well when my car hit 5k-5,800 it makes a weird noise like a loud humming n the shifter starts to vibrate A LOT, n it seems to hesitate a very small bit; it does it 1-3 gear haven't tried 4th or 5th n ill explain y; but the sec I hit 6k its stops n acts fine. when im in 4th at about 3,200 doing about 60 it makes a w ird almost like metal s raping metal noise f om the front of my car, only does it between 56-60mph stop at 61. now the reason I haven't tried 4th is because I haad a shop work on my water pump....needless to say it starts spewing anti-freeze all ova the place n my car got to about a tad b4 the b4 the H. so im bring it bak monday, but my question is what's making that noise? I t ink the tranny is going, but its like out of the blue. also about my car overheating should I make them inspect my engine 2 c if it got damaged?.

also I have a 9lb FW n a act 6 puck clutch
ps sorry if spelling bad im typing this on my phone.

 

should aslo add it never did it b4 untill I had them work on my water pump except 4 the metal s
arping sound

 

hey i had a shop put a water pump on my car...well ive blown it 3 time twice by my self once by them. My car seems to blow the gaskets on the pump. The tech said it seems like my engine is build up back pressure then blowing it out the water pump. My question is what would cause this?

 

A number of things:
-thermostat
-clogged hoses
-bad radiator

How long until it blows?
And if it take awhile, does the temp. read high or low?

 

I'm lost at what it could be man. Sorry

 

instant, the first time i was on the high way n it blew on there or sprung a leak then the tech ppl were testing a noise at 5,500 rpm n they said coolant flew into the air, then when i got the car bak they said it was fine i drove it n it was leaking...mind u i kept it under 4k. To answer ur question its a slowish leak now n it doesnt over heat drove it 30 miles after filling it and it didnt go past 1/4, n i was on the high way doing 90, but i know im outta coolant now. could b a hose or the radiator. Is there a test i can do to check the hoses. I no the radiator is original, it looks it.

 

Plugged up cooling system. The more it gets clogged, the higher the water pressure.

 

Bad water pump bearing. I saw your other post saying that you were blowing water pumps left and right, so it only follows that this one is wasted too. I had a similar vibration with a replacement water pump I bought from kragen. Switched it with a new one and the problem went away. Any imbalance in the water pump pulley will make the stock fan vibrate the whole car.

 

how would 1 unclog it? CAN I USE LIQUID DRANO?! hahaha j.k =P, but seriously how? n also how would i find out where its clogged?

 

Most likely the radiator, so you could unhook the inlet and outlet and stick a garden hose in one side. If it's plugged up, the water should have trouble flowing back out.

In the future, using distilled or purified water to mix 50/50 will prevent mineral deposits from building up inside the cooling system.

 

oo ya i no. when i bought the car bak in April it had sat for like 5-6 years im thinking that was the cause. after that i put 50/50 in untill i sprung a leak in a hose n was using water for a few weeks cause id have to fill it up every time i drove. Well if its plugged how do i unplug it?

 

ill talk to my tech n ask them if they changed te water pump 2 or just the gaskets. Im gonna bring it bak to them monday or tuesday when i get some more info, because mo 1 knew what the issue is. In my area theres no ppl that no about rx7's. I told them it had to do with the water pump because the issue didnt happen till they put it on n there naaa the cars just old. Then they said this n i knew they didn't no nothing about the car. They said y are u going above 4,000 rpms any way. I didn't answer i just kinda blankly looked at them...lol


Could the bad water pimp bearing also cause the pump to blow?

 

Doubtful. The gaskets are blowing because there's too much pressure on them. It's more likely that the pressure is causing the bearing to fail than the other way around.

It sounds like the mechanics working on your car are a bunch of retards. Take it somewhere else or start teaching yourself how to fix the car. It's practically a requirement for a car that's 20+ years old and has a motor that 99% of mechanics are ignorant about.

 

Yeah, that 5-6 years probably did it.

Purple Ice is a greay way to help with deposits too.
If you find the radiator is clogged, if you are short on cash for a new one, buy some radiator cleaner (from autozone, advance, etc.) and flush it through.
I've never used rad cleaner so I'm not sure how it will work.

 

ok kool, ive never done a rad. flushing, so i dont really no what to do. ill aks my dad tho he's probably know....he's done it o his bmw's so im guessing its all the same

 

ya..i would but theres no 1 around here....i no ppl thatr friends bu i cant pay them with a credit car...lol

 

ok did the flush nothing showed up... so how do i find this "clog"? im stressing because the shop said they only fix it one more for free....so i need help ppl!!..lol

 

if the rad is free flowing, then you need to check the rest of the system. I've done this with my truck, but I'm not sure how well it would work on the RX.

I took out my thermostat (check that too), and then pumped water through my top inlet pipe (the one that comes from rad to engine), and wait to see if water will come out the bottom pipe. It took about 10 min or so since I was using a waterhose.
You could try that , but again I'm not sure how well it would work.

If water doesn't come out and just overflows from the top pipe, then the internal system is clogged.

