Bough my 370Z back...now it's time to restore it. (Mini-rebuild thread?)

AlphaSnacks · 06-02-2018, 08:52 PM

Mechanical update (this is lengthy):

Jun 1st: The Z had a stall today...a weird one too. Not 100% sure what caused it, but I suspect throttle bodies, which I've been needing to clean.

I drove the car to Wendy's for all of half a mile. Took a roundabout with some gusto to the left. Drove in to the parking lot, reversed the car into a spot just fine. Came back 3 mins later to start it: it starts and then stalls out. Tried it 2-3 times, same result: starts then stalls 1 second later. So I went the old school route, I hit the throttle as soon as it starts and that worked. The engine revved up, and it ran just fine thereafter settling at idle.

Today, June 2nd, was my appointment with Andrew over at his shop in Sanford, FL to get the axle click fixed on the car. And this weekend on Sunday, I was going to clean the throttle bodies. But we'll be doing all of that in one day instead and then resetting and relearning ECU and all throttle sensors. Gas tank was anywhere between 1/4 or 1/3, and lower...but it was a left turn, and not right. So not sure if it was fuel starved, especially since it didn't cut off right after the turn and I was still able to park it.

So I'm home now, and the axle click is totally fixed. The splines and axle were incredibly dirty and full of rust. The entire axle and spline were completely cleaned up using a spray and wirebrush numerous times until they were bright and silver again, and then a healthy glop of Moly grease was administered on each side.

Then there was an oil leak spotted and traced back to my oil cooler. The bottom hose was rubbing against the front sway bar and it was causing seepage. Andrew re-clocked the positioning of both hoses to give them clearance from all nearby components and then cleaned up the entire undercarriage soaked in oil. The car was low 1.25 qt (though some of that was spillage from when the hoses were taken off). Hopefully, that's all sorted out going forward. But I'll have to keep an eye on it and inspect visually every now and then for signs of oil.

Lastly, the MAF sensor and TBs were cleaned. And while the MAF sensor was pretty clean overall...the throttle body was absolutely gunked up. I mean truly awful. I'll be posting some before and afters of them...but trust me, nasty.

One of the plastic intake mufflers (the ones that connect to the intake tube) broke with a very light touch trying to remove it from the intake tube, which made me wonder if it was in bad shape and had a crack at the elbow the whole time causing a vacuum leak (and thus the stall?). But Andrew had a few spare parts laying around that he was able to use to sort the issue.

The diff bushings are shot and need to be replaced, as well. But that'll be for the next visit. And I'll be deadening the entire rear end + wheel wells with Second Skin Luxury Liner Pro.

As of now, the car drives very well and you can feel a much improved feel of power and response.

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06-02-2018, 08:52 PM	#16 (permalink)
AlphaSnacks A True Z Fanatic Join Date: Jan 2010 Location: Windermere, FL Posts: 1,618 Drives: '13 XKR-S, '10 370Z Rep Power: 20	Mechanical update (this is lengthy): Jun 1st: The Z had a stall today...a weird one too. Not 100% sure what caused it, but I suspect throttle bodies, which I've been needing to clean. I drove the car to Wendy's for all of half a mile. Took a roundabout with some gusto to the left. Drove in to the parking lot, reversed the car into a spot just fine. Came back 3 mins later to start it: it starts and then stalls out. Tried it 2-3 times, same result: starts then stalls 1 second later. So I went the old school route, I hit the throttle as soon as it starts and that worked. The engine revved up, and it ran just fine thereafter settling at idle. Today, June 2nd, was my appointment with Andrew over at his shop in Sanford, FL to get the axle click fixed on the car. And this weekend on Sunday, I was going to clean the throttle bodies. But we'll be doing all of that in one day instead and then resetting and relearning ECU and all throttle sensors. Gas tank was anywhere between 1/4 or 1/3, and lower...but it was a left turn, and not right. So not sure if it was fuel starved, especially since it didn't cut off right after the turn and I was still able to park it. So I'm home now, and the axle click is totally fixed. The splines and axle were incredibly dirty and full of rust. The entire axle and spline were completely cleaned up using a spray and wirebrush numerous times until they were bright and silver again, and then a healthy glop of Moly grease was administered on each side. Then there was an oil leak spotted and traced back to my oil cooler. The bottom hose was rubbing against the front sway bar and it was causing seepage. Andrew re-clocked the positioning of both hoses to give them clearance from all nearby components and then cleaned up the entire undercarriage soaked in oil. The car was low 1.25 qt (though some of that was spillage from when the hoses were taken off). Hopefully, that's all sorted out going forward. But I'll have to keep an eye on it and inspect visually every now and then for signs of oil. Lastly, the MAF sensor and TBs were cleaned. And while the MAF sensor was pretty clean overall...the throttle body was absolutely gunked up. I mean truly awful. I'll be posting some before and afters of them...but trust me, nasty. One of the plastic intake mufflers (the ones that connect to the intake tube) broke with a very light touch trying to remove it from the intake tube, which made me wonder if it was in bad shape and had a crack at the elbow the whole time causing a vacuum leak (and thus the stall?). But Andrew had a few spare parts laying around that he was able to use to sort the issue. The diff bushings are shot and need to be replaced, as well. But that'll be for the next visit. And I'll be deadening the entire rear end + wheel wells with Second Skin Luxury Liner Pro. As of now, the car drives very well and you can feel a much improved feel of power and response.