Rad cap 13 or 15lbs?
Discussion
New expansion tank going in and the old 15 does not seal, there is a 13 that seals and I have just got a slightly different reach 15 from the factors that does seal. Main question really, 2lbs have that much of a difference on a rad cap?
If it works the old expansion is up for grabs but looking at it I am not sure how long it has got. The metal inserts are bulging with corrosion under the plastic.
Wonder if it is possible to drill out the metal inserts, very carefully of course, and use sans inserts? Obviously they will be weaker but might extent the life?
If it works the old expansion is up for grabs but looking at it I am not sure how long it has got. The metal inserts are bulging with corrosion under the plastic.
Wonder if it is possible to drill out the metal inserts, very carefully of course, and use sans inserts? Obviously they will be weaker but might extent the life?
The ones I had made were 15 and even that isn't strong enough to keep water in under all conditions, so it's best to use them with a catch tank if there is room.
You might not want to go higher 'cos hoses and seals might start to go. The difference between 13 and 15 is probably 10C in boiling point, once it boils you start to lose water very rapidly. However there is also the tolerance of the psi rating of the cap, they are probably no better that 10% when brand new.
You might not want to go higher 'cos hoses and seals might start to go. The difference between 13 and 15 is probably 10C in boiling point, once it boils you start to lose water very rapidly. However there is also the tolerance of the psi rating of the cap, they are probably no better that 10% when brand new.
I'll have one. Just been for a run and its all hunky dory. BUT noticed a chaffing on the hose from the swan neck to the thermostat (not touched that with this tank change) and its weeping 
Do you think anyone local sells the stuff? No. Might be a the fest in the festa Local factors has ordered some stuff, demon tweeks has sent some, should be OK.
Do you think anyone local sells the stuff? No. Might be a the fest in the festa
Local factors has ordered some stuff, demon tweeks has sent some, should be OK.
Its in the inside of the bend. The tensioner for one of the belts has chewed it, can almost poke my finger through. Looks recent as well but I can see no reason why, rad seems solid so I think there is an issue or two I cannot find. Been checking the pipe off the rad to the extension pipe and that has chaffed as well. I have 35mm straight and some other stuff but cannot get it to keep out of the tensioner way. The 35 mm crushes tight so there will be flow issues.
Nearest LR dealer is Cardiff or Swansea so think I am on a hiding to nothing. We are coming up tomorrow.
Think I will bite the bullet and just order a pack off ACT and come up in the boringmobile.
Nearest LR dealer is Cardiff or Swansea so think I am on a hiding to nothing. We are coming up tomorrow.
Think I will bite the bullet and just order a pack off ACT and come up in the boringmobile.
adam quantrill said:
The ones I had made were 15 and even that isn't strong enough to keep water in under all conditions, so it's best to use them with a catch tank if there is room.
You might not want to go higher 'cos hoses and seals might start to go. The difference between 13 and 15 is probably 10C in boiling point, once it boils you start to lose water very rapidly. However there is also the tolerance of the psi rating of the cap, they are probably no better that 10% when brand new.
The rise in boiling point isn't that much; IIRC it's 1.5C per PSI. I used to fit a 20 for track days. Whether you can get away with a 13 will depend on your car and how you drive. Gentle driving and clear rad and waterways will make a big difference.You might not want to go higher 'cos hoses and seals might start to go. The difference between 13 and 15 is probably 10C in boiling point, once it boils you start to lose water very rapidly. However there is also the tolerance of the psi rating of the cap, they are probably no better that 10% when brand new.
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