I fixed my hot start! ! Fix your rx8 for under £5
Hi guys.
This is my first post. After getting my first Rx-8 and having problems with the hot start I tried everything. New plugs, leads, coil packs, trying the AT fluid trick and nothing working. I almost gave up. I went on the look out for a fast starter motor. As the a bit expensive I thought I'd have a look at mine and see if I can liven it up a bit with some WD-40 It's easy to take apart. Disconnect the battery, 3 bolts to get it off ( easy to get to) then there are 2 screws at the top and 2 bolts. The top will come off with the bushes, pull out the middle coil part but be carefull there is a ballbering on the bottom. Clean it all up with a bit of grease in the gears and the top. Once back together WD-40 in all the holes on the outside. Test it before you put it back on as it did not work well the first time for me, just needed a bit more WD-40. When your happy with it. Put it back on and you should be able to start it, even on low compression engines like mine. I think the problem with them is there position on the car. There are holes on the starter that I think are there to lube it up but they let water and grit inside. Hay, maybe I was lucky, but if this helps some one get there Rx back on the road let me know. Thanks. |
Originally Posted by cbmdj13b
(Post 4211719)
Hi guys.
When your happy with it. Put it back on and you should be able to start it, even on low compression engines like mine. |
Our cars only need a faster starter because our engines have lower compression when warm, failing engines may have it so low to make hot starts a problem.
I hope you only had a very worn starter... otherwise a rebuild is next on the list given what you say about having "low compression". Starters don't fix hot start problems, they only band-aids to cover huge bullet holes. |
My car starts now when warm! It means I can use it.
Like I said if it helps people use there car instead of just looking at them in the drive it helps rite? If it means I can use it for another 6 months or so I'm happy. |
Not always true! i see a lot of cars with hot start problems that are can be completly atributed to a slow starter! if cranking speed drops below 220 rpm (and ive seen older cars cranking as low as 150 :eek:) even a fairly healthy engine will struggle to start warm! ... the fix that this post is about is always what i try first before having a customer spend £300+ on a new starter and i can confirm it will, more often than not get you by at least a little while!
another trick i find helps is if you remove the earth bracket on the near side of the engine (earth for the starter loom next to the coolant drain plug) and give it a good clean up with a wire wheel or similar (they get a bit crappy) the better earth will help speed up your old starter :yesnod: word of caution when dismantling your starter, the 2 long thin bolts sometimes dont wanna be moved BE VERY CAREFULL, if they feel iffy they probably are and if you try force them they WILL snap, so worth hitting them with the wd and winding them in and out till your happy before you go diving into the starter :) oh and the early starters never ever crank faster than 250 rpm so dont expect to get a cheep R3 starter with abit of wd40 ... if your engine is that ill you need 300 rpm to start it just get a rebuild before you do more damage :yesnod: :cool: |
Thanks for that info. I also put a big earth cable going strate from the battery to the starter. My next idia was to put a second battery in the boot but I don't think these things would help a grate deal.
I'm also not staying this will solve every ones hot start problems as I know coil packs are also a big problem along with engine compression. Please can some one having problems try this and let me know how you get on? Thanks benedunn !! |
no problem ... im a noob on this site 2 :naughty:
anyway, IMO coils dont generally cause hot start problems ... tho they do cause start problems, running problems, fuel wash problems and inturn low compression problems ... so i guess indirectly they can cause hot start problems haha hot start problems are normaly caused by dying batterys (which cause cold start problems too obviously), slow starters or general low compression, refurbing an early S1 starter wont really help a low comp engine a great deal, not in the same way putting an uprated starter on would anyway ;) but it will/ could help a healthy engine struggling with an unhealthy starter if you look at mazdas comp graph it becomes a little more clear the relation between starting and cranking speed: note mazda state that the minimum the renisis needs to start it 6.9 kgf/cm2 - this is a little harsh and they do start a lot lower than that but the further below that line on the graph the worse hot start problems will become all this has probably been gone over 1000000000 times already but since im new here i dont mind writing it out :smoker: edit: forgot graph haha |
ok whos removed my 'add photos' thingy :yelrotflm
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I don't think so. I spent ages looking on the net for a solution. If it was any other engine I would have said crank sensor. To be honest I was looking forward to re building my 13b.
