Molal24 Posted February 4, 2009 Share Posted February 4, 2009 Ok I've just about had enough of the damn rattle I hear. I know it's the engine cover. I have put velcro on both driver side engine clips. I didn't do the passenger sides because they were tight but I'm thinking of doing it to see what happens. Whenever I turn on the rear defrost that rattle of the engine cover is unbearable (or atleast I think its the cover) Any advice? Link to comment Share on other sites More sharing options...
Regal05LGT Posted February 4, 2009 Share Posted February 4, 2009 Take it off? Link to comment Share on other sites More sharing options...
EquinnoxX Posted February 4, 2009 Share Posted February 4, 2009 Mine has rattled a bit after I installed the bigger TMIC. I've got two thin strips of foam insulation I plan to glue to the underside of it once it gets warmer out. Link to comment Share on other sites More sharing options...
Max Capacity Posted February 4, 2009 Share Posted February 4, 2009 Take it off? Like he said, I removed mind within 2 weeks of buying the car. That would have been sometime in early Jul 04. You don't need that useless thing. All it did was add cost to the car. 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 Link to comment Share on other sites More sharing options...
TRS Posted February 4, 2009 Share Posted February 4, 2009 Whenever I turn on the rear defrost that rattle of the engine cover is unbearable I'm lost. How does the rear window defroster make the engine cover vibrate/rattle? Extra strain on the alt? Link to comment Share on other sites More sharing options...
GTTuner Posted February 4, 2009 Share Posted February 4, 2009 Like he said, I removed mind within 2 weeks of buying the car. That would have been sometime in early Jul 04. You don't need that useless thing. All it did was add cost to the car. On the contrary, it rams the air thru the top mount. I has a function. Link to comment Share on other sites More sharing options...
Reuben Posted February 4, 2009 Share Posted February 4, 2009 That's what the splitter is for... Unless BL/BP's don't get splitters? Engine covers are 100% useless. Link to comment Share on other sites More sharing options...
Molal24 Posted February 4, 2009 Author Share Posted February 4, 2009 I'm lost. How does the rear window defroster make the engine cover vibrate/rattle? Extra strain on the alt? I know it's weird because it comes on when the rear defrost is on. It's wild. Link to comment Share on other sites More sharing options...
Max Capacity Posted February 4, 2009 Share Posted February 4, 2009 May be because the alternator is drawing power and it changes the resonance. Maybe the alternator is touching the cover. Remove it you want notice any performance difference. The cover is there because Subaru wanted to be a German car look a like. 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 Link to comment Share on other sites More sharing options...
rao Posted February 4, 2009 Share Posted February 4, 2009 Welcome to 2005 http://www.legacygt.com/forums/showpost.php?p=205673&postcount=14 Pictures - http://www.legacygt.com/forums/showpost.php?p=205705&postcount=16 Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
Underdog Posted February 4, 2009 Share Posted February 4, 2009 That's what the splitter is for... Unless BL/BP's don't get splitters? Engine covers are 100% useless. We do have splitters but out engine covers do serve a function of forcing the air to travel through the TMIC. The splitter "splits" the air flow so that it is equally distributed over the TMIC and the seal between the hood and engine cover/TMIC ensures that there is no blow-by. The Crimson Dynamo Link to comment Share on other sites More sharing options...
05GT Guru Posted February 4, 2009 Share Posted February 4, 2009 The cover is useless Link to comment Share on other sites More sharing options...
Underdog Posted February 4, 2009 Share Posted February 4, 2009 The Crimson Dynamo Link to comment Share on other sites More sharing options...
Underdog Posted February 4, 2009 Share Posted February 4, 2009 The cover is useless Image 1: The clean spot on the engine cover where the foam seal on the splitter makes contact. Image 2: The foam on the splitter. I'm pretty sure it's there for a reason. Image 3: Notice how the engine cover takes up the ever-increasing gap between the splitter and TMIC as you go from the back towards the front of the car. That is >1" easily. Image 4: Rao, I didn't see any signs of my heater hose coming in contact with the shock tower, but that little cover had worn a nice little spot through the paint! Will have to take steps to fix that this spring. The Crimson Dynamo Link to comment Share on other sites More sharing options...
