KA24DE valve seals - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

neilsan · 04-26-2005, 12:48 AM

can these be replaced with the head on the block? Ive never taken apart any valvetrane components before so I dont know if there's any pro-tips i should know.

usctom · 04-26-2005, 08:31 AM

They could be done with the head one just have to make sure the valve doesnt drop. Then you will have to take it off anyways.
Tom

AzNCmB · 04-26-2005, 11:37 AM

yea, you can do change these out with the head still on the block, from what i was told by a mechanic, you would have to use an air compressor and have a fitting inside the spark plug holes and keep air in each cylinder so that the valves wont drop while ur taking retainers and stuff off to get to the valve seals....

if i'm incorrect, someone please correct me...thanks

usctom · 04-26-2005, 12:13 PM

yeah u would need to use a compressor.

orion::S14 · 04-26-2005, 04:31 PM

Another trick I've seen for us shade-tree mechanics is to fill the cylinder with string when it not at TDC...then turn the motor over to TDC on that cylinder, and the pisont will go up, stuff the string against the head, and hold the valves in place.

...

As for pulling the valve springs...it'll be quite hard to compress the springs without the Nissan tool for it, so I reccomend AT LEAST that tool. Doing it by hand is damn near impossible, and unsafe.

- Brian

neilsan · 04-26-2005, 06:34 PM

Haha, the string idea is awesome. its probably what i'll end up doing

cuz the only fitting I know of threaded for spark plugs is my compression guage and Im not so sure i can adapt it to my hose.

Thanks. I'll look into that valve spring tool if my dad doesnt have something adequate.

04-26-2005, 12:48 AM	#1
neilsan Zilvia Junkie Join Date: Sep 2004 Location: east coast Age: 43 Posts: 333 Trader Rating: (0) Feedback Score: 0 reviews	KA24DE valve seals can these be replaced with the head on the block? Ive never taken apart any valvetrane components before so I dont know if there's any pro-tips i should know.

04-26-2005, 04:31 PM	#5
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	Another trick I've seen for us shade-tree mechanics is to fill the cylinder with string when it not at TDC...then turn the motor over to TDC on that cylinder, and the pisont will go up, stuff the string against the head, and hold the valves in place. ... As for pulling the valve springs...it'll be quite hard to compress the springs without the Nissan tool for it, so I reccomend AT LEAST that tool. Doing it by hand is damn near impossible, and unsafe. - Brian __________________ www.KA24DEvelopment.com

04-26-2005, 08:31 AM	#2
usctom Leaky Injector Join Date: Jun 2003 Location: ny Posts: 145 Trader Rating: (0) Feedback Score: 0 reviews	They could be done with the head one just have to make sure the valve doesnt drop. Then you will have to take it off anyways. Tom

04-26-2005, 11:37 AM	#3
AzNCmB Zilvia FREAK! Join Date: Jan 2003 Location: NOLA Age: 39 Posts: 1,144 Trader Rating: (2) Feedback Score: 2 reviews	yea, you can do change these out with the head still on the block, from what i was told by a mechanic, you would have to use an air compressor and have a fitting inside the spark plug holes and keep air in each cylinder so that the valves wont drop while ur taking retainers and stuff off to get to the valve seals.... if i'm incorrect, someone please correct me...thanks

04-26-2005, 12:13 PM	#4
usctom Leaky Injector Join Date: Jun 2003 Location: ny Posts: 145 Trader Rating: (0) Feedback Score: 0 reviews	yeah u would need to use a compressor.

04-26-2005, 06:34 PM	#6
neilsan Zilvia Junkie Join Date: Sep 2004 Location: east coast Age: 43 Posts: 333 Trader Rating: (0) Feedback Score: 0 reviews	Haha, the string idea is awesome. its probably what i'll end up doing cuz the only fitting I know of threaded for spark plugs is my compression guage and Im not so sure i can adapt it to my hose. Thanks. I'll look into that valve spring tool if my dad doesnt have something adequate.