Rear Coolant nipple plastic ?
10-23-13, 01:36 PM
#6
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its B455-61-240A in case anyone is interested.
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10-23-13, 05:47 PM
#9
RX-7 Bad Ass
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Oh lord.
OK, a little history lesson. The FC had a metal nipple on the back of the block that the heater hose attached to. Ask any FC guy if he's had that hose blow, they go out ALL the time. Why? Oil gets dripped on the hose while changing the oil, it weakens the hose, it blows.
On the FD, Mazda put in that plastic quick-connect. Not really sure why they did it, but one thing it DOES do is reduce the amount of oil that gets on the hose during an oil change. Heater hose failures are FAR and away less of a problem on the FD.
So, PLEASE use that plastic quick connect. Reasons why -
- It helps keep oil away from the hose
- It's a proper sized nipple with proper hose barb for the heater hose
- It will last the life of the coolant hoses.
Clamping the hose onto the nipple is a poor idea. Biggest thing is the pipe is too small, so you have to crank down on the hose clamp to make it super tight so it doesn't leak. That crimps the hose down and drastically shortens hose life. Also, you can't use a spring type hose clamp, you have to use a worm drive clamp, and that cuts into the hose and also doesn't provide constant tension on the hose.
Please, guys, do it RIGHT.
Dale
OK, a little history lesson. The FC had a metal nipple on the back of the block that the heater hose attached to. Ask any FC guy if he's had that hose blow, they go out ALL the time. Why? Oil gets dripped on the hose while changing the oil, it weakens the hose, it blows.
On the FD, Mazda put in that plastic quick-connect. Not really sure why they did it, but one thing it DOES do is reduce the amount of oil that gets on the hose during an oil change. Heater hose failures are FAR and away less of a problem on the FD.
So, PLEASE use that plastic quick connect. Reasons why -
- It helps keep oil away from the hose
- It's a proper sized nipple with proper hose barb for the heater hose
- It will last the life of the coolant hoses.
Clamping the hose onto the nipple is a poor idea. Biggest thing is the pipe is too small, so you have to crank down on the hose clamp to make it super tight so it doesn't leak. That crimps the hose down and drastically shortens hose life. Also, you can't use a spring type hose clamp, you have to use a worm drive clamp, and that cuts into the hose and also doesn't provide constant tension on the hose.
Please, guys, do it RIGHT.
Dale
10-23-13, 06:02 PM
#10
I did fix it right IMO. I removed the plastic connector with an 'O' ring that's famous for failing about 5 years ago with two properly tightened quality worm-gear clamps...one on either side of the bump. Absolutely no issues.
I don't know anyone who's had a failure from hoses swelling from oil on an FD at that location. But I do know an owner (actually maybe two I'd have to ask), who've had that connector fail.
I don't know anyone who's had a failure from hoses swelling from oil on an FD at that location. But I do know an owner (actually maybe two I'd have to ask), who've had that connector fail.
10-25-13, 09:22 PM
#15
That is the weirdest thing. I went out and checked, of all five JDM engines I have, not one has that strange plastic thing on that nipple. Looked in my original JDM 1992 daily driver and it just uses a normal spring clamp too. Was this just a USA thing?
10-26-13, 02:51 PM
#16
Rotary Freak
No. ^^
Worm drive clamps, there are types that are lined, readily available - avoiding the digging in, although usual motor spare parts places carry the cheapest and nastiest varieties. From memory, the standard hose is a bit of a "**** in a sock" size wise, I think I've used 5/8 heater hose, but then again, no heater box to contend with here.
Worm drive clamps, there are types that are lined, readily available - avoiding the digging in, although usual motor spare parts places carry the cheapest and nastiest varieties. From memory, the standard hose is a bit of a "**** in a sock" size wise, I think I've used 5/8 heater hose, but then again, no heater box to contend with here.
10-26-13, 02:57 PM
#17
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the JDM parts catalog shows it *shrugs*
10-26-13, 07:23 PM
#18
I've imported RHD ones to Australia since 2004, and that is the first time I've seen that plastic thing.
In any case, spring clamp on my daily has given zero problems for years. That plastic doodad just looks like an extra failure point, but I may be wrong.
In any case, spring clamp on my daily has given zero problems for years. That plastic doodad just looks like an extra failure point, but I may be wrong.
