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Old 28-08-2013   #1
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Coolant bypass throttle body?

Does anyone have a guide or explanation for this?
It seems to be a regular mod but i dont seem to be able to find any info on it

I have a punto mk2b hgt 1.8
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Old 28-08-2013   #2
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Re: Coolant bypass throttle body?

Never seen it on an HGT.

The idea is that the water warms up the TB, helping vapourisation of the fuel. Can be helpful if petrol is lacking in anti-icing additives (unlikely now in the UK).

By passing it would possibly result in lumpier running from cold, or poorer economy on short trips.

I think folk do it just to make the plumbing neater -- all you need is some way of connecting the two ends up.
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Old 28-08-2013   #3
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Re: Coolant bypass throttle body?

I have seen it on a few mk2 hgts on different forums, im just wondering what they used to connect them.
I have had a look but want to avoid ordering like 5 before i get the right one.

Do you block the holes on the TB after removing them?
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Old 28-08-2013   #4
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Re: Coolant bypass throttle body?

It's not necessary.
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