Brake pedal to the floor (again) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Flicktitty · 07-31-2012, 08:23 AM

So i did a Q45 brake swap on the S13 coupe over winter, Noticed it was leaking fluid from the caliper, So i replaced the caliper and didn't see any more leaks. Bleed the brakes pedal was good as new. then i noticed the reservoir was going down without using the brakes (just sitting in the garage) I I went back through didn't see any leaks so i assumed with the new Q45 stuff it might have killed the BMC. So i replaced that. bleed the brakes. pedal was fine. Went around the block car was good. parked it and then loaded it onto a trailer took it to get dynoed, now the pedal just goes to the floor.

Run down of parts-
Stainless steel lines.
1 Refurbished Q45 Caliper
1 Used Q45 Caliper
"cheap" temporary brake pads
Sentra SE-R EBC Rotors
DOT4 Brake Fluid
Refurbished BMC

So most of the parts have been replaced on the front, i'm still not seeing any leaks, I Suppose the used caliper could be bad, or maybe something with the rear? Any ideas?

Sileighty_85 · 07-31-2012, 09:27 AM

Did you bench Bleed the MC?

Flicktitty · 07-31-2012, 10:41 AM

Quote:

Originally Posted by Sileighty_85

Did you bench Bleed the MC?

Yessur i did, Did it till there was no visible air coming out then bleed all 4 brakes. Pedal was fine for a few weeks just sitting, then it went to the floor after a few times pressing it.

rwtf · 07-31-2012, 03:22 PM

got a leak somewhere.

PureRush · 07-31-2012, 03:28 PM

Yeah you have a leak somewhere. Take off all the calipers and check for brake fluid and check the lines. If there's no visible leaks then it's an internal problem in your BMC

07-31-2012, 08:23 AM	#1
Flicktitty Post Whore! Join Date: Apr 2007 Location: Wisconsin Age: 34 Posts: 3,685 Trader Rating: (13) Feedback Score: 13 reviews	Brake pedal to the floor (again) So i did a Q45 brake swap on the S13 coupe over winter, Noticed it was leaking fluid from the caliper, So i replaced the caliper and didn't see any more leaks. Bleed the brakes pedal was good as new. then i noticed the reservoir was going down without using the brakes (just sitting in the garage) I I went back through didn't see any leaks so i assumed with the new Q45 stuff it might have killed the BMC. So i replaced that. bleed the brakes. pedal was fine. Went around the block car was good. parked it and then loaded it onto a trailer took it to get dynoed, now the pedal just goes to the floor. Run down of parts- Stainless steel lines. 1 Refurbished Q45 Caliper 1 Used Q45 Caliper "cheap" temporary brake pads Sentra SE-R EBC Rotors DOT4 Brake Fluid Refurbished BMC So most of the parts have been replaced on the front, i'm still not seeing any leaks, I Suppose the used caliper could be bad, or maybe something with the rear? Any ideas? __________________ 2JZ-GTE Swapped S13 Coupe - 1994 Supra Turbo

07-31-2012, 09:27 AM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Did you bench Bleed the MC? __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online #/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-31-2012, 03:22 PM	#4
rwtf Zilvia Addict Join Date: Jun 2011 Location: Maryville, TN Age: 29 Posts: 830 Trader Rating: (3) Feedback Score: 3 reviews	got a leak somewhere. __________________

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07-31-2012, 03:28 PM	#5
PureRush Zilvia Addict Join Date: Oct 2011 Location: Orange County Posts: 893 Trader Rating: (15) Feedback Score: 15 reviews	Yeah you have a leak somewhere. Take off all the calipers and check for brake fluid and check the lines. If there's no visible leaks then it's an internal problem in your BMC