Head Gasket question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*Jonnie Fraz* · 06-16-2005, 06:21 PM

Ok I got the head off my coupe todayand the head gasket was not only blown, but annihilated. It had blown all the way to the out side of the block, not just between cylinders. All the head bolts on the exhaust side were loose except for the front and very back ones. My question is this common or did the head bolts not get torqued down? I am going to say that the motor has been rebuilt because there is no ridge at the top of the cylinders.

***S14DB*** · 06-16-2005, 06:49 PM

Your head lifted off the block and blew out the HG. Your Head bolts streached. Time to buy new ones.

*Jonnie Fraz* · 06-17-2005, 12:21 AM

Thank you, Can any one tell me what caused the head bolts to streach?

***S14DB*** · 06-17-2005, 01:06 AM

The head lifting off the block. As the head lifted up, it pulled on the bolts. Head bolts are usally only a one shot deal. If the engine was rebuilt and the reused the bolts, that's why they streached so easly. Cause you usally only lift the head when you are boosting.

You may as well invest in some ARP head studs.

06-16-2005, 06:21 PM	#1
Jonnie Fraz Premium Member Join Date: Jan 2005 Location: Cali Age: 56 Posts: 1,371 Trader Rating: (29) Rides Gallery: Jonnie Fraz Feedback Score: 29 reviews	Head Gasket question Ok I got the head off my coupe todayand the head gasket was not only blown, but annihilated. It had blown all the way to the out side of the block, not just between cylinders. All the head bolts on the exhaust side were loose except for the front and very back ones. My question is this common or did the head bolts not get torqued down? I am going to say that the motor has been rebuilt because there is no ridge at the top of the cylinders. __________________ Stealth-Custom-Fab.com

06-17-2005, 12:21 AM	#3
Jonnie Fraz Premium Member Join Date: Jan 2005 Location: Cali Age: 56 Posts: 1,371 Trader Rating: (29) Rides Gallery: Jonnie Fraz Feedback Score: 29 reviews	Thank you, Can any one tell me what caused the head bolts to streach? __________________ Stealth-Custom-Fab.com

06-16-2005, 06:49 PM	#2
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Your head lifted off the block and blew out the HG. Your Head bolts streached. Time to buy new ones.

06-17-2005, 01:06 AM	#4
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	The head lifting off the block. As the head lifted up, it pulled on the bolts. Head bolts are usally only a one shot deal. If the engine was rebuilt and the reused the bolts, that's why they streached so easly. Cause you usally only lift the head when you are boosting. You may as well invest in some ARP head studs.