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Post by neilf on Jun 21, 2021 14:09:17 GMT
Fu*ckity, fu*ckity fu*k! Bloody replacement rad is different to the one fitted to my bike; fan position is different and the cores are thinner!
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Post by neilf on Jun 24, 2021 10:48:09 GMT
The original rad from my bike is on the right, supplied rad on the left which was listed as suitable for my GSX-R750 K5  Looking through eBay, there appears to be several variants of my bike available; U2, X and XU2. Another rad ordered, which should be arriving today... has anyone heard of this before? Clipper? |
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Post by Diego the toe clipper on Jun 24, 2021 11:26:29 GMT
According to Suzuki, there is the GSXR750 with several market codes including E-02 for the UK, and then the GSXR750UF which is listed as only for the E-19 code EU market.
The manual doesn't mention any differences in either radiator or fan between the two variants though.
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Post by Diego the toe clipper on Jun 24, 2021 11:30:07 GMT
What's the part number on the "wrong" rad Neil?
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Post by neilf on Jun 24, 2021 12:28:03 GMT
What's the part number on the "wrong" rad Neil? Not sure, I'll have a look when I get home. My rad looks very similar to the one for the K6. |
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Post by Droog on Jun 24, 2021 13:50:35 GMT
I was about to take a wild guess that the replacement rad you purchased was probably for a 600 or another similar model. But a quick Google proved otherwise. A few pattern part retailers list a similar rad to the one you purchased. Maybe it will fit and work but isn't a direct replacement. Could be a different shape just to cut down on production costs as it would be easier to produce.
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Post by neilf on Jun 24, 2021 15:01:58 GMT
I was about to take a wild guess that the replacement rad you purchased was probably for a 600 or another similar model. But a quick Google proved otherwise. A few pattern part retailers list a similar rad to the one you purchased. Maybe it will fit and work but isn't a direct replacement. Could be a different shape just to cut down on production costs as it would be easier to produce. The bottom mounting lug on the rad is about 1.5" higher that the mounting bracket on the bike, plus the fan mounting points are quite different. The 600 and 750 K4/K5 are essentially the same model; the only major difference is the engine. |
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Post by elnoodle the reasonable on Jun 24, 2021 16:36:29 GMT
I'm surprised that a 600 and 750 would have the same cooling requirements. Has the bigger engine got a higher capacity pump to increase flow rate?
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Post by Diego the toe clipper on Jun 25, 2021 5:50:48 GMT
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Post by neilf on Jun 25, 2021 10:08:23 GMT
It's almost identical, except from that one is missing the temperature sensor on the right hand side when compared to the one that I received, plus the fan mounting points are different.
Either way, the rad which was initially sent is going back to the seller. The correct item turned up yesterday from a different seller on eBay, so it's been fitted, no leaks, the fan kicks in at the right temperature and I'm picking the bike up today. Apparently the bike had lost 2 litres of coolant!
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Post by neilf on Jul 19, 2021 12:23:57 GMT
More cooling/heating woes with the K5.
During normal riding, out on the open road, I'd expect the to see the engine to run at around 85°C - 90°C; on the weekend, it was more like 95°C to 103°C, with the fan cutting in I drop below 50mph and the engine temperature rises. I suspect that the engine thermostat is buggered, as opposed a faulty fan/radiator thermostat.
I'll attempt to get the thing out over the next few evenings, but does anyone have thoughts on this issue?
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Post by mekon on Jul 19, 2021 15:34:30 GMT
Buy an old air cooled Yam?
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Post by neilf on Jul 19, 2021 17:05:53 GMT
Buy an old air cooled Yam? I used to quite like the FZ600 😉 |
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Post by armstrongracer on Jul 19, 2021 17:39:29 GMT
Its summer, do you need a thermostat. Take it out & see how she runs.
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Post by Diego the toe clipper on Jul 21, 2021 13:55:10 GMT
You mentioned before that your bie had lost some coolant (hence suspecting a porous rad), but is it possible that the lost coolant has found its way into the oil via a failed head gasket?
Try the thermostat route first for sure, but I've never heard of thermostat problems on these bikes, HG failures on the other hand are known of, although not common.
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