CanadianRX7

Well when i was doing my 1/4 i decided to keep it in 3rd gear for the end and i ended up redlining it for about a second..once i shut er down my engine/fan/belts sounded very loud...was the belt spinning soo fast that it slipped?? it still sounds very bad and it makes a weird noise when i start the car up...it sounds like its the belt on the driver side..i havent got to look at it in the daylight yet though..also should i get this fixed asap? or can i hold out a little bit longer?

SonicRaT

iTrader: (6)

As with any problem, get it fixed as soon as you can, don't want it to turn into bigger problems now do you? Which belt do you think it is? I don't think redlining for a little while would cause damage, I've done it many many times in my old NA, and that had stock belts in it! I'd suggest just checking them in the morning and see which it is (if it even is the belt) Good luck with your findings

ZachSpazz

Maybe you goofed up the PS pump or AC compressor and they're now dragging on the belts a little?

DaleClark

iTrader: (55)

Hitting redline is not a problem at all - heck, it's recommended .

Get a can of belt dressing and spray it on your belts and see if the noise goes away - if it does, you've probably just got a slipping belt that could stand to be replaced. No biggie at all. But, worth checking into.

Dale

dre_2ooo

Make sure your belts are TIGHT ENOUGH!

Cheers!

don't use dressing it will shorten belt life

Rotorific

iTrader: (1)

make sure your belts are tightened and from your engine bay rev the engine to locate the noise if its a long noise its your belt but if it is "chirping" it could be your alternator i have the same problem we were going 110 for a while on an expressway so eh

Pinfield357

my alternater belt shreded itself apart once when i was redlineing my motor like that

DaleClark

iTrader: (55)

Uh....yeah.

You don't want to put it on EVERY DAY, but to diagnose a squeaky belt it works great.

BTW, use only quality belts - I use Dayco belts from Pep Boys. They're top quality - cheap belts WILL bite you in the long run. I've also heard good things about the Goodyear belts that some other stores are carrying, but I have no first-hand experience.

Dale

CanadianRX7

i will go check it out in 30 mins here...i didnt just redline the car..i kept it redlined for a second or two..one more question...is the stock fan really shitty?? my temp when running on a hot day idling in 100 weather is the same as when i run at full running temp during winter...so i was wondering why everyone is changing their fans?? is it because your cars are modded and get way hotter then a stock engine??

Sniper_X

Water works to diagnose a squeaky belt.

Spray it on... no noise.

And its free.

CanadianRX7

well i THINK my belts are fine...i think the noise is coming from the small spindal that the belt rotates on..when i grab it and jerk it side to side it makes a small noise and it has a little bit of play in it..My not sure what the belt is for but its the upper one on the driver side..

So what excactly do u do with the water???i havent played with my engine at all...i know quite a bit just not a whole lot mechanical..

DaleClark

iTrader: (55)

Hitting redline won't damage the engine at all - neither will bouncing off the rev limiter. Hell, I've hit 9800 RPM before on accident, and the engine could care less . Not a good general practice, but that's one good thing about a rotary - if that was a piston engine, that would have floated some valves!

The stock clutch-driven fan with shroud is really darn good - it takes a heckuva electric fan to compare. The downside to the clutch driven fan is it and the shroud is large and bulky, and always gets in the way.

Dale

CanadianRX7

does some one else beside this guy have anything to say...bouncing of rev limiter wont to anything newbie dont go telling people information that isnt true..

zub

Once ran my NA '86 for about 20-30 seconds at redline in 4th.......achieving top speed for that car with no detrimental effects other than slight burning of belts

Will generally hit redline 3-4 times a day in all 3 of the rx7's that I've owned.....of those

1st is an NA 86........150,000 miles and still running real strong.
2nd is another NA 86 165,000 miles (65k on rebuild) autocrossed for past year....no problems
3rd is '89 T-II which I'm still getting up to form...

I believe the standard literature I've seen says that internal damage to engine starts to occur at 8000 RPM when stationary gears start to deform.

have you not seen the tag "A redline a day keeps the mechanic away."

No worries......I like the sound the buzzer makes

zub

Ryde _Or_Die

No he is right, I mean after modding your car some your powerband moves up and most people go past redline. I've taken my old NA to 8000+ a few times and 7500 on my T2. On the drivers side there is the power steering pump and the AC. I believe thats all. Now you can prolly just tighten you belts up to fix the problem. What kind of noise is it, constant or ":tick:...:tick:...:tick:..."? Hell you can just take off the ac belt and see if that stops it. If not take of the power steering belt and see if that does it.

CanadianRX7

i think its just a loose pully because i could move it with my hand side to side but i couldnt move the others..i

know redline is good for our cars but going over redline does hurt the engine and its components..if it didnt the redline would be higher outta the factory...rev limiter is like 9000 grand isnt it?? at that high of rpm on a stock engine there would be lots of heat and it could lead to many problems...By saying he hit 9800 rpms and the engine couldnt care less if totally false for a engine with stock internals...

ps just because u make power up that high does mean its safe to run with a high rpm, unless u have internal mods as well as cooling mods..8000 rpms or so like ride or die mentioned would be fine though but running at 9800 wouldnt

Aaron Cake

iTrader: (1)

Let's all get something straight here. The pully you are talking about connects directly to the eccentric shaft. If you can move it any appreciable amount, you have a big problem. Perhaps you killed the front bearing....How much movement are we talking here?

Hitting redline and running at it for a while is not a problem, and won't cause damage to a properly running rotary.

Overrevving causes all kinds of problem. Perhaps the worst is eccentric shaft flex, which causes the engine to run out of tolerance and makes it possible for the rotor tips to impact the side housing. This is BAD. Redlines are there for a reason. Obey them unless you have modded your engine to specifically raise the redline.

Ryde _Or_Die

He said it was on the drivers-side of the engine. I'm thinking its an accessory pulley, not the main one in the center. Am I understanding it right canadian?

Aaron Cake

iTrader: (1)

OK, if it's a belt on the drivers side, which one? A/C or PS? Remove the belts and wiggle both pullies. Whichever one has excessive play is the problem.

CanadianRX7

yea its the upper one on the drivers side which i think is the a/c right?? if thats it i will just take the belt offf