SR is under reconstruction please help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

landins13 · 02-19-2009, 11:12 PM

ok so real quick, the last time my motor was together i had coolant flooding into cylinder 4 and i need to uncover why before i reassemble the motor yet again. the motor has been to the machine shop right before this was happening and again afterwords. the block is not cracked, and it is perfectly flat i had it redecked after breaking it down again.

the bad, the head had 6 bent valves 2 bad seats and 4 cracked valve guids. all of which are being replaced... the head is at MAMS getting rebuilt with all brian crower parts.

now my question is, is there a way that the coolant could have been finding its way from the head into the cylinder given the issues with the head, or is it more likelly to have been a bad gasket or something along those lines. i need to know asap. oh and ironically enough the head is not warped in any way.

blownmotor · 02-19-2009, 11:18 PM

The only thing stopping coolant getting into your cylinders is the headgasket. bent valves, cracked guides, only allows oil in and loss of compression.

jskateborders · 02-19-2009, 11:27 PM

yea, pretty much what he said. The only other way would be a crack in the cylinder wall, which would be very, very apparent. Just the headgasket. FYI I found out my headgasket was out when I went to comp test the motor and it started shooting water out of the spark plug wells.

landins13 · 02-20-2009, 01:11 PM

yeah it was really wierd, i assumed it was the head gasket since the block is not cracked, but i want to be 100% before i bother reassembling the motor again

02-19-2009, 11:12 PM	#1
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	SR is under reconstruction please help ok so real quick, the last time my motor was together i had coolant flooding into cylinder 4 and i need to uncover why before i reassemble the motor yet again. the motor has been to the machine shop right before this was happening and again afterwords. the block is not cracked, and it is perfectly flat i had it redecked after breaking it down again. the bad, the head had 6 bent valves 2 bad seats and 4 cracked valve guids. all of which are being replaced... the head is at MAMS getting rebuilt with all brian crower parts. now my question is, is there a way that the coolant could have been finding its way from the head into the cylinder given the issues with the head, or is it more likelly to have been a bad gasket or something along those lines. i need to know asap. oh and ironically enough the head is not warped in any way. __________________ NO HANDS IN PANTS!!

02-19-2009, 11:27 PM	#3
jskateborders Zilvia FREAK! Join Date: Apr 2007 Location: Tucson AZ Age: 36 Posts: 1,258 Trader Rating: (5) Feedback Score: 5 reviews	yea, pretty much what he said. The only other way would be a crack in the cylinder wall, which would be very, very apparent. Just the headgasket. FYI I found out my headgasket was out when I went to comp test the motor and it started shooting water out of the spark plug wells. __________________ "I am Norwegian, and are not familiar with your urban words :P"

02-20-2009, 01:11 PM	#4
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	yeah it was really wierd, i assumed it was the head gasket since the block is not cracked, but i want to be 100% before i bother reassembling the motor again __________________ NO HANDS IN PANTS!!

02-19-2009, 11:18 PM	#2
blownmotor Zilvia Junkie Join Date: May 2006 Location: land of the sideshows Posts: 402 Trader Rating: (0) Feedback Score: 0 reviews	The only thing stopping coolant getting into your cylinders is the headgasket. bent valves, cracked guides, only allows oil in and loss of compression.