I also spent ages pushing the rotor tips in and out threw the spark plug hole because people said the drop in compression could be due to the apex seals getting stuck in. It's nice to speak to a guy who knows there stuff for a change. I'm just over the moon I can use my car over the summer. .. I hope. |
Originally Posted by cbmdj13b
(Post 4211908)
To be honest I was looking forward to re building my 13b. .
Originally Posted by cbmdj13b
(Post 4211908)
I also spent ages pushing the rotor tips in and out threw the spark plug hole
Originally Posted by cbmdj13b
(Post 4211908)
because people said the drop in compression could be due to the apex seals getting stuck in.
Originally Posted by cbmdj13b
(Post 4211908)
It's nice to speak to a guy who knows there stuff for a change.
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No not a screwdriver 'twas a small socket on an extension. snap-on ones are quite smooth on the edge. WD-40 (again) and thick oil.
I'm going to get a knackerd 13b off eBay and do it. Iv been a mechanic most of my life but it done one yet but always wanted to. There is a rather "cool" guy on YouTube restoring an old Cosmo that has done some good videos I know the rx8 engine is different but I have learnt a lot from that. Oh btw, my gearbox is a bit crap. Wines in first and 6th. Will new oil sort it or is it gorn? |
Your talking about Arron Cake pal :)
ye try redline or i use millers race stuff - you need 75w-90, 5l will be enough to do the diff too less if you have a 231 you have a PM by the way :rolleyes: |
Arron cake rules! and has the best website.
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I can appreciate your enthusiasm, but this doesn't really qualify as a DIY thread IMHO. So it has been moved to the Tech Garage forum area instead.
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Nice job man! mine was cranking really slow as of lately, and i checked the batter, alternator, and starter. They all checked out good, but when i hooked up my Cobb to check the starter Voltage its only cranking at 160-172, and manages to fire the car up once it reaches 198-203 rpms, but it stays at 160 rpms for a good 4 seconds.
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A little hope :)
hey am pretty new to this website and verry new to my RX8,
i bought it about 2 monts ago now and it is really starting to strugle to hot start now (even had to bump it the other day) have been reading so much on the web which tbh is a little confuzing with every one saying something a bit differnt but it really seems like you know what your talking about and I could do with some advise. my car is a 2004 231BHP 72,500miles RX8 and I love it but im 19 and still in collage and can barly aford the petrol let alown an engine rebuild (which it seems i might need? ) i have not done a compression test yet as there is no mazda garage within a 100 miles of me it seems. (live in cornwall, england). basically i have two people looking to buy it but do not want to sell them a broken car as i was. so would cleaning / replacing my stating motor with an uprated one, and mayby a new battery and coil packs mask the problem enough for me to sell it? (with a good enough consience but a slightly lighter wallet) Or my other option would be to rebuild the engin my self! i am not a qualified mechanic (but know quite a few) and i do know a think or to about car engines and am a good reasercher (not speller tho haha) how hard is it acctually to do and do i need to? sorry for massive message just really need some answers cheers :) |
Another broke college student?
Sell the car and take public transportation, its for your own good |
You still should do a compression test to see what is really going on. Gonna be cheaper than replacing heaps of shit which isnt your problem
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Originally Posted by Ronan
(Post 4537131)
so would cleaning / replacing my stating motor with an uprated one, and mayby a new battery and coil packs mask the problem enough for me to sell it? (with a good enough consience but a slightly lighter wallet)
) https://www.rx8club.com/series-i-tro...ck-out-207244/ |
just sell your car man ... I mean it.
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Originally Posted by nycgps
(Post 4538212)
just sell your car man ... I mean it.
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damn, u're right, ok, sell it ASAP PLZ !
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hot problems
hi people, im having some problems starting my car when its hot. iv herd the 2kw starter is the best way to go but I cant get my hands on 1 is there any1 on here that can help me out please
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https://www.rx8club.com/new-member-f...causes-249529/
Starting Trouble
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Okay i really need help. Can someone please text me 12627480304. Serious only. My rx8 i just bought. Well it has to cool or else it wont start? I need it to start hot? I heard something about new ignition coils. Please just someone text me when they can im in the dark on rotary motors. -.-
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