S1 2.8 header tank query
Discussion
My header tank has developed a leak so I went onto ACT web site to get a new one, there header tank shows No2 10mm outlets on mine I have No1 10mm pipe going to the expansion tank and the other one has been crimped off, Also on my radiator I have a 10mm hose which has also been crimped off should these be connected together. If not what is the easy way of sealing off the second outlet or can I buy a tank with only No1 10mm outlet
I'm not very familiar with the 2.8 engine as in the S1 but this photo would suggest there is indeed a thin hose going to the left hand top of the radiator.
Presumably an early attempt to clear airlocks, later replaced with a vent screw.
Sadly Ph is not as well frequented as it used to be. Be it good or bad, like it or not, the FaceBook S Series group is far more popular these days.
Mine is a 2.8 S1. There is NO pipe from rad to header tank, and no provision for one on the rad. The parts list doesn't show one either. It would be pointless as it would be below the swirl pot. If you have a header tank with two outlets the old school way of dealing with a redundant small outlet is to fit a short length of tube with a suitable sized plug (bolt!) in it secured by jubilee clamps.
[quote=phillpot]
later replaced with a vent screw.
/quote]
There isn't even a vent screw on the S1, there is however a drain on the lower O/S. It actually looks as if TVR simply turned the radiator the other way up on later cars. It is exactly the same rad on my S3c but a vent top N/S. Looking at the inlet and outlet pipes, which are at different angles, the 'rubber' pipes are different on the two models to accommodate the change in radiator orientation. Neither the S1 or S3c has a small auxiliary water pipe provision.
later replaced with a vent screw.
/quote]
There isn't even a vent screw on the S1, there is however a drain on the lower O/S. It actually looks as if TVR simply turned the radiator the other way up on later cars. It is exactly the same rad on my S3c but a vent top N/S. Looking at the inlet and outlet pipes, which are at different angles, the 'rubber' pipes are different on the two models to accommodate the change in radiator orientation. Neither the S1 or S3c has a small auxiliary water pipe provision.
WotnoV8 said:
I stand corrected 
What year is your car? There were a few early cars made with components from 2.8 Wedge's. For example which servo do you have, some early ones had wedge cortina sourced servos? Do you have one or two bonnet pulls etc etc. I am sure there are some 'development' cars with components I am not aware of. I should perhaps add that it appears the official TVR S1 parts list was not published until some time in 1988 by which time the parts used were pretty well (but not completely!!) standardised
Edited by greymrj on Friday 3rd March 10:05
My car was registered in May 88 and has twin bonnet pulls. It’s quite possible that over the years it has had “mods” carried out when original parts have been unobtainable. Eg later adjustable trailing arms are fitted to my car. (Another can of worms to open!!). My servo is the one with reservoir attached to master cylinder.
My car was first registered 8/1988 it has only No1 bonnet pull, the servo has the brake reservoir fitted to it
The radiator outlet look like the one in Pilpot photo on the very top left of the rad where as Wotnov8 its on the front , so is best to connect the hose to the header tank and is it only for air locks
The radiator outlet look like the one in Pilpot photo on the very top left of the rad where as Wotnov8 its on the front , so is best to connect the hose to the header tank and is it only for air locks
Looks like the double bonnet put went out in June 88, but knowing TVR there may have been overlaps.
Having the reservoir on the top of the master cylinder is unfortunately not definitive on its own! Some early cars have a Ford Cortina sources servo/master cylinder. That is a cylindrical servo and the reservoir is on the top of the master cylinder.
Then by mid 88 we seem to have TVR using both the SAAB 900 sourced unit (separate reservoir) and the later Ford sourced unit (reservoir on top).
Has the car with later adjustable trailing arms had 4 wheel tracking done? I did hear some time ago of a car that has the later arms fitted but there was a problem getting the tracking right?
Having the reservoir on the top of the master cylinder is unfortunately not definitive on its own! Some early cars have a Ford Cortina sources servo/master cylinder. That is a cylindrical servo and the reservoir is on the top of the master cylinder.
Then by mid 88 we seem to have TVR using both the SAAB 900 sourced unit (separate reservoir) and the later Ford sourced unit (reservoir on top).
Has the car with later adjustable trailing arms had 4 wheel tracking done? I did hear some time ago of a car that has the later arms fitted but there was a problem getting the tracking right?
My S1 2.8 also has a small hose from the top of the rad to to the swirl pot, similar to the 2 photos above. It's an early one, built around Jan/Feb '88 and has the Cortina servo. My assumption is that the pipe is to vent air from the top of the rad. There's no drain tap currently, that's one of the jobs on my refurbishment list.
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