05GT Guru Posted February 4, 2009 Share Posted February 4, 2009 Put it on a dyno with and w/out and there will be no hp difference Link to comment Share on other sites More sharing options...
Underdog Posted February 4, 2009 Share Posted February 4, 2009 *yawn* well i guess if it doesn't show up on a dyno chart then there is no reason for it! Might as well get rid of the suspension, brakes, glass, paint, HVAC... The Crimson Dynamo Link to comment Share on other sites More sharing options...
GTTuner Posted February 4, 2009 Share Posted February 4, 2009 It has a function as long as there is a top mount intercooler there. Without the cover the air can bypass and flow around the IC. The cover seals the IC to the hood scoop so the air has nowhere to go but through the core. Link to comment Share on other sites More sharing options...
rao Posted February 4, 2009 Share Posted February 4, 2009 Image 4: Rao, I didn't see any signs of my heater hose coming in contact with the shock tower, but that little cover had worn a nice little spot through the paint! Will have to take steps to fix that this spring. It is not the heater hose, it is the fuel lines rattling. I wrapped some heater hose around the fuel line to stop the rattle. As for the rest, you guys enjoy arguing Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
GTTuner Posted February 4, 2009 Share Posted February 4, 2009 *yawn* well i guess if it doesn't show up on a dyno chart then there is no reason for it! Might as well get rid of the suspension, brakes, glass, paint, HVAC... Most dynos are not traveling 60 mph down the road either. Trust me, I installed my Perrin TM and tested the surface temp of the core with and without the cover......it was always colder with the cover in place. Link to comment Share on other sites More sharing options...
Underdog Posted February 4, 2009 Share Posted February 4, 2009 Yes... that was sarcasm directed at the Guru. The Crimson Dynamo Link to comment Share on other sites More sharing options...
05GT Guru Posted February 4, 2009 Share Posted February 4, 2009 I understand that dyno nubmers dont mean much, but you have no way of proving that it actually does do something do you? Other than saying it does. You right dynos dont simulate 60mph down the road, but when do you get the worst heat soak? When you not moving through the air fast. Link to comment Share on other sites More sharing options...
Underdog Posted February 4, 2009 Share Posted February 4, 2009 First, consider GTTuner's real life experiences and measurements. Second, (and this is in no way an attempt at showing off) I am a mechanical engineer who intuitively understands the reasons why the professional automotive engineers at Subaru made this decision. Also, I have pictures to back up my thinking and reasoning. GTTuners measurements lends credibility to the only rational hypothesis. You are the one saying it's useless without any evidence. Better yet, you made the baseless claim that it wouldn't show up on a dyno and therefore isn't necessary, yet you acknowledge that a dyno isn't the be-all and end-all measure of performance. The Crimson Dynamo Link to comment Share on other sites More sharing options...
05GT Guru Posted February 4, 2009 Share Posted February 4, 2009 Like i said you right the dyno isnt the end all be all measurement. But you havent shown any real evidence to prove your right, you have some measurements, ok they arent measuring the air temp to see if it actually is cooler with the cover on, so they show nothing reguarding our dispute. Link to comment Share on other sites More sharing options...
rao Posted February 4, 2009 Share Posted February 4, 2009 Engine cover wars!!!!!!!!! Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
05GT Guru Posted February 4, 2009 Share Posted February 4, 2009 Engine cover wars!!!!!!!!! LOL, im not trying to say hes wrong as i have no real proof that im right, all im asking for is some real results if someone is 100% sure they are right which he seems like he is i wuld think they would have something proving there thinking. There were soo many dicusions on the f-body forums abotu if ram air v non ram air added power. They even compared sealed ram air setups to non ram air at simulated speeds up to 70mph and the biggest diff they got was 1.2hp all the others were less. I know thats trying to feed air into the intake and this is trying to cool a intercooler but its simular setup. Link to comment Share on other sites More sharing options...
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