Welded shut heater pipes - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

heated heavy · 10-22-2006, 04:43 PM

I noticed the other day that the shop that did my SR20DE swap completely welded shut my heater pipes leading to the firewall instead of looping them together to allow water to circulate.
Would this effect my coolant temp sensor or AAC valve (since it is connected to one of the pipes) in any way at all.
My car is running rich, idles bad, and even dies occasionally at dead stops.
Ive recently insalled an adjustable FPR, new O2 sensor, checked timing, checked injectors for leaks, checked vacuum lines for leaks, and checked AAC valve.
I also noticed when I checked my AAC valve that my intake ports in the head had a puddle of dried up fuel. I dont know if was from before I installed my adjustable FPR or if it is still being flooded with fuel.
I also have to crank my engine about 10 times to get it to start. And when it does it stutters and wants to die unless I give it some gas so it can idle without dying.

backroadtouge · 10-22-2006, 05:28 PM

well it sounds like you need to go back to where your swap was done and raise da hell! or um, tell them whats going on

projectRDM · 10-22-2006, 07:11 PM

Yes, without a loop the coolant isn't properly circulating through the system.

RyanA96 · 10-22-2006, 08:25 PM

not true, you can either close them off or circulate. Circulating through the heater core does keep things a little cooler though because it acts as a little radiator.

10-22-2006, 04:43 PM	#1
heated heavy Zilvia Member Join Date: Jun 2003 Location: Southern California Posts: 286 Trader Rating: (0) Feedback Score: 0 reviews	Welded shut heater pipes I noticed the other day that the shop that did my SR20DE swap completely welded shut my heater pipes leading to the firewall instead of looping them together to allow water to circulate. Would this effect my coolant temp sensor or AAC valve (since it is connected to one of the pipes) in any way at all. My car is running rich, idles bad, and even dies occasionally at dead stops. Ive recently insalled an adjustable FPR, new O2 sensor, checked timing, checked injectors for leaks, checked vacuum lines for leaks, and checked AAC valve. I also noticed when I checked my AAC valve that my intake ports in the head had a puddle of dried up fuel. I dont know if was from before I installed my adjustable FPR or if it is still being flooded with fuel. I also have to crank my engine about 10 times to get it to start. And when it does it stutters and wants to die unless I give it some gas so it can idle without dying.

10-22-2006, 05:28 PM	#2
backroadtouge Zilvia Member Join Date: Sep 2006 Location: TEXAS Posts: 217 Trader Rating: (0) Feedback Score: 0 reviews	well it sounds like you need to go back to where your swap was done and raise da hell! or um, tell them whats going on __________________ お金も腕も、何も無い・

10-22-2006, 07:11 PM	#3
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Yes, without a loop the coolant isn't properly circulating through the system.

10-22-2006, 08:25 PM	#4
RyanA96 Zilvia Member Join Date: Apr 2005 Location: Buffalo,NY Age: 38 Posts: 175 Trader Rating: (0) Feedback Score: 0 reviews	not true, you can either close them off or circulate. Circulating through the heater core does keep things a little cooler though because it acts as a little radiator.