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370z engine blown

One vote for stock cats and peace of mind.

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Old 05-29-2012, 05:38 PM   #46 (permalink)
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One vote for stock cats and peace of mind.
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Old 05-29-2012, 05:50 PM   #47 (permalink)
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Just get LTH's and then you can't have a problem with the cats. That's got my vote.
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Old 05-30-2012, 08:39 AM   #48 (permalink)
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I know this can and has been an issue for pre-cats. How ever this is just impossible for a normal Cat. Yes there is some gas sucked back during overlap but you have 5 other cylinders one of which will be exhausting completely. So at most the exhaust pressure would be reduced but as for an over all back flow of the exhaust is just BS.

Your blown engine was due to other issues, the destroyed cat is unrelated. And more then likely all the oil burning clogged the cat up and exhaust pressure just ripped through the clog. But all this is difficult to prove hence why they are just replacing the engine.
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Old 05-30-2012, 10:23 AM   #49 (permalink)
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Quote:
Originally Posted by 2011 Nismo#91 View Post
I know this can and has been an issue for pre-cats. How ever this is just impossible for a normal Cat. Yes there is some gas sucked back during overlap but you have 5 other cylinders one of which will be exhausting completely. So at most the exhaust pressure would be reduced but as for an over all back flow of the exhaust is just BS.

Your blown engine was due to other issues, the destroyed cat is unrelated. And more then likely all the oil burning clogged the cat up and exhaust pressure just ripped through the clog. But all this is difficult to prove hence why they are just replacing the engine.
Isn't piping separate to the cat, with each cat seeing three cylinders?
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Old 05-30-2012, 09:59 PM   #50 (permalink)
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Quote:
Originally Posted by Fabsnoop View Post
Just went to the dealership to take a look at the broken HFC. The whole entire honey comb of the cat was broken off. It was just moving around freely. The tech at Nissan said "the only reason Nissan decided to replace the motor is because this motor is known for having oil consumption issues." I asked him if he was certain that the cat was the reason the engine failed..He said "it's one of the reasons.." I swear they'll never give you a for sure answer to anything. Should i go the test pipe route, have the hfc replaced (probably the worst idea since permanent viagra), or put the stock cats back on?
You're lucky he DIDN'T give you a "for sure answer". Shuffle back to the lobby and zip the lip, you just got a free engine even though the crap parts from Berk are what destroyed it. Go play the lotto.
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Old 05-30-2012, 11:58 PM   #51 (permalink)
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Quote:
Originally Posted by ImportConvert View Post
You're lucky he DIDN'T give you a "for sure answer". Shuffle back to the lobby and zip the lip, you just got a free engine even though the crap parts from Berk are what destroyed it. Go play the lotto.
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Old 05-31-2012, 12:41 AM   #52 (permalink)
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Until someone tears the engine down. You will never know what really happened the this engine! Talk all you want about it. It's all guessing for now.
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Old 05-31-2012, 09:07 AM   #53 (permalink)
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Quote:
Originally Posted by 2011 Nismo#91 View Post
Your blown engine was due to other issues, the destroyed cat is unrelated. And more then likely all the oil burning clogged the cat up and exhaust pressure just ripped through the clog.
This is the only scenario which makes any damn sense at all.
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Old 06-03-2012, 12:29 AM   #54 (permalink)
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Unless you go with test pipes, there are examples of all types and brands of catalytic converters failing, stock or not. In my opinion, the vast majority (myself included) have had nothing but great experiences with Berk HFCs.
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