2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

engine compression question

Thread Tools
 
Search this Thread
 
Old 04-15-05, 11:23 PM
  #1  
Full Member

Thread Starter
 
White Rice's Avatar
 
Join Date: Sep 2004
Location: New Jersey
Posts: 156
Likes: 0
Received 0 Likes on 0 Posts
engine compression question

im pretty sure my motor is blown but i have a question thats bothering me
-after compression testing it my front rotor reads 30psi with 3 even hits on the needle so that rotor is fine
-my rear is showing no compression at all after re inserting the gauge multiple times so i know i did it right

when i do the ghetto compression test the pulses come out even and the way they should on both rotors but very weak in the rear

i accept it if my motor is blown and i bought a beater im drivin right now so i have somethin to drive while i fix my 7 but i just think its weird that the comp. is reading like this and the engine jus died the way it did after runnin like a beast

could this be maybe an injection problem or some other type of problem that would cause the comp. to jus die like that?

ive heard of people breakin all seals at once, but from what ive read its very rare, so im confused any ideas?
Old 04-15-05, 11:30 PM
  #2  
Lives on the Forum

iTrader: (8)
 
RotaryResurrection's Avatar
 
Join Date: Oct 2003
Location: Morristown, TN (east of Knoxville)
Posts: 11,576
Received 25 Likes on 18 Posts
It's normal for them to let go all at once with no notice. You normally dont hear anything, just feel a hesitation and then power loss on the next gearshift.

If the gauge says 0, it's gone.

It's normal to hear a little bit of air noises from a dead rotor, even though no compression is occuring a little air does get whisped around by the rotor.
Old 04-15-05, 11:52 PM
  #3  
Full Member

Thread Starter
 
White Rice's Avatar
 
Join Date: Sep 2004
Location: New Jersey
Posts: 156
Likes: 0
Received 0 Likes on 0 Posts
alright thanks alot...that eliminates any doubt time to save for rebuild
Old 04-16-05, 12:29 AM
  #4  
GrapefruitRacing?

 
RXciting's Avatar
 
Join Date: Apr 2003
Location: PartSource
Posts: 2,155
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by White Rice
-after compression testing it my front rotor reads 30psi with 3 even hits on the needle so that rotor is fine
Now this might be the Lack of sleep, Bad Beer, undercooked meat and the fumes from the BBQ talking but last time i checked 30psi on comression is no where near fine.. sounds like both front and back are toast.. hopefully 1 of the housings is salvagable.

Good luck
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
elfking
3rd Generation Specific (1993-2002)
3
08-19-15 09:48 PM



Quick Reply: engine compression question



All times are GMT -5. The time now is 12:29 PM.