KA24DE Cylinder head threads stripped.... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nissannoob · 05-28-2004, 09:32 PM

My brother and I have just got done removing the top timing chain guide in compliance to the TSB that was released for it. After replacing the valve cover seals, I went to go about tightening all the bolts (per the service manual) in sequence. It was then my brother noticed that the threads on the bolts had shavings of the cylinder head in them! The damn kids who has this car before must've messed them up somehow (tightened too much?). Now when I go to torque them, they just keep turning! We're really freaking out as we fear it may loose compression as the new seal won't seat correctly now. He suggested that I have the holes threaded larger and get new bolts to fit. Just have to be careful when making new threads so that they don't go in lop-sided. Does anyone have any ideas (besides a new KA24DE head)?

ryan hagen · 05-28-2004, 09:54 PM

valve cover bolts holes? any ways i d say heli coils would be best

xl_tess_lx · 05-28-2004, 09:59 PM

mos def heli coils

steve shadows · 05-28-2004, 11:36 PM

Quote:

Originally Posted by nissannoob

My brother and I have just got done removing the top timing chain guide in compliance to the TSB that was released for it. After replacing the valve cover seals, I went to go about tightening all the bolts (per the service manual) in sequence. It was then my brother noticed that the threads on the bolts had shavings of the cylinder head in them! The damn kids who has this car before must've messed them up somehow (tightened too much?). Now when I go to torque them, they just keep turning! We're really freaking out as we fear it may loose compression as the new seal won't seat correctly now. He suggested that I have the holes threaded larger and get new bolts to fit. Just have to be careful when making new threads so that they don't go in lop-sided. Does anyone have any ideas (besides a new KA24DE head)?

so get arps one size bigger and retap the block

ryan hagen · 05-29-2004, 05:36 AM

if its just the valve cover those bolts arnt a common size, they are shaped weird.

05-28-2004, 09:32 PM	#1
nissannoob Join Date: Mar 2004 Location: WI Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	KA24DE Cylinder head threads stripped.... My brother and I have just got done removing the top timing chain guide in compliance to the TSB that was released for it. After replacing the valve cover seals, I went to go about tightening all the bolts (per the service manual) in sequence. It was then my brother noticed that the threads on the bolts had shavings of the cylinder head in them! The damn kids who has this car before must've messed them up somehow (tightened too much?). Now when I go to torque them, they just keep turning! We're really freaking out as we fear it may loose compression as the new seal won't seat correctly now. He suggested that I have the holes threaded larger and get new bolts to fit. Just have to be careful when making new threads so that they don't go in lop-sided. Does anyone have any ideas (besides a new KA24DE head)? __________________ 91 240SX SE Coupe -Upside down DTM muffler (tips point down) -Missing front bumper -No reinforcment bar -Some 14 year old kid took the engine apart before I got it (used SCC magazines as guides...) -Says "240S" on the back -Yep, that's bondo on the side -Guess it's under the category of "ghetto ricer" at the moment, but I'm hoping to change that.

05-28-2004, 09:54 PM	#2
ryan hagen Zilvia FREAK! Join Date: Jan 2003 Location: rhinelander wisconsin Age: 42 Posts: 1,465 Trader Rating: (8) Feedback Score: 8 reviews	valve cover bolts holes? any ways i d say heli coils would be best __________________ 1990 hatch ka24de gt2871r

05-28-2004, 09:59 PM	#3
xl_tess_lx Join Date: May 2004 Location: Florida Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	mos def heli coils __________________ _tess_

05-29-2004, 05:36 AM	#5
ryan hagen Zilvia FREAK! Join Date: Jan 2003 Location: rhinelander wisconsin Age: 42 Posts: 1,465 Trader Rating: (8) Feedback Score: 8 reviews	if its just the valve cover those bolts arnt a common size, they are shaped weird. __________________ 1990 hatch ka24de gt2871r

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