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23rd April 2017, 11:37 | #1 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Expansion tank cap 'O' rings
I've been looking at mine today with a view to renewal and have made a surprising discovery. I don't remember this being mentioned on the forum.
The two 'O' ring retaining channels on my original cap (rated '100') are different sizes. Measured with a vernier caliper, the top one is 24.1 mm diameter and the lower is larger at 25.1 mm. So I checked (as best I could) the OD of the two original 'O' rings and, sure enough, there was a difference of 1 mm in the diameters of these too. So it appears that two new 'O' rings of differing sizes are required. I wonder whether the aftermarket suppliers of these for the 75/ZT have spotted this? Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
23rd April 2017, 12:28 | #2 |
This is my second home
rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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Indeed Simon, Jack who supplies the viton replacements, even sends instructions where to fit each different sized ring
So at least he is aware |
23rd April 2017, 14:33 | #3 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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So not a new discovery on my part then!
Who is Jack please Ronnie? Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
23rd April 2017, 14:38 | #4 | |
This is my second home
rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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Quote:
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23rd April 2017, 21:40 | #5 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
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Thanked 3,749 Times in 3,181 Posts
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Thank you very much Ron. I can always rely on you for a swift and appropriate reply.
Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
23rd April 2017, 21:42 | #6 | |
Premium Trader
Rover 75 Join Date: Nov 2010
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Lest we forget..
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24th April 2017, 22:33 | #7 | ||
Give to Learn
Freelander 2 Join Date: Aug 2010
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Quote:
Drop me your address and name and I will pop some in the post for you, I have been fitting these at nano meets for ( FOC ) since about 2012 I purchased about 150 of each size along with the intercooler rings, after finding out about them in 2011, I am almost sure I did a write up about it back then. I would think if every member went out and checked the coolant cap 9 times out of 10 the O-rings will be flat and need changing. They are Viton ones cheers Arctic
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Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " Last edited by Arctic; 12th January 2019 at 11:30.. |
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