911uk

Coolant advice

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YOUR RESEARCHCoolant advice

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Replace every 2 years

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The silicates in the old coolants get used up hence they had to be replaced every 2 years.
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Coolant advice

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Leading evidence: 'Replace every 2 years' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace every 2 years' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Test (all ok)

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Performed · outcome unconfirmed · Original poster
pressure tested (all ok).
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Coolant advice

Use pink stuff

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Suggestion · Original poster
Now i'm sure i read a piece on a thread before saying its ok to mix the two different colours as they are OAT and HOAT (whatever that means) but is this ok to top up using the pink stuff?
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Coolant advice

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Replace every 2 years

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Performed · outcome unconfirmed
The silicates in the old coolants get used up hence they had to be replaced every 2 years.
Original post Read captured discussion
Coolant advice

Test (all ok)

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Reported fixes: 0
Unsuccessful attempts: 1
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Performed · outcome unconfirmed · Original poster
pressure tested (all ok).
Original post Read captured discussion
Coolant advice

Use pink stuff

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
Now i'm sure i read a piece on a thread before saying its ok to mix the two different colours as they are OAT and HOAT (whatever that means) but is this ok to top up using the pink stuff?
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Coolant advice

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5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

911uk: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

Just need a bit of clarification on topping up the coolant. I had the car in getting checked at OPC as the collant level was low about 2 months ago. Had them check and they said the front left return hose was sketchy so changed it. pressure tested (all ok). At this point they had refilled the system with a gold yellow colour coolant. On checking the coolant level the other day it was low and below the minimum level. I therefore topped it up with some H2O before purchasing a nice shiney bottle of coolant from Design 911 which comes and is pink. Now i'm sure i read a piece on a thread before saying its ok to mix the two different colours as they are OAT and HOAT (whatever that means) but is this ok to top up using the pink stuff? Also should the 1L of coolant i bought be diluted? Any help would be appreciatted. Cheers Mac

POST 2Original post

Hi just top up you, will find that it might take a day or two to expel any air from the system ,but do keep an eye out for any signs of obvious leaks just in case Mike

POST 3Original post

The original yellow coolant is an OAT one and so is the new pink one. OAT and HOAT ones tend to be compatible. It is when the OAT/HOAT coolants are mixed with the old pure silicate ones (they tend to be blue) that you get an adverse reaction resulting in a brownish sludge. The silicates in the old coolants get used up hence they had to be replaced every 2 years.

POST 4Original post

Here's an explanation on the different anti-freeze types..... hope it helps

POST 5 / ORIGINAL POSTEROriginal post

Thanks for the advice guys. :thumb: Appreciate your time. Mac

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