KA24DE Intake Manifold Cleanup Question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

headfirst427 · 05-21-2014, 04:41 PM

Ok, so before I ask my question keep in mind I HAVE searched, with no info specific to what I need to know. I've recently deleted the heater core in my 95 S14, to free up room under the dash and in the engine bay (hoses, valves, intake manifold mess). In doing so, it was clear to me I could also clean up quite a bit of the mess on the intake manifold, so I went ahead and did this as well. My question is this - what do I do with the two lines in PHOTO 2? I see no reason I can't just cap them, as coolant used to flow through them before, but not any more. Is there anything else possible, for a cleaner or more efficient seal?

Also, the throttle body coolant line delete is puzzling me. The nipple that comes off of the intake plenum (PHOTO 3) and heads toward the throttle body - what do I do with that? Sorry ahead of time for seeming so ignorant, I just want to be right...the first time. I dont think simply capping this nipple is the answer, as coolant will be flowing to this area. Maybe I can loop that coolant flow somewhere? Or grind the nipple off and weld it up?? Any input is appreciated!

Thanks in advance!

JH

Kingtal0n · 05-21-2014, 06:53 PM

I dont know about the KA, but on the SR20 if you delete the coolant flow through the throttle body you wind up with idle issues. big time. it has something to do with a wax element that needs heat to expand.

headfirst427 · 05-21-2014, 07:39 PM

Hmm, everything I've found points to the fact it just helps to keep the throttle body from icing up in extremely cold weather. I've yet to hear about a wax element.

waxball88 · 05-21-2014, 07:46 PM

I cut and weld that nipple shut and run coolant hose straight to fire wall heater core by passing lower manifold all together

headfirst427 · 05-21-2014, 08:19 PM

Perfect Wax, I appreciate it. Doesn't seem like there's really any other option unless I'm just totally missing something. I did a total heater core delete, so I'm running the fitting that used to go to the heater core straight out of the block to the back of the thermostat. The throttle body coolant lines seemed ridiculous to me, and it also meant I would have to keep that rat's nest of vacuum lines...

headfirst427 · 05-21-2014, 08:58 PM

And I answered my question about the lines in PHOTO 2 myself...nothing a pair of vice grips couldnt handle

They're just pressed in elbows.

05-21-2014, 04:41 PM	#1
headfirst427 Leaky Injector Join Date: Jun 2012 Location: IE Age: 35 Posts: 87 Trader Rating: (2) Feedback Score: 2 reviews	KA24DE Intake Manifold Cleanup Question Ok, so before I ask my question keep in mind I HAVE searched, with no info specific to what I need to know. I've recently deleted the heater core in my 95 S14, to free up room under the dash and in the engine bay (hoses, valves, intake manifold mess). In doing so, it was clear to me I could also clean up quite a bit of the mess on the intake manifold, so I went ahead and did this as well. My question is this - what do I do with the two lines in PHOTO 2? I see no reason I can't just cap them, as coolant used to flow through them before, but not any more. Is there anything else possible, for a cleaner or more efficient seal? Also, the throttle body coolant line delete is puzzling me. The nipple that comes off of the intake plenum (PHOTO 3) and heads toward the throttle body - what do I do with that? Sorry ahead of time for seeming so ignorant, I just want to be right...the first time. I dont think simply capping this nipple is the answer, as coolant will be flowing to this area. Maybe I can loop that coolant flow somewhere? Or grind the nipple off and weld it up?? Any input is appreciated! Thanks in advance! JH __________________ 1995 S14...1st Project

05-21-2014, 06:53 PM	#2
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 41 Posts: 4,828 Trader Rating: (17) Feedback Score: 17 reviews	I dont know about the KA, but on the SR20 if you delete the coolant flow through the throttle body you wind up with idle issues. big time. it has something to do with a wax element that needs heat to expand. __________________ 5.3/4l80e/turbo 240sx playthrough: tinyurl.com/4l80er

05-21-2014, 07:39 PM	#3
headfirst427 Leaky Injector Join Date: Jun 2012 Location: IE Age: 35 Posts: 87 Trader Rating: (2) Feedback Score: 2 reviews	Hmm, everything I've found points to the fact it just helps to keep the throttle body from icing up in extremely cold weather. I've yet to hear about a wax element. __________________ 1995 S14...1st Project

05-21-2014, 08:19 PM	#5
headfirst427 Leaky Injector Join Date: Jun 2012 Location: IE Age: 35 Posts: 87 Trader Rating: (2) Feedback Score: 2 reviews	Perfect Wax, I appreciate it. Doesn't seem like there's really any other option unless I'm just totally missing something. I did a total heater core delete, so I'm running the fitting that used to go to the heater core straight out of the block to the back of the thermostat. The throttle body coolant lines seemed ridiculous to me, and it also meant I would have to keep that rat's nest of vacuum lines... __________________ 1995 S14...1st Project

05-21-2014, 08:58 PM	#6
headfirst427 Leaky Injector Join Date: Jun 2012 Location: IE Age: 35 Posts: 87 Trader Rating: (2) Feedback Score: 2 reviews	And I answered my question about the lines in PHOTO 2 myself...nothing a pair of vice grips couldnt handle They're just pressed in elbows. __________________ 1995 S14...1st Project

05-21-2014, 07:46 PM	#4
waxball88 Zilvia FREAK! Join Date: Jun 2009 Location: Gainesville Posts: 1,061 Trader Rating: (9) Feedback Score: 9 reviews	I cut and weld that nipple shut and run coolant hose straight to fire wall heater core by passing lower manifold all together