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Post by billyboy on Sept 11, 2013 21:57:46 GMT 1
anybody using one of these succesfully on their 4lo ?
particularly the fahler branded ones
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Post by grunt33 on Sept 12, 2013 8:45:47 GMT 1
i have one but my bike has not turned a wheel in anger since I fitted it
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Post by oldelsieboy on Sept 12, 2013 10:13:46 GMT 1
anybody using one of these succesfully on their 4lo ? particularly the fahler branded ones If it physically fits & has the correct pressure rating you should be OK. OEB |
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Post by Norbo on Sept 12, 2013 13:23:41 GMT 1
I thought it was a Toyota one that fitted
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Post by johnlc on Sept 12, 2013 17:16:54 GMT 1
I have a toyota cap on mine cant remember exact model possibly cressida but not 100percent sure
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Post by billyboy on Sept 12, 2013 18:54:00 GMT 1
i'll lay off buying one till i know for sure then , heard escort ,capri now toyota  |
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Post by oldelsieboy on Sept 12, 2013 19:10:41 GMT 1
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Post by billyboy on Sept 12, 2013 21:14:17 GMT 1
thats why i'm confused OEB , lots of different answers ,not sure which one
maybe i should be asking the correct pressure rating for a 4l0 rad on a valve motor hybrid with the thermostat drilled
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Post by grunt33 on Sept 12, 2013 21:50:02 GMT 1
sorry mate mine is the Cressida one but that far-ler looks trick
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Post by billyboy on Sept 12, 2013 22:17:38 GMT 1
thanks grunt ,13 psi on the ones iv'e found ,dont know if thats ok ?
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Post by turbopresh on Sept 13, 2013 1:13:03 GMT 1
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Post by oldelsieboy on Sept 13, 2013 7:13:45 GMT 1
A 4L0 radiator cap should be rated at 0.9 bar. OEB |
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Post by 47x on Sept 13, 2013 11:53:08 GMT 1
Toyota mr2 mk1 rad cap fits lc"s
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Post by hardhatharry on Sept 13, 2013 13:36:21 GMT 1
I had the toyota one and it leaked, now have a Yamaha one £40 I think eeek!!!
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Post by turbopresh on Sept 13, 2013 13:49:15 GMT 1
Search motorcycle rad cap on eBay.. stainless 0.9 bar caps for £8.95 +p&p
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Post by steven on Sept 13, 2013 14:02:42 GMT 1
Hi,
As already posted by someone, a 4L1/4L0 radiataor cap should be rated at 0.9 bar or 13 psi.
I bought one of the Fahler ones, and it fitted perfect, and looked lovely and was rated at 13 psi.
I tested several other old 4L1/4L0 caps I had laying about.
I tested them by conecting up a bycicle pump to an LC radiator and blanking the water pipe connections off, fitting a pressure gauge then fitting the caps.
My findings were.....out of 5 old LC radiator caps, all but one lifted well below 0.9 bar / 13 psi, only one lifted at the correct pressure.
The Fahler one lifted at 8 psi, even though it was rated at 13 psi.
I went to my local motor factors with an old cap and we looked through all the 13 psi radiator caps till we got one that suited. It was a Quinten Hazle FC52, it fitted ok and lifted at the proper pressure, the lugs were slighly bigger than an LC one but it still fitted and worked fine, it was about £3.
It is very importaint that the correct pressure rating of cap is used, as pressurising the cooling system raises the boiling point of the coolant inside the system.
steven.
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Post by billyboy on Sept 15, 2013 0:25:06 GMT 1
Cheers all ,but i have just found the later cressida one is way too small , hope the seller takes it back !
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Post by rich on Sept 15, 2013 11:14:13 GMT 1
Hi, As already posted by someone, a 4L1/4L0 radiataor cap should be rated at 0.9 bar or 13 psi. I bought one of the Fahler ones, and it fitted perfect, and looked lovely and was rated at 13 psi. I tested several other old 4L1/4L0 caps I had laying about. I tested them by conecting up a bycicle pump to an LC radiator and blanking the water pipe connections off, fitting a pressure gauge then fitting the caps. My findings were.....out of 5 old LC radiator caps, all but one lifted well below 0.9 bar / 13 psi, only one lifted at the correct pressure. The Fahler one lifted at 8 psi, even though it was rated at 13 psi. I went to my local motor factors with an old cap and we looked through all the 13 psi radiator caps till we got one that suited. It was a Quinten Hazle FC52, it fitted ok and lifted at the proper pressure, the lugs were slighly bigger than an LC one but it still fitted and worked fine, it was about £3. It is very importaint that the correct pressure rating of cap is used, as pressurising the cooling system raises the boiling point of the coolant inside the system. steven. Interesting stuff and another of those things we take for granted. I wonder how many head gaskets have unnecessarily been changed because the cap was opening too early? Might have to track down a QH cap for mine now. |
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Post by billyboy on Sept 15, 2013 16:57:00 GMT 1
what actually happens when a cap 'opens' ? does it actually let fluid out ?
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Post by steven on Sept 15, 2013 23:56:15 GMT 1
Hi,
When the coolant heats up it expands, the expanding coolant causes pressure to be built up in the cooling system.
If the pressure in the cooling system reaches 13 psi, the cap opens and releases coolant to the expansion tank.
Also........theres more........lol......Once the engine cools down and the coolant starts to contract, there is another valve on the radiator cap that opens and lets the coolant be drawn from the expansion tank back into the radiator if required.
As Rich said, its something we all take for granted.
The boiling point of water is 100 deg C.......but that is only at atmosheric pressure.
If you put the same water in a vacuum it would boil at a lower temperature, or, if you pressureise the same water it would need to be a good bit higher than 100 deg C before it boiled.
Thats why we pressureise our cooling systems, so that the water in the cooling system boils at a higher temperature, hopefuly making it more dificult for our coolant to boil.
I was quite alarmed at the brand new one opening at 8 psi.
The QH FC 52 fits, but I keep meaning to take a file and file a tiny bit off the cap lugs, as you have to give it a wiggle to get it off.
steven.
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Post by bare on Sept 16, 2013 0:07:00 GMT 1
Small Extraneous viewpont :-)
These 350's reputedly run best (track use wise) at 50/55 C.
For Retail customers 80c was the OEM fitment when a Thermostat was fitted to LC's..ie; Japan market and 80c remained, I believe, as the Valvie's thermo setting as well.
Yama consistently maintained that 85 C WAS overheat!
That is a fair bit below where Rad cap pressurisation capability is of Any import.
As in, IF it's pressurising, something serious is knackered... or soon will be.
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Post by billyboy on Sept 16, 2013 19:13:03 GMT 1
cheers again all , steven is the main body of the fc52 one steel or ali ? just want something that looks a bit bling as well
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Post by steven on Sept 16, 2013 19:52:55 GMT 1
Hi,
Its steel, silver in colour and plated, im guessing zinc or galv or something like that?
It says.... TIGHTEN-------> & REMOVE SLOWLY <-----------------
LBS 13
G.910
MADE IN ENGLAND.
I got mine at a local motor factors, but im sure iv seen quinten hazel stuff in halfords.
there are postings on here or on the Lc club website somewhere regarding all the various caps and what ones fit.
the falher one looked really good, it was cromed or polished and was really shiny, mabey i got a bad one, not sure, i think it did say "show cap" on the box.
steven.
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Post by billyboy on Sept 16, 2013 21:41:45 GMT 1
thanks for that , if anybody else is thinking of getting a toyota cressida cap - dont cos the fahler one i bought is too small
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