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i think my engine has blown

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Old Dec 7, 2005 | 10:19 AM
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rx7philrx7
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From: derby england
Question i think my engine has blown can anyone tell me?

i was driving my 7 today a bit hard when it started to run very bobbely like a few leads were off. my turbo metre was going up slowly but very erratticly, i only just got home, there is a weired smell and it wont rev smoothly, and now i try to start it, it sounds very deep and it doesnt start, do you think it has blown.

Last edited by c.stenson1; Dec 7, 2005 at 10:41 AM.
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Old Dec 7, 2005 | 11:07 AM
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rx7philrx7
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From: derby england
if the tips have gone what would it run like, also are the tips of the rotors called the apex seal or is that something else.
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Old Dec 7, 2005 | 11:46 AM
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From: In A Disfunctional World
First check the plugs and ignition to rule out their failure. Make sure all plugs are getting sparks.
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Old Dec 7, 2005 | 11:50 AM
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rx7philrx7
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From: derby england
i will do that tomorrow its dark now in the uk, would the plugs or leads make the turbo metre flutter.
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Old Dec 7, 2005 | 11:54 AM
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Check the boost sensor vacuum line near the firewall. Mine pops off like once every couple months and every time it happens I'm like oh **** I have just blown my engine. I think I am going to super glue those bitches on there. But when that line comes off the car has all the symptoms you are describing including lots of smoke, rough idle, and no power.
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Old Dec 7, 2005 | 11:57 AM
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rx7philrx7
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From: derby england
ill take a look at that now, where is that sensor, is it the map one.
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Old Dec 7, 2005 | 12:02 PM
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Originally Posted by c.stenson1
ill take a look at that now, where is that sensor, is it the map one.
Yes, it's the MAP (BOOST) sensor which is on the firewall (unless you relocated it).
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Old Dec 7, 2005 | 12:05 PM
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Originally Posted by D4rw1n
Check the boost sensor vacuum line near the firewall. Mine pops off like once every couple months and every time it happens I'm like oh **** I have just blown my engine. I think I am going to super glue those bitches on there. But when that line comes off the car has all the symptoms you are describing including lots of smoke, rough idle, and no power.

dude zip tie it
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Old Dec 7, 2005 | 12:07 PM
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rx7philrx7
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From: derby england
just looked its not that, what would it run like if the tips have gone.
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Old Dec 7, 2005 | 12:12 PM
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Originally Posted by c.stenson1
just looked its not that, what would it run like if the tips have gone.
The ends of the rotors are where the apex seals are. If you are asking what it would run like with missing/broken apex seal, it will run really bad to not starting at all. However, there are other problems which can have similar symtoms.

If you have access to a compression tester, I would do that first. Just in case you did blow the engine, there is no sense in spending days looking over stuff that won't matter.

If the compression is ok, then start looking at other possible causes.
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Old Dec 7, 2005 | 12:19 PM
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rx7philrx7
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From: derby england
thanks i will do the compression test tomorrow, i looked all over the engine bay and there isnt any obviose things like vaccum pipes or plugs off, i think the worst has happened as it wont start either. i noticed there was a bit of a knock ive never heard before in the engine when i limped home aswell, which could be a missing bit of tip, ill do that tomorrow and see what is what, cheers guys.
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Old Dec 7, 2005 | 12:28 PM
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www.rotaryresurrection.com ---> tech ---> compression check
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Old Dec 7, 2005 | 12:32 PM
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Jason
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Yeah i do have them zip tied and they still pop off. ITS SUPER GLUE TIME!!
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Old Dec 7, 2005 | 12:35 PM
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rx7philrx7
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From: derby england
just had a thought how can i get a true reading from the compression test if its not warm.
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Old Dec 7, 2005 | 12:57 PM
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Originally Posted by c.stenson1
just had a thought how can i get a true reading from the compression test if its not warm.

You don't need a "true" reading. The "ballpark" reading will give you the information that you need.
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Old Dec 7, 2005 | 02:20 PM
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Hum could be the motor. When you say it's a weird smell from the motor, has there been any raditor coolent leaking out of it? Just wandering because sometimes when a coolent seal is going out. It can have a sweet kind of smell and hard to start up.
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Old Dec 7, 2005 | 02:29 PM
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For heavens sake, take the car to a rotary specialist before you make it worse...

This probably ISN'T the best time to learn how your car works...
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Old Dec 7, 2005 | 02:48 PM
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rx7philrx7
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From: derby england
it smells of oil i think, ill do the checks tomorrow and report back, the little knocking is a bit of a clue, i fear the worst.
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Old Dec 8, 2005 | 10:35 AM
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rx7philrx7
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From: derby england
it is what i thought, there isnt any compression in the front chamber, i dont know if to fix it or get rid cheap as i dont really have the time to repare it, or i dont have the funds to send it in to get repared, does anyone on here sell the apex kit.
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Old Dec 8, 2005 | 10:51 AM
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There is no such thing as a cheap fix, and replacing just the apex seals is not a long lasting solution. If you really can't afford a reman or a quality rebuild, it's probably best to sell it as-is and subtract the cost of the engine from the selling price.

Dave
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Old Dec 8, 2005 | 11:01 AM
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rx7philrx7
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From: derby england
i will sell it i have no time, thanks.
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Old Dec 8, 2005 | 11:04 AM
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From: Gaithersburg, MD / WVU
Originally Posted by c.stenson1
i will sell it i have no time, thanks.

sorry to hear that, this though is why we try to warn potential owners of these cars on this board. Sometimes we get ridiculed for telling people the car is not for them, but then again were just trying to help people not end up in your position (the same position i was in 2 years ago) I guess some people have to learn firsthand tho.

good luck with your sale.
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Old Dec 8, 2005 | 04:04 PM
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Dude,
i will buy that engine off you for $100 but i will want you to take some pictures first so i can see how bad you screwed her up. i left you some pointers on replacing your seals in your other thred. how did you check your compression? did you bring it to a shop? you might not be as bad as you think if you got lucky you could hav just heated up the engine and the springs on the apex seals which are tempered steel could have been heated to the point they are not pushing the seal up and you are loosing compression. Like i said good luck with it if you need to go all out you should be able to get a new engine in her for around 2500 and it will be a good one too. there a a bunch of good shops you can do it yourself for around 1200 and that can include a street port and all new seals. it all depends on how much love you have for her. again
Best of luck let me know if you want to part her out i would get some stuff from you
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Old Dec 8, 2005 | 04:35 PM
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Originally Posted by Harold93
Dude,
i will buy that engine off you for $100
lol, if the rear compression is decent; one decent rotor or housing is worth more than $100. Even good side housings would be worth more than $100 each.
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Old Dec 8, 2005 | 07:07 PM
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Originally Posted by D4rw1n
Check the boost sensor vacuum line near the firewall. Mine pops off like once every couple months and every time it happens I'm like oh **** I have just blown my engine. I think I am going to super glue those bitches on there. But when that line comes off the car has all the symptoms you are describing including lots of smoke, rough idle, and no power.
happened to me once lol i was like are u ******* kidding me i was so pissed but then it was all good **** that scares you though
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