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rad cap
Apr 16, 2012 20:12:13 GMT 1
Post by r46jackhd on Apr 16, 2012 20:12:13 GMT 1
Where do i get radiator cap from for a 250 lc.
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rad cap
Apr 16, 2012 22:16:34 GMT 1
Post by Norbo on Apr 16, 2012 22:16:34 GMT 1
you can get them new but they are a lot of money , best id just ask for one second hand ttry onewhelisanough or redbimota on hear they have lots of second hand parts .
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rad cap
Apr 16, 2012 22:23:07 GMT 1
Post by r46jackhd on Apr 16, 2012 22:23:07 GMT 1
thank you. think mine is faulty, i have tried everything else but temp still getting hot.
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Post by cb250g5 on Apr 17, 2012 7:40:22 GMT 1
Take it to a motor factors - it's the same as many a Toyota one. 13lb if I remember correctly
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Post by Norbo on Apr 17, 2012 8:21:36 GMT 1
Now you menshon it i do recall hearing the same
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rad cap
Apr 17, 2012 12:35:32 GMT 1
Post by r46jackhd on Apr 17, 2012 12:35:32 GMT 1
Spot on, 0.9 bar equates to 13psi, could a faulty cap mean top hose hot, bottom hose stays cold, reservoir tank fills up too, temp gauge goes to near red.
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rad cap
Apr 17, 2012 13:09:03 GMT 1
Post by 47x on Apr 17, 2012 13:09:03 GMT 1
i think toyota mr2 mk 1 is the same as a lc one.but i could be wrong.i know that a toyota one DOES fit.
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rad cap
Apr 17, 2012 15:59:58 GMT 1
Post by johnlc on Apr 17, 2012 15:59:58 GMT 1
Cressida i think i have stainless one from ebay
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rad cap
Apr 17, 2012 16:22:21 GMT 1
Post by arrow on Apr 17, 2012 16:22:21 GMT 1
Spot on, 0.9 bar equates to 13psi, could a faulty cap mean top hose hot, bottom hose stays cold, reservoir tank fills up too, temp gauge goes to near red. Don't think so matey. Something else is wrong. Are you saying that the rad cap allows the coolant to overflow in the expansion tank ? Sounds more like a head gasket issue. |
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rad cap
Apr 17, 2012 17:11:29 GMT 1
Post by r46jackhd on Apr 17, 2012 17:11:29 GMT 1
Yes coolant going back to expansion tank. Head gasket done, new impela/water pump, checked no thermostat in there, flushed radiator, all flowing freely. Maybe its ok but seams hot to me.
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rad cap
Apr 17, 2012 17:14:51 GMT 1
Post by arrow on Apr 17, 2012 17:14:51 GMT 1
Try a small amount of rad weld. You will only need about 15mls. Try it and let us know how you get on. However, your problem seems like a leak from the combustion chamber to the coolant passage(s). Worth a try though. You may end up having to re-do the head gasket again.
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rad cap
Apr 17, 2012 17:30:13 GMT 1
Post by 47x on Apr 17, 2012 17:30:13 GMT 1
oh!that seems like the head gasket aint seated properly m8?did u use pattern or genuine?its pressurising the cooling system,imo.smell the coolant/rad.see if u can smell petrol/fumes.good luck!  |
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rad cap
Apr 17, 2012 17:53:13 GMT 1
Post by r46jackhd on Apr 17, 2012 17:53:13 GMT 1
pattern head gasket, ill have a smell. Temp gauge needle, is normal in the middle, 3 quarters, a quarter. Sounds to me ill be doing head gasket again.
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rad cap
Apr 17, 2012 18:08:28 GMT 1
Post by 47x on Apr 17, 2012 18:08:28 GMT 1
check EVERYTHING before you do.make sure there is no air lock,sounds silly,but many just fill and hope for the best,did you say the needle was in the red??
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rad cap
Apr 17, 2012 18:24:52 GMT 1
Post by r46jackhd on Apr 17, 2012 18:24:52 GMT 1
It was going to red but since I changed coolant at weekend after checking for thermostat it goes to 3 quarters, I've not had the bike long, chap before changed head gasket / new water pump to try n sort, I bought knowing temp goes high but thought this be easy to sort, helped to knock price down a bit. Seams strange to me that ticking over with RAD CAP OF after re-filling to get air out the top and bottom hose warm at same rate, when I go ride top hose gets hot and bottom is cold, maybe Luke warm.
