ivonr Posted May 13, 2015 Posted May 13, 2015 My front passenger side CV boot is torn and leaking slowly. 1. Is this due to normal wear or can nearby down pipe heat be suspect? 2. Some say that heat wrapping the downpipe can accelerate rust from salt buildup/winter driving in snow States. Is it true? 3. If downpipe heat causes nearby CV boot wear, is Is it possible to spray the downpipe (without removal) only in the area near the CV boot to prevent heat damage?
Andy_Mac Posted May 13, 2015 Posted May 13, 2015 So you have an aftermarket downpipe with nothing on it to retain the heat? 2000 Legacy B4 RSK - SOLD 2006 Legacy BP5 GT Spec B wagon - Garage Thread 2011 VW T5 van 2.0L of turbo diesel awesomeness
Max Capacity Posted May 13, 2015 Posted May 13, 2015 My Invidia dp pipe is heat wrapped down to the last bend on both cars. My wagon has been that way for 3 of the 4 years its been on. The wagon has the original right axle still. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here
ivonr Posted May 13, 2015 Author Posted May 13, 2015 So you have an aftermarket downpipe with nothing on it to retain the heat? Correct
Max Capacity Posted May 13, 2015 Posted May 13, 2015 Just asking, do you sit in traffic a lot, or only drive the car for short distances letting the car idle ? 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here
I3eXa Posted May 13, 2015 Posted May 13, 2015 my dp is unwrapped too and just saw that my passenger side inner boot is ripped...maybe I will buy some wrap
Moderators BarManBean Posted May 13, 2015 Moderators Posted May 13, 2015 FWIW, I really like my downpipe heat blanket. Easy to install and does a great job. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock
ivonr Posted May 13, 2015 Author Posted May 13, 2015 Just asking, do you sit in traffic a lot, or only drive the car for short distances letting the car idle ? I do both FWIW, I really like my downpipe heat blanket. Easy to install and does a great job. Is there any heat control option that doesn't require removing the DP?
JmP6889928 Posted May 13, 2015 Posted May 13, 2015 I'm working on a heat shield now to sell. I have one on my own car that I made and it works great. My Cobb is wrapped now, but I drove it without wrap for about 18 months and with my heat shield, and no issues-still the stock axle.
MTBwrench Posted May 13, 2015 Posted May 13, 2015 I'll bet it has a to to do with how much city vs. highway driving you do, and how hard you push the car. Sitting in traffic, EGTs may never get that high, but there's zero airflow down there. In summer months I'll bet it heats up pretty good. On the same token, pushing it really hard on the highway or any high speed situation probably heats it up just as well. MTBwrench's Stage 3 5EAT #racewagon 266awhp/255awtq @17.5psi, Tuned By Graham of Boosted Performance Everyone knows what I taste like.
Max Capacity Posted May 13, 2015 Posted May 13, 2015 That's my point ^ but at least on the highway, there's a ton of air flow and you never just do that and park the car. Now if you did some WOT and then had to stop fast to sit in traffic... As I have always thought highway miles are the easiest on the car. They like to be driven for distance. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here
ivonr Posted May 14, 2015 Author Posted May 14, 2015 Sorry if this is listed elsewhere, but the common CV boot tear on these cars...is it due to down pipe heat? Or just normal wear?
boxman Posted May 14, 2015 Posted May 14, 2015 Heat. It's also why the valve cover gasket on the passenger side usually fails first.
Kevin622 Posted May 14, 2015 Posted May 14, 2015 Can you wrap the catted section of the downpipe? I've had my downpipe on for a little over 15k and it is not wrapped and I also have a torn cv boot that threw grease all over my downpipe and stuff
Akasa Posted May 14, 2015 Posted May 14, 2015 http://legacygt.com/forums/showthread.php/my05-09-legacy-gt-common-issues-230230.html It is a common problem. I've rebuilt my axle once before. John, i'd be interested in a CV boot heat shield if that's what you're talking about.
Max Capacity Posted May 14, 2015 Posted May 14, 2015 FWIW, the catted Invidia dp that I bought from BMB is not wrapped around the cat, just the one twist of wrap to get past it. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here
Kevin622 Posted May 14, 2015 Posted May 14, 2015 Do you wrap the top section before the cat then after the cat? I have a cnt so the cat is in the same spot
Moderators BarManBean Posted May 14, 2015 Moderators Posted May 14, 2015 Is there any heat control option that doesn't require removing the DP? You could possibly install a blanket without removal, I wouldn't bother trying to wrap tho. FWIW, the catted Invidia dp that I bought from BMB is not wrapped around the cat, just the one twist of wrap to get past it. Do you wrap the top section before the cat then after the cat? I have a cnt so the cat is in the same spot My research pointed me to not wrap the cat itself. It may not cause an issue, but one school of thought is that wrapping the cat can cause excess heat to build up there to the point of damaging the cat converter and I didn't want that to happen. YMMV, and unfortunately it *will* be the hottest part on the pipe so not wrapping it is a bit unfortunate I guess. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock
Kevin622 Posted May 14, 2015 Posted May 14, 2015 Yup totally understand that. I wish I went with a Cobb with the cat being at the lower section. Or even catless
ivonr Posted May 14, 2015 Author Posted May 14, 2015 Someone point me to a good heat shield or blanket so I don't have to take my DP off please
Moderators BarManBean Posted May 14, 2015 Moderators Posted May 14, 2015 Call these people: http://www.thermalzero.com/index.php?option=com_virtuemart&view=category&virtuemart_category_id=36 They don't look to have it on their site, but that's where I got my DP blanket. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock
I Donated Too luchadorjose Posted May 14, 2015 I Donated Too Posted May 14, 2015 I had my downpipe ceramic coated, it significantly brought down my temps in the engine bay, and (from feel) seemed to bring down the heat radiating off of the downpipe. the pipe stays warm for much longer after the car is off though, warm to the touch after a few hours when the stock downpipe would have been cold
boxman Posted May 14, 2015 Posted May 14, 2015 Can you wrap the catted section of the downpipe? I've had my downpipe on for a little over 15k and it is not wrapped and I also have a torn cv boot that threw grease all over my downpipe and stuff I did not wrap the catted section of my Cobb pipe, but it's right down at the joint with the midpipe vs. those that are catted at the firewall. I'd likely have wrapped it if it were at the firewall.
Kevin622 Posted May 15, 2015 Posted May 15, 2015 I don't want to damage the cat though if it gets too hot
ivonr Posted May 15, 2015 Author Posted May 15, 2015 I am looking into using this for my CNT catted DP http://m.summitracing.com/parts/the-11600?seid=srese1&gclid=CjwKEAjwj9GqBRCRlPram97Xk3ESJADrN7IeFCct1k7Q49_NIoZth6jXZrK4KjRlSDrHCRHN74jaMBoCnALw_wcB but I have my doubts as the catted section is obviously wider than 3"...thoughts?
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