radiator cap

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daz350
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Joined: Fri Dec 08, 2017 6:46 am
Location: gloucester

radiator cap

Post by daz350 »

Need a new one is there another supp;ier to get one from or just order from honda
tony.mon
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Re: radiator cap

Post by tony.mon »

There are two ratings, I can't remember now which one is better, but think one is 1.1 bar and the other is 1.3.
It's not falling off, it's an upgrade opportunity.
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Wicky
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Re: radiator cap

Post by Wicky »

https://www.superhawkforum.com/forums/t ... post402357

I think this what Erik is recommending - probably cheaper than Honda charge for OEM even with shipping!

https://www.ebay.co.uk/itm/Stant-10363- ... 2766354036

OEM Honda one is fitted to what looks like just about all watercooled Hondas up until 2007
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E.Marquez
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Re: radiator cap

Post by E.Marquez »

The OEM cap is a 1.1 Bar, you can get one from Honda, or your local auto parts house as many Japanese cars use the same cap style. In the US, the brand would likely be Stant and cap is 10242 Radiator Cap - 1.1bar (16psi)

In that brand if you want a higher pressure cap to increase boil over temps you can get Stant 10363 Racing Radiator Cap 2.0 bar ( 29 psi)
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E.Marquez
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Re: radiator cap

Post by E.Marquez »

Oh and dont forget, your cooling system is only as good as its weakest link...so if you have a seep now and the tell tail sign of the sweet smell, the high pressure cap will only make it worse.
If you have any dodgy hoses, clamps, or even O rings on the carb heater line fittings, water neck, ect you will find them with a properly fitted cap that is holding pressure.
Great time to upgrade to full silicone hoses and proper clamps, replace those O rings and the seal for the thermostat.

SAMCO makes some really nice coolant hoses for our bike but pricey...on a dare I was asked to try the Ebay copies available for a fraction of the price and Im happy to say 2 years later they are still going strong.

The other coolant lines are 8mm(5/16)...I use a company called HPS http://www.hps-siliconehoses.com they also have silicone vacuum line that works perfect for the carb and other vacuum line needs.
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daz350
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Re: radiator cap

Post by daz350 »

Was looking at some hoses https://www.ebay.co.uk/itm/HONDA-VTR-10 ... %7Ciid%3A1 after 19 years might need to replace them.
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E.Marquez
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Re: radiator cap

Post by E.Marquez »

daz350 wrote: Thu Oct 25, 2018 6:10 pm Was looking at some hoses https://www.ebay.co.uk/itm/HONDA-VTR-10 ... %7Ciid%3A1 after 19 years might need to replace them.
Yup thats them, did not think they would last, but they are holding up just fine.
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daz350
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Re: radiator cap

Post by daz350 »

Got an oem cap after all seems to have stopped the coolant bottle from getting pressurised.Got a set of hoses on order prob change the thermostat as well.
tony.mon
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Re: radiator cap

Post by tony.mon »

The coolant reservoir should never be pressurised as the vent hose running from the bottle to the lower left side of the oil filter should vent to atmosphere.
It's not falling off, it's an upgrade opportunity.
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