5 replies to this topic

[scooby doo]

Hi all. Do you HAVE to use exhaust jointing paste ? If the two parts of the exhaust sleeve together quite nicely and are clamped, is this enough ?

[Northernpower]

There's a lot of pressure on the joint and if you don't you'll get some blow by no matter how tight you think you've sealed it. If you have a lambda fitted you'll definitely need to seal it otherwise it will affect the reading.

[Northernpower]

I use a high temperature exhaust silicone to allow for some flexing in the joint. Paste cracks when the engine rocks and moves the joint. Whichever seal you use, you need to leave it for 24 hours before starting the engine. This stops the sealant from being blown out of the joint before it has time to set.

Edited by Northernpower, 29 October 2016 - 03:22 PM.

[scooby doo]

ok  thanks for that good advice..exhaust silicon it is then !!!

[Midas Mk1]

I've never left it, in fact once on i get the exhaust nice and warm to allow the paste to cure.

If the cars not going to be started I use a heat gun on the localised area to cure the paste.

[Northernpower]

I've never left it, in fact once on i get the exhaust nice and warm to allow the paste to cure.

If the cars not going to be started I use a heat gun on the localised area to cure the paste.

Whatever works for you, I don't use paste on a sleeve joint where there's a chance of movement, I find silicone works better for me; it doesn't crack and doesn't need heat to cure it.