well.
 

charleyf

Jedi Knight
Bronze
Country flag
Offline
The check straps have two functions. The main function is to stop the door from opening to far and the second one is to hold the door open at one or more positions. I like you other folks have had failure of the door check strap but in the second function only. I have tried to configure a different remedy but have to admit that it barely works. But I have not had the problem with the check strap totally failing to hold the door. The failures on mine are from the gel type material that is supposed to "hold" the door open deteriorating. If anybody has figured out a remedy for this check strap I would like to see it.
And NO the later TR4/4A straps do not fit. Interestingly the later straps are very similar to the TR3 ones and then used on through the TR6 as well. So their "better idea" on the early TR4 was dropped after a few years. And the remanufacture of the part has not found a material to use to replace the gel type stuff. I am sure with all of our new materials out there a good substitute could be found.
Charley
 
OP
Gerald_Gordon

Gerald_Gordon

Member
Silver
Country flag
Offline
Thank you all for your comments. I will replace the destroyed strap and install the recommended bolts in both straps.

I am wondering, though, how much disassembly would be required. (The car is in another state and not presently available for inspection.) Must either the wings or the interior upholstered panels be removed, or only the check-strap bracket attached to the A pillar?
 

Vila

Jedi Hopeful
Offline
You cannot get to them with the fenders off, the interior footwell side panels need to be removed.

Since you will be removing the door-checks I would put something like a wooden chair with a blanket over the back by the door to keep it from opening to far after detaching the check from the door, otherwise you could damage your doors.
 
OP
Gerald_Gordon

Gerald_Gordon

Member
Silver
Country flag
Offline
Vila,

Thank you for your advice about gaining access to the front ends of the straps from within the footwells. I will ask my mechanic, who has the car in a state halfway across the country, to do what you describe.
 
Similar threads
Thread starter Title Forum Replies Date
Boink Ugly Shock Failure Spridgets 3
G Brake Booster Failure Symptoms Austin Healey 3
C Overdrive Failure Austin Healey 18
K TR2/3/3A Bearing Failure? Triumph 7
W TR6 Seat diaphragm failure on 2nd seat! Triumph 8
T TR2/3/3A Starter failure Triumph 4
B Fan Blade Failure Austin Healey 6
A TR2/3/3A 59 TR3A Clutch Master Cylinder Failure Triumph 19
G Failure on Initial Engine Start After Rebuild Austin Healey 176
G Water Pump Failure - Diagnostic Steps? Austin Healey 16
Griz Shock failure Austin Healey 4
gfholl Axle failure Spridgets 18
T TR2/3/3A Bearing failure Triumph 27
T Pressure plate failure on BE with Datsun 5 speed Spridgets 8
GTP1960 TR2/3/3A Moss Crankshaft pulley failure Triumph 23
T TR2/3/3A Alternator failure Latest Triumph 17
gfholl Major engine failure Spridgets 20
R Suspected Pertronix failure Austin Healey 32
dklawson GT6 GT6 Clutch Failure - Where to Look First Triumph 16
PKPoole TR2/3/3A Distributor Rotor Failure Triumph 3
TomChar TR6 '74 brake failure / oil pressure / ARV wiring question Triumph 19
S Catastrophic engine failure Spridgets 14
Trevor Jessie Common Starter failure? Spridgets 11
T TR2/3/3A Failure in the bush Triumph 18
aeronca65t Mini Hub Failure British Motor Corp 2
K TR2/3/3A Odd Clutch Failure...Clutch crosshaft bushing goes for a walk! Triumph 6
bobh Lower Radiator Hose Failure Triumph 6
A Charging System Failure Triumph 28
richie TR4/4A TR4a Water Pump failure Triumph 10
A Speedometer [cable failure] and repair Triumph 5
RickB Wheel cylinder failure Spridgets 17
M Generator failure? Triumph 7
RomanH Sachs Clutch Disc Failure Triumph 12
T Oil Pressure Gauge braided line failure Austin Healey 6
M Rotor Failure MG 2
dklawson Hs4 Float Bowl Failure Spridgets 11
S How to test a Brake Pressure Failure Switch Triumph 7
nevets Points failure - broken cam follower Austin Healey 3
B 2nd gear blocking ring failure BJ7 Austin Healey 5
M 99 XJ8 Thermostat Housing Failure Jaguar 0
RJS Signs of Water Pump Failure? Triumph 6
GB1 MINI Steering Pump Failure British Motor Corp 4
Michael Oritt Pertronix Ignitor failure mode Austin Healey 8
X T-Series Brake pressure failure switch MG 4
A Ignition rotor recommendations - odd failure Austin Healey 11
Ed_K Early electronic SU fuel pump failure ? Austin Healey 10
Moseso Weird Hydraulic Failure Triumph 8
X T-Series Brake pressure failure switch MG 3
mrsprite Total U-joint failure @ 70 MPH.... Spridgets 13
bill_powell Oil Pump Failure? Spridgets 14

Similar threads

Top