Compression Loss Wont Start? - NoPistons -Mazda Rx7 & Rx8 Rotary Forum

2nd Generation Specific 1986-1992 Discussion

Compression Loss Wont Start?

Reply

 
 
 
Old 07-16-2003, 07:12 PM
  #1  
Member
Thread Starter
 
Join Date: Jun 2003
Location: Wapakoneta, Oh
Posts: 39
Default

i think i might of figured out why my T2 wont run since it was sitting for so long during winter and wasnt put all the way together.



a guy told me that my seals might have shrunk and they need to build compression so the engine will run could that be the reason if so how do i build compression in the engine and does that makes sense compared to my MAFS and my vaccuum lines and exhaust leak but if it didnt have compression why did it turn over and start then die it shouldnt of started should it?



any comments would be great.
bluerush1984 is offline  
Reply With Quote
Old 07-16-2003, 07:15 PM
  #2  
Senior Member
 
Join Date: Jul 2002
Posts: 1,007
Default

you can do the atf trick, refer to FAQ

that helps alot, even with lost compression the engine will start and even run, but will sound like a helicopter and will die, but that will do more damage to it
ChainSawOnSteroids is offline  
Reply With Quote
Old 07-16-2003, 08:02 PM
  #3  
Member
Thread Starter
 
Join Date: Jun 2003
Location: Wapakoneta, Oh
Posts: 39
Default

now see we started the car with no compression and it made the car worse (i thought) but im not sure
bluerush1984 is offline  
Reply With Quote
Old 07-18-2003, 09:32 PM
  #4  
Member
 
Join Date: Mar 2003
Posts: 46
Default

I have a 87 T2 that sat in a junkyard for 4yrs due to a engine fire and when i put it back together the motor still had good compression. I don't think the seals woill shrink or dryrott. I put ATF in it before i started it for the 1st time. But it is possible the motor is low on compression. you will not hurt the engine by starting it. it could be several prolems bad motor, vac leak, fuel probem, bad ignitors, timing,. you should check compression 1st off.
87BADASST2 is offline  
Reply With Quote
Old 07-18-2003, 09:36 PM
  #5  
Senior Member
 
Join Date: Apr 2002
Location: IL
Posts: 2,930
Default

they flood very easily too...
pengaru is offline  
Reply With Quote
Old 07-18-2003, 09:38 PM
  #6  
Senior Member
 
Join Date: Jan 2003
Location: union, new jersey
Posts: 8,079
Default

never heard of apex seals shrinking....... maybe broken apex or side seals
FikseRxSeven is offline  
Reply With Quote
Old 07-19-2003, 07:30 PM
  #7  
Senior Member
 
Join Date: Apr 2002
Location: NASA/JSC - Clear Lake, TX
Posts: 870
Default

Originally Posted by 87BADASST2' date='Jul 18 2003, 07:32 PM
I have a 87 T2 that sat in a junkyard for 4yrs due to a engine fire and when i put it back together the motor still had good compression. I don't think the seals woill shrink or dryrott. I put ATF in it before i started it for the 1st time. But it is possible the motor is low on compression. you will not hurt the engine by starting it. it could be several prolems bad motor, vac leak, fuel probem, bad ignitors, timing,. you should check compression 1st off.
you can hurt a blown engine by starting it. if it has low compression due to a broken apex seal, starting it will just spin the rotors and possibly scratch the housings. if that were to happen, then you will have to spend hundreds more on a rebuild than necessary.
RX7Aggie is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
agrabau
3rd Generation Specific
12
11-19-2005 10:26 PM
gcthree
Rotary Engine Building, Porting & Swaps
8
02-16-2005 11:01 PM
n2audio77
2nd Generation Specific
13
05-26-2002 11:30 AM
n2audio77
2nd Generation Specific
4
05-01-2002 11:24 AM
Squirrel
2nd Generation Specific
3
10-08-2001 08:42 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: Compression Loss Wont Start?


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.