please help quick with turbo questions/concerns
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please help quick with turbo questions/concerns
hey everyone, hows it going. i searched briefly but im in a rush and so far im not able to find any pics of what im looking for...so i appologize for posting cause i know this stuff has been covered...but please help me if you can cause i have only 1 day left to get everything put back together.
i pulled my turbos off today so i can get to the intake gasket to replace it...hopefully that will finally fix my idle. when i pulled the turbos off i noticed a ton of cracks in hte turbo manifold. the worst is on the thin piece of metal that separates the 2 chambers on i think the primary side. the crack extends through the whole piece and at parts i can see little bits missing and it doesnt look good. what is the circular plunger? is this the WG? anyway, whatever it is it is not sealed well at all.
i have to have the car finished by tomorow cause im taking a trip and its my only means of transportation right now....so i dont know what to do. i do have a spare motor/turbo... but it is in a car that had an engine fire so im not sure if its still useable (and i havent pulled it yet so i dont know the condition anyway)
would anyone have pics , or can describe a manifold that has cracks but is still useable...at what point is it no good?? thanks so much....sorry im in such a rush... just freaked out about time constraints!!!! -heath
i pulled my turbos off today so i can get to the intake gasket to replace it...hopefully that will finally fix my idle. when i pulled the turbos off i noticed a ton of cracks in hte turbo manifold. the worst is on the thin piece of metal that separates the 2 chambers on i think the primary side. the crack extends through the whole piece and at parts i can see little bits missing and it doesnt look good. what is the circular plunger? is this the WG? anyway, whatever it is it is not sealed well at all.
i have to have the car finished by tomorow cause im taking a trip and its my only means of transportation right now....so i dont know what to do. i do have a spare motor/turbo... but it is in a car that had an engine fire so im not sure if its still useable (and i havent pulled it yet so i dont know the condition anyway)
would anyone have pics , or can describe a manifold that has cracks but is still useable...at what point is it no good?? thanks so much....sorry im in such a rush... just freaked out about time constraints!!!! -heath
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Since there isn't anything you can do about it right now, and you need the car, put it back together. With the new gasket, it should run better than before.
I have heard many stories about turbos with varying stages of cracks. I think that most cars with over 50K have at least some minor cracks.
I have heard many stories about turbos with varying stages of cracks. I think that most cars with over 50K have at least some minor cracks.
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Originally posted by TireSmokin7
That goes through here. If so your turbo is shot. This turbo is on it way to the trash can.
That goes through here. If so your turbo is shot. This turbo is on it way to the trash can.
the car boosts and such but i dont know how well because i havent installed a boost gauge. the car "seems" fast, and i can definatly feel the turbos pulling but maybe ive never felt how its *really* supposed to drive =( .... is there anyway to swap exhaust housings or do i just get a new set of turbos?
last question is am i better off buying a used set off the forum or something... or is it just better to buy a brand new set? i have a feeling the motor only has another 10K at most on it so would it make sense to throw the old ones back in for now and then just do everything? i just came inside from pulling my other set of turbos from a car w/ an engine fire and the compressor housings are filled with sludge so they are out....
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ok i found this picture on the forum...mine are like this (a little less severe..but almost this bad)
if i can locate a good housing is it possible to rebuild and swap housings or should i just dish out the dough?
last question i promise (maybe ) what would these cracks do to performance.... basically, what are the cracks affecting right now (spoolup, max pressure, etc)?
if i can locate a good housing is it possible to rebuild and swap housings or should i just dish out the dough?
last question i promise (maybe ) what would these cracks do to performance.... basically, what are the cracks affecting right now (spoolup, max pressure, etc)?
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OK last one... these are basically how my turbos look...this was posted by Turbojeff:
"Here is a pic of some cracked turbos. They produce boost just fine, reinstalled about 5K miles ago, no problems."
"Here is a pic of some cracked turbos. They produce boost just fine, reinstalled about 5K miles ago, no problems."
#16
No it's not Turbo'd
I thought the bottom one was prespool controll and the top was the wastegate !??
And the plungers are the actuators that open the doors to divert exhaust flow...
And yes either improper shutdown, and or racing the car will do that to the manifold... but we're not talking once or twice a year on the track, most likely autocrossing several times a quarter....
And the plungers are the actuators that open the doors to divert exhaust flow...
And yes either improper shutdown, and or racing the car will do that to the manifold... but we're not talking once or twice a year on the track, most likely autocrossing several times a quarter....
Last edited by DCrosby; 12-16-03 at 11:24 AM.
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Originally posted by TireSmokin7
That goes through here. If so your turbo is shot. This turbo is on it way to the trash can.
That goes through here. If so your turbo is shot. This turbo is on it way to the trash can.
Dave
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thanks everyone!! ive decided that the sane thing to do is just throw them back in and enjoy everythng how it is untill the motor blows. what will happen then is up to my dad as it is his car. i currently have my own issues with rebuilding my FD... im just his inept mechanic
#19
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Originally posted by RotorMotor
OK last one... these are basically how my turbos look...this was posted by Turbojeff:
"Here is a pic of some cracked turbos. They produce boost just fine, reinstalled about 5K miles ago, no problems."
OK last one... these are basically how my turbos look...this was posted by Turbojeff:
"Here is a pic of some cracked turbos. They produce boost just fine, reinstalled about 5K miles ago, no problems."
The cracks don't really matter much at all although they generally show age. Those turbos only had 89K when that pic was taken.
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Originally posted by DCrosby
I thought the bottom one was prespool controll and the top was the wastegate !??
And the plungers are the actuators that open the doors to divert exhaust flow...
And yes either improper shutdown, and or racing the car will do that to the manifold... but we're not talking once or twice a year on the track, most likely autocrossing several times a quarter....
I thought the bottom one was prespool controll and the top was the wastegate !??
And the plungers are the actuators that open the doors to divert exhaust flow...
And yes either improper shutdown, and or racing the car will do that to the manifold... but we're not talking once or twice a year on the track, most likely autocrossing several times a quarter....
#21
No it's not Turbo'd
I would immagine that a glowing red hot turbo would crack, with the stress on a cold day if just turned off.. as opposed to letting it cool down gradually.... and I'm not argueing your point turbojeff just stating that cast iron, which is what I assume the manifolds are, is prone to heat stress... (Cracks)....
-DC
-DC
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Originally posted by turbojeff
Improper shutdown does not crack the manifold. Improper shutdown cokes the oil on the shaft that the compressor and exhaust turbine are connected with. The FDs turbos are not very prone to damage from improper shutdown. It has been my experience that the turbos outlast the engine. I have replaced over 20 motors but never a set of turbos.
Improper shutdown does not crack the manifold. Improper shutdown cokes the oil on the shaft that the compressor and exhaust turbine are connected with. The FDs turbos are not very prone to damage from improper shutdown. It has been my experience that the turbos outlast the engine. I have replaced over 20 motors but never a set of turbos.
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BTW just wanted to mention that i called ray @ malloy mazda...he said they go for $4200 and that he could do them for like $3K. thats still retardedly expensive but i dound out some interesting information that i wanted to share with everyone when i talked to ray. he tells me that he may be able to start ordering *JAPANESE* parts in a few months... he was not allowed to order japanese parts but i think he petitioned to do so or something. anyway, the 280HP j-spec turbos are the same price in japan so that means he will be able to get them for us for the same price as the US ones...as well as other j-spec parts. just thought id share, but this wont be for a few months at least so hold tight. if this actually ends up happening stores like jt-imports may become obsolete. -heath
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