Will REDEX do any damage ....

[grinder]

Right then peeps

i have a 1988 N/A RX7 2nd with about 114K on the clock with no sign of a rebuild

i have been thinking of running some REDEX thru it ( its a carb cleaner , injector cleaner , carbon cleaner ) etc...

will it do anything - or will it blow the engine ?

Any idea\'s on this

thanks

stu

[bnaellis]

Hi stu,
I tried something like that on my 2nd gen 1988 n/a  engine with approx 68,000 on the clock and I had problems starting it and it ran like a bucking bronco when it did start. I spoke to an rx7 garage at the time o fthis problem an dthey advised I might need an engine rebuild and should never do this again. Reason being these cleaners breakdown built up carbon and once dislodged where do they go ?? I can\'t remember as it was approx 7 yeras ago I think they mentioned stuff like it can jam in between apex seal and housing, block injectors and cause you to run lean etc etc which all ends up in needing an engine rebuild. Well you say did I need an engine rebuild ?? don\'t know I had booked it in to get looked at, and some muppet wrote it off a few days later.

regards

Brian Ellis

[grinder]

right then , thats redex out of the window !

is there anything i can use to clean my injectors with then

i dont think they need doing but with the milage - i would think they might

[djguru]

I don\'t know about the 2nd Gen and how it would be different to the 1st Gen, but there is heaps and heaps of mentions on the US rx7club 1st Gen forum regarding running ATF (auto trans fluid) thru the engine to de-carbonise it.
In essence, squirt it in, let it sit for a day or so, fire her up and watch the smoke!  Change plugs (keep the old ones for the next treatment) and away you go.
Now this is me just passing on the info; I haven\'t done it yet myself but will soon. There may be some truth in the dislodging carbon bits and pieces statement, but reading about the amount of people who have done the treatment, I\'m not too sure...

[grinder]

if the doubt is there - then i rather not !

[djguru]

Maybe the key is in allowing the time for the treatment to soften the carbon deposits before you start her up?
It probably comes down to how much you trust your rx7 mechanic to be giving you the right info!

[grinder]

hummmm i take these forums as my mechanic !

but as it stands i think i will leave it

the car runs A1 - but i wanted to be sure thats all

[bnaellis]

I don\'t believe injectors cost that much you could get new ones, If you are set on cleaning them, then maybe removing them and taking it to a local garage, they will probably soak them in something and use a pressure air blower to clean them out.

rgds

Brian

[djguru]

Check out this link if you want to try the treatment...

http://www.mazspeed.com/atf.htm

rgds

dave

[grinder]

has any one tried this on an engine that seems to run fine anyway

it doesnt seem that hard to do and reads like it works fine

should this be included as a routine maintenance step ?

thanks peeps for all your help so far

Stu.

[Glenn Butcher]

Hi Stu,  over the last week or so I have put some STP Injector cleaner in my brothers Cosmo which doesn\'t get a lot of use.  I also added some STP octane booster and two stroke mineral oil (1:100 ratio).  Along with running RON 97 or 98.

It is mainly because the engine is around 10 years old now, and as you may know a blocked injector can kill the engine over a short period of time.

Cleaning the injectors and having them flowed isn\'t a bad idea, it is the first thing we use to do when putting Turbo II engines into older model RX\'s.

I know Brian had a bad experience with doing this - and I\'m sure the potential is there for it to happen, but cleaner injectors are better than dirty.

Best way to combat carbon lock is to take it to the redline each time you drive it, I did a thread on Carbon Lock a while ago here: http://www.mazdarotaryclub.com/forums/showthread.php?threadid=125&referrerid=1  will give you an idea of the problem.


Don\'t know if it answers the question or just confuses you

[grinder]

err thanks glen - you have confused me now !

but the redline bit - is no probs - i red line it every time i go out - thats why i bought an RX7 !

[Ultraman_Cosmo]

I\'ve been chucking redex into Ro80 engines for years, but cant comment on fuel injected engines though.

[t2rew]

i have a turbo 2 and when i bought it, it ran quite lumpy. i put a bottle of injection cleaner in and it was much better. on a recent track day i used optimax fuel with octane booster and a very stronge mix of fully synthetic two stroke oil. my car still runs.

[grinder]

where does the injector cleaner go then

thanks

stu