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View Full Version : replaced headgasket and no compression!


chetacheese
05-08-2010, 04:47 PM
hey guys, i just replaced my headgasket and the motor wont fire up. it was running before and once everything is reassembled, it will crank but not turn over. i have spark, fuel, but no compression.

i think it may be cam timing- i cant find any guides or anything on proper cam seating. i used the fsm and checked the mating marks to make sure they match up with the book.

or

maybe i set it at the wrong tdc since tdc comes twice. how can i tell if im in the compression cycle of tdc without using the cam lobes as guides(may be possible its off)

please help.. im starting to give up.

prymer 240
05-08-2010, 05:00 PM
your timing is prolly way off... check ur timing.

chetacheese
05-08-2010, 05:16 PM
the dizzy timing?

even if that was off wouldnt i still get compression?

fcdrifter20
05-08-2010, 05:26 PM
did you compression test it?, or are you just saying you have no compression because it dont turn over?

chetacheese
05-08-2010, 07:35 PM
yea i did do the test. the gauge needle wont move! which means no compression? or am i doing something wrong.

importdude
05-08-2010, 08:04 PM
your lower chain might of sliped
did u hold it up/jam it so it wont drop when u replaced the HG?

chetacheese
05-08-2010, 08:30 PM
yes i did. i put a wooden piece just like the fsm said.

importdude
05-08-2010, 08:44 PM
seems like your lower chain skiped/sliped

did u SET it at tdc and marked the chain/gear(loweR)
before u removed it?

are u getting fuel into the cylinders
check your feed/fpr return line if they are correct

check your dis. Restab it a few times
if S14 your rotor contactor part should be facing between the coil and the dis plug when centered with bolt

05-08-2010, 08:47 PM
yupp, redo your timing.

chetacheese
05-09-2010, 01:23 PM
its an s13. im getting fuel for sure, and a spark. i dont have compression says the compression tester. i didnt the lower timing change though. i put a wooden block so that the timing chain wouldnt come off at the crank.

how can i tell if im on the compression tdc without guidance from the cams? is there anything else that would tell me its in compresstion tdc?

importdude
05-09-2010, 01:44 PM
the crank marks
or use something long like the oil dip stick in the cylinder 1 hole

chetacheese
05-10-2010, 04:10 AM
but with those methods, how do you know if its in the compression stroke. tdc comes around twice in a full cycle right?