 

well if the internal system is clogged then how would i unclog it? you have giving the the how to to find the issues but not to fix them


What else could the issue b if there isnt a clog?

 

Im gonna start a new thread since we figured out the water pump issue.

 

Hey guys, im having issues with alot of pressure building up n blowing my water pump. I know the issue might b a clog, i no how to check for a clog but what i dont know is how to get rid of the clog. Also besides a clog what else can cause back pressure in a coolant system to make it blow the water pump? some things to add, my car doesn't overheat, it only starts to overheat when the coolant is running low from it pouring out near the water pump, i did a flush it came out all green, no brown black yellow.. etc, also its pouring out form the back of the water pump out of a small hose, idk what that is exactly i cant really c it. Here r my other posts that talk about some other water pump related issues i was having.

https://www.rx7club.com/showthread.p...07273&posted=1

https://www.rx7club.com/showthread.p...22#post8712122

 

#1 Multiple threads on the same thing merged. Only start one thread per subject per member.

#2 And your bumps have been deleted. Bumps are forbidden here in the 2nd gen technical section. Why do you think your posts are more important than anyone else that you bumped?

#3 And, do you know how the coolant system gets pressurized??? I guess not.

It gets pressurized by the WATER PUMP. So the water pump can not over pressurize itself and blow itself up. You could run it at 10,000 rpm and not blow itself up. Then toss in the pressure cap on the radiator or the filler (depending on what series and model) lets out any pressure at above the pre-set limit (usually just under 1 bar). That limit way way below what the seal is designed for. If there was really too much pressure it would be filling the overflow container. Is the overflow container over filling?

The cooling system on a rotary engine is almost exactly the same as a piston engine. Fundamentally there are not any sort of major differences at all. All automotive cooling systems pretty much work the same exact way, regardless of it is a piston engine or a rotary engine. If your mechanic can't figure it out he should not be working on any cars at all...

So why are you thinking that the cooling system is over-pressurizing?

If the water pump is leaking, it is bad. Either the impeller or the seal for it is bad. If you have been overtightened the belt you can waste the bearing and then the impeller. What deflection is the belt being set for??? Should be around 1/2 inch. If it is gaskets that are blowing, are you sure the housing and water pump are not warped and are being tightened down to the proper torque (with a torque wrench to check)?

And what small hose are you talking about on the water pump? Perhaps you mean the water pump's housing??? if so again what small hose? All the hoses on the housing should be hooked up. Or do you mean the weep hole on the water pump itself???

 

if you are this clueless about this car and arnt rich the only advice i can give you is to sell it. my 87 turbo II hasnt ran in 3 years and i had to pull the engine and get it rebuilt. all the lines and internals of the coolant system were pretty dried up and clogged, and that was only after 3 years... so how ur engine even runs after sitting for 5/6 years i have no idea.

 

i also had lots of deposits in the coolant jackets when i took my motor apart. if you have never had your engine rebuilt and since the car has been sitting neglected, most likely that is contributing to the excessive pressure. but you won't know for sure unless you check each part separately.

 

"If there was really too much pressure it would be filling the overflow container. Is the overflow container over filling?"

no its not over filling. The tech said and i quote "when we were reving it to 5,500rpms coolant shot up into the air from the water pump" he said it complete blew the housing n all the gaskets.



"If the water pump is leaking, it is bad. Either the impeller or the seal for it is bad. If you have been overtightened the belt you can waste the bearing and then the impeller. What deflection is the belt being set for??? Should be around 1/2 inch. If it is gaskets that are blowing, are you sure the housing and water pump are not warped and are being tightened down to the proper torque (with a torque wrench to check)?"


idk about any of that i had the shop change it.

"And what small hose are you talking about on the water pump? Perhaps you mean the water pump's housing??? if so again what small hose? All the hoses on the housing should be hooked up. Or do you mean the weep hole on the water pump itself???"


im not sure exactly i cant really c it but if ur looking at the engine in the area of the water pump maybe 4-5 inches its looks to b a small black hose because i seen a clamp n it looked brand new and the water was streaming from there.



"if you are this clueless about this car and arnt rich the only advice i can give you is to sell it. my 87 turbo II hasnt ran in 3 years and i had to pull the engine and get it rebuilt. all the lines and internals of the coolant system were pretty dried up and clogged, and that was only after 3 years... so how ur engine even runs after sitting for 5/6 years i have no idea."



i am clueless but im slowly learning and the guy said he got it up and running from the sit he also said he had the engine rebuilt n hada new radiator installed...but who really does a rebuild n keeps original hoses n clamps?


"i also had lots of deposits in the coolant jackets when i took my motor apart. if you have never had your engine rebuilt and since the car has been sitting neglected, most likely that is contributing to the excessive pressure. but you won't know for sure unless you check each part separately."



see id do that but i dont have the tools nor a garage that i can use, my dad has all that stuff but i can use it cause its his stuff =\. Is there any ways to get rid of the deposits with out taking anything apart?