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Mazda MX-5 Miata (2005 and earlier)

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What is this discussion about? Mazda, Toyota MR2 Spyder, Mazda MX-5 Miata, Convertible

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#4304 of 4340 82K mi on '04 Miata MazdaSpeed - Timing Belt question by toydriver1 May 11, 2008 (6:32 pm)
I'm wondering how many miles (over and above the 60K recommended by mfg) owners have driven their Miata's prior to changing the timing belt ? Can someone expect to get 90K miles on the original tb ?   I recently bought this one owner commuter car from the dealership that sold it originally. They told me that "all required maintenance had been done". Since then I have found that the timing belt has never been changed ( 82K mi on the odo now ). The car has otherwise been cared for with maintenance records showing everything else having been done. ( The owner obviously traded the car prior to doing the expensive timing belt ) I have been keeping the RPMs relatively low ( below 4500 ), but I do realize that I need to change out the TB soon. Replies to this message: ateixeira (May 12, 2008 8:35 am) tsotsi (May 19, 2008 7:46 am) ateixeira (May 19, 2008 7:59 am)
#4305 of 4340 Re: 82K mi on '04 Miata MazdaSpeed - Timing Belt question [toydriver1] by ateixeira May 12, 2008 (8:35 am)
Replying to: toydriver1 (May 11, 2008 6:32 pm) I just had mine changed this weekend. I was overdue - 76k miles.   They used a whole timing belt kit and did the water pump, too.   The job got a bit pricey but it's the first major expense I've had in 8 years, so I can't complain.   On a bum note, I had my timing advanced to 14 degrees BTDC, and they set it back to stock 10 degrees. Would you believe I feel the difference?   I gotta find those old instructions so I can advance the timing again.
#4306 of 4340 Re: 82K mi on '04 Miata MazdaSpeed - Timing Belt question [toydriver1] by tsotsi May 19, 2008 (7:46 am)
Replying to: toydriver1 (May 11, 2008 6:32 pm) I have the same problem with my '93 Miata. It has 60,000 mile on the clock and I only drive 3 or 4 thousand miles a year so I figure the belt might last until 2018, when the car will be 25 years old. I searched the internet and couldn't find a case of the belt failing in less than 90,000 miles . . . but age may also play a part.   If it fails before the rest of the car I will report on how many miles (or years) the belt actually lasted. I understand it is a non-interference engine so a broken belt won't trash the pistons and valves. Replies to this message: ateixeira (May 19, 2008 7:59 am)
#4307 of 4340 Re: 82K mi on '04 Miata MazdaSpeed - Timing Belt question [tsotsi] by ateixeira May 19, 2008 (7:59 am)
Replying to: tsotsi (May 19, 2008 7:46 am) Yeah, it won't do any harm but you may end up stranded.   I advanced the timing, and it fixed the power loss issue.   They had it set to 1 degree BTDC, it's supposed to be 10 degrees!   I advanced it more than stock to 14 degrees. Runs like a champ now.
#4308 of 4340 RX-7 engine swap by lsa_1977 Jun 26, 2008 (12:28 pm)
Due to the fact that my '99 miata's engine has died to the point of a rebuild, I have opted to install an R1 engine and transmission into it. However, I do not have the resources or the time. Does anyone know of a shop who could do this in the Alabama area. I'm willing to travel to Georgia and Florida.   Lisa Replies to this message: chrisa222 (Jun 27, 2008 5:26 am) lsa_1977 (Jun 27, 2008 9:42 am) tsotsi (Jul 03, 2008 3:55 pm)
#4309 of 4340 Re: RX-7 engine swap [lsa_1977] by chrisa222 Jun 27, 2008 (5:26 am)
Replying to: lsa_1977 (Jun 26, 2008 12:28 pm) Whats an RI engine?   You should go to www.miata.net, a lot more readers there that know a lot about their cars. Replies to this message: lsa_1977 (Jun 27, 2008 9:42 am) tsotsi (Jul 03, 2008 3:55 pm)
#4310 of 4340 Re: RX-7 engine swap [chrisa222] by lsa_1977 Jun 27, 2008 (9:42 am)
Replying to: chrisa222 (Jun 27, 2008 5:26 am) reading my post, I guess it was a little confusing. I was talking about the engine out of an RX-7 R1, which is the model type. kind of like you have your gt's, r/t's and slt's. It's a twin turbo on '93 models. Replies to this message: tsotsi (Jul 03, 2008 3:55 pm)
#4311 of 4340 Re: RX-7 engine swap [lsa_1977] by tsotsi Jul 03, 2008 (3:55 pm)
Replying to: lsa_1977 (Jun 27, 2008 9:42 am) I googled "rotary engine Miata" a year or so ago and got a lot of information about a few attempts at doing what you are thinking about.
#4312 of 4340 Oil Pressure by lbound Jul 20, 2008 (10:10 am)
I have a 1990 MX5 with a new engine. 2500 miles. The oil pressure guage does not show oil pressure till about 2000 rpm then at best only slightly. I know it must be better or I would have motor problem by now. Previous owner installed new motor so I don't know much about the work done. Car runs and performs well. Need a new sender? What should the pressure register? Loren Replies to this message: ateixeira (Jul 30, 2008 11:27 am)
#4313 of 4340 Re: Oil Pressure [lbound] by ateixeira Jul 30, 2008 (11:27 am)
Replying to: lbound (Jul 20, 2008 10:10 am) Well, the 1990-1994 models had real gauges that actually measure oil pressure, not just a dummy gauge like the later ones.   Mine reads low until I rev the engine, but not zero, just low. It jumps up when the engine revs, then stays pretty steady and increases slightly with high rpms.

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