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rad cap
Apr 17, 2012 18:41:15 GMT 1
Post by r46jackhd on Apr 17, 2012 18:41:15 GMT 1
This is gonna sound strange but I just gone to cold bike and taken cap of, it was like it were stuck then a gulp of air/liquid then it were free, that's odd.
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rad cap
Apr 17, 2012 18:43:24 GMT 1
Post by 47x on Apr 17, 2012 18:43:24 GMT 1
could be the cap,or faulty gauge.things like this are annoying!!did it smell like its cooking?
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rad cap
Apr 17, 2012 18:54:28 GMT 1
Post by r46jackhd on Apr 17, 2012 18:54:28 GMT 1
Cooking, no,something ain't right, gonna try cap first.
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rad cap
Apr 17, 2012 18:59:01 GMT 1
Post by 47x on Apr 17, 2012 18:59:01 GMT 1
sounds like cap to me m8,hope its that simple.good luck!!!!!
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rad cap
Apr 17, 2012 19:03:48 GMT 1
Post by r46jackhd on Apr 17, 2012 19:03:48 GMT 1
Yep cap first. If I change head gasket do I wanna be using genuine.
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rad cap
Apr 17, 2012 19:23:12 GMT 1
Post by Tone on Apr 17, 2012 19:23:12 GMT 1
Can you start it up from cold with the rad cap off and make sure your not getting any bubbles in the top of the rad. If so sounds like headgasket. Most car garages have a tool that fits in the top of the rad that is filled with a coloured liquid and the liquid changes colour if any combustion gasses are getting into the coolant system.
The idea of the expansion tank is as the coolant in the rad heats up and expands it blows out any excess through the rad cap and into the expansion tank. Then when the engine is stopped, the coolant in the rad cools down which creates a vacuum in the rad which draws coolant from the expansion tank back into the rad via the rad cap.
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rad cap
Apr 17, 2012 19:34:30 GMT 1
Post by r46jackhd on Apr 17, 2012 19:34:30 GMT 1
No bubbling, checked other day. What happens when a cap is faulty.
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webbo
Thrash Merchant
Posts: 393
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rad cap
Apr 21, 2012 19:29:47 GMT 1
Post by webbo on Apr 21, 2012 19:29:47 GMT 1
Does anyone have a link to the correct one on ebay? I bought one of ebay s/s suppose to be the right one from an MR2 but is way too small!
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rad cap
Apr 21, 2012 19:35:56 GMT 1
Post by oldelsieboy on Apr 21, 2012 19:35:56 GMT 1
Does anyone have a link to the correct one on ebay? I bought one of ebay s/s suppose to be the right one from an MR2 but is way too small! Check out THIS THREAD but make sure you read it ALL  OEB |
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webbo
Thrash Merchant
Posts: 393
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rad cap
Apr 21, 2012 19:43:32 GMT 1
Post by webbo on Apr 21, 2012 19:43:32 GMT 1
Thanks OEB, Just ordered the correct one, now I will have to buy a PV to fit my other rad cap ;D
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rad cap
May 20, 2012 19:14:16 GMT 1
Post by r46jackhd on May 20, 2012 19:14:16 GMT 1
Finally got head gasket done this weekend, genuine. Been for ride, still gets hot, needle to the red then backs of a little, expansion tank level still goes up?  ? |
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rad cap
May 20, 2012 19:39:21 GMT 1
Post by arrow on May 20, 2012 19:39:21 GMT 1
Suspect crack in head and/or barrels, did you try the radweld ?
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rad cap
May 20, 2012 20:09:55 GMT 1
Post by r46jackhd on May 20, 2012 20:09:55 GMT 1
.Didn't try rad weld no, thought I would do gasket first because I knew it was a patented one that was fitted. The barrels and head all looked OK, seams odd why goes all the way to red then cools a little, needle about 3 quareters, could i have air locks in there.
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rad cap
May 20, 2012 21:01:29 GMT 1
Post by flames on May 20, 2012 21:01:29 GMT 1
you wont always be able to see cracks in the head or barrels.
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rad cap
May 20, 2012 22:37:39 GMT 1
Post by 47x on May 20, 2012 22:37:39 GMT 1
i think its the temp gauge!!!!!although the lc mota gets hot,they run much cooler than,say,a valve,so go for a run and when the needle goes up into red,check the barrels/head,it shouldbe obviously hot,but not scalding,if its not REALLY hot,its the temp gauge.my m8 had a faulty one before.
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