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Rubber intake boots, how tight must they be?
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Patrick_S
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PostPosted: Sat Apr 14, 2018 6:58 am    Post subject: Rubber intake boots, how tight must they be? Reply with quote

Those 2 rubber boots on the intake manifold of the dual port 1600 engine, how tight should you tighten it down? I have trouble with I suspect a little bit of a vacuum leak. And today I took the intake manifold apart and I now notice good big tears in the rubber boots, they aren't even a year old, and German made. So I suppose I tightened then down too much. I also have original clamps for these boots. So, tight, very tight, just tight enough??
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gt1953
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PostPosted: Sat Apr 14, 2018 7:17 am    Post subject: Re: Rubber intake boots, how tight must they be? Reply with quote

Tight enough so they do not leak air into the manifold. That is what has worked for me.
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PostPosted: Sat Apr 14, 2018 7:27 am    Post subject: Re: Rubber intake boots, how tight must they be? Reply with quote

you may test for leak tightness by spraying a flammable carb cleaner spray at the boot when engine is at idle speed. doing so will cause a rpm change in the motor you may note as the carb cleaner is sucked into leaks, effecting the combustion mixture. this is a good test to do.

Bug On, with correct mixture!
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Volks Wagen
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PostPosted: Sat Apr 14, 2018 1:16 pm    Post subject: Re: Rubber intake boots, how tight must they be? Reply with quote

some of those clips cut into the rubber, so u could try padding them a bit. another thing is to treat the rubber to prolong it's life a bit. And if they tear, it's worth checking that all components of the intake are nicely tightened and not moving relative to one another.
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Patrick_S
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PostPosted: Sun Apr 15, 2018 10:20 am    Post subject: Re: Rubber intake boots, how tight must they be? Reply with quote

Ok thanks. I will give it another try going easy this time and check if they leak.
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