No compression
12-05-11, 07:55 PM
#1
No compression
Alright, so i bought a used japanese motor for my rhd rx7, i put it in over the summer and it wasnt running right so i checked the compression. The compression was good in front but there was no compression in the rear rotor housing, so i decided to pull the motor and rip it apart. Today i finally got the motor apart in my basement and i took a look at the rotor and it looks like something has gotten into the rear housing and damaged the rotor. There are gashes in the rotor and some chucks taken out of the housing! I was wondering if this could be the cause of my no compression, or would it just be the seals?
This is the first time i have taken apart one of these motors and so i am learning as i go
just wondering if anyone could help me out with this. Thanks so much
I will post some pictures of the rotor and housing.
This is the first time i have taken apart one of these motors and so i am learning as i go
just wondering if anyone could help me out with this. Thanks so muchI will post some pictures of the rotor and housing.
12-05-11, 08:55 PM
#5
Original Gangster/Rotary!
iTrader: (213)
Where did you buy the motor from?
Looks like they sold you a blown engine. I see this pretty often out of 'JDM low mile motars!'.... either bad coolant seals or broken apex seals.
Whenever buying these engines they have to be treated as an unknown, and should be torn down and examined by someone who knows what to look for.
P.S. I think Mahjik was asking about the apex seals that came out of the motor..... parts of them probably exited out the exhaust so you won't find 6 complete ones most likely.
Looks like they sold you a blown engine. I see this pretty often out of 'JDM low mile motars!'.... either bad coolant seals or broken apex seals.
Whenever buying these engines they have to be treated as an unknown, and should be torn down and examined by someone who knows what to look for.
P.S. I think Mahjik was asking about the apex seals that came out of the motor..... parts of them probably exited out the exhaust so you won't find 6 complete ones most likely.
12-05-11, 09:06 PM
#6
i bought the motor from this place called "total jdm", i only took a look at the rear rotor and it looks like all the apex seals are there. i was just wondering is it worth it for me to try and fix this motor or should i get my money back and get a another motor somewhere else?
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12-05-11, 10:46 PM
#10
i bought the motor from this place called "total jdm", i only took a look at the rear rotor and it looks like all the apex seals are there. i was just wondering is it worth it for me to try and fix this motor or should i get my money back and get a another motor somewhere else?
12-06-11, 11:08 AM
#12
Rotary Enthusiast
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I'd say the chances you get any money back are close to zero. Importers hardly ever want to warranty a rotary engine and will find any excuse to avoid it, especially an engine that has been torn apart.
12-06-11, 12:02 PM
#13
F'n Newbie...
iTrader: (6)
i bought the motor from this place called "total jdm", i only took a look at the rear rotor and it looks like all the apex seals are there. i was just wondering is it worth it for me to try and fix this motor or should i get my money back and get a another motor somewhere else?
Also, just to clarify.. You know that there is no difference between a Japanese rotary engine and a North American one, right? Physically they are the exact same, with the same components and capabilities.
In the future you may be better off just looking to buy a rebuilt engine from the forum, or picking one up from the many (reputable) engine builders in the states. It might cost a little bit more at the start, but you're more likely to save yourself a LOT of headache and additional costs down the line.
12-06-11, 12:07 PM
#14
the tigerjapanese motor that was sent to me specifically had a disclaimer that they do not give refunds or exchanges for rotary engines. even though that particular engine wasn't blown, it did look like they let it sit at the bottom of Okinawa bay for about a year on a chain as an anchor.
12-06-11, 01:10 PM
#17
Team Doodoo
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usually it's stamped right on the reciept.
the tigerjapanese motor that was sent to me specifically had a disclaimer that they do not give refunds or exchanges for rotary engines. even though that particular engine wasn't blown, it did look like they let it sit at the bottom of Okinawa bay for about a year on a chain as an anchor.
the tigerjapanese motor that was sent to me specifically had a disclaimer that they do not give refunds or exchanges for rotary engines. even though that particular engine wasn't blown, it did look like they let it sit at the bottom of Okinawa bay for about a year on a chain as an anchor.
im always finding things about my motor ahahaha to the OP stay away for JDM import motors, i agree with said above. Buy one from a reputable shop.
12-06-11, 02:33 PM
#18
The place i bought my motor from says they have a 30 day waranty period to refund or exchange a motor if it was defective or damaged in any way, but i am way past that 30 day waranty period on my motor, and thats what they told me, they said they couldnt do anything about it!
I bought the motor and transmission for $1960, i didnt know of any other place at the time where i could purchase a motor, so i settled on one of those shitty japanese motor shops because it was close. Never again though!!!
So i think im just gunna start looking around on the forum and stuff for rebuild parts and stuff. I know i wont beable to reuse the rotor and the rotor housing but do u think i will still beable to reuse the intermediate and rear housings of the engine?
PM me some prices and stuff on the hard parts
I bought the motor and transmission for $1960, i didnt know of any other place at the time where i could purchase a motor, so i settled on one of those shitty japanese motor shops because it was close. Never again though!!!
So i think im just gunna start looking around on the forum and stuff for rebuild parts and stuff. I know i wont beable to reuse the rotor and the rotor housing but do u think i will still beable to reuse the intermediate and rear housings of the engine?
PM me some prices and stuff on the hard parts
Last edited by BeachCat; 12-06-11 at 02:37 PM.
12-07-11, 05:58 PM
#20
Out of curiosity, how much did you pay for your "JDM Engine"?
Also, just to clarify.. You know that there is no difference between a Japanese rotary engine and a North American one, right? Physically they are the exact same, with the same components and capabilities.
In the future you may be better off just looking to buy a rebuilt engine from the forum, or picking one up from the many (reputable) engine builders in the states. It might cost a little bit more at the start, but you're more likely to save yourself a LOT of headache and additional costs down the line.
Also, just to clarify.. You know that there is no difference between a Japanese rotary engine and a North American one, right? Physically they are the exact same, with the same components and capabilities.
In the future you may be better off just looking to buy a rebuilt engine from the forum, or picking one up from the many (reputable) engine builders in the states. It might cost a little bit more at the start, but you're more likely to save yourself a LOT of headache and additional costs down the line.
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