Re: Exhaust manifold heat riser rebuild

Posted by jfrom@kanter On 2016/3/23 13:09:25

It is not unusual to have a bent heat riser shaft which then binds. When the shaft gets stuck due to age and corrosion, some mechanics hammer on the weight in the direction across the shaft thus bending it and binding it further. If you lube it with light oil/graphite mix while tapping on the open end and turning the weight with a wrench, little by little you can loosen it up.

When it's a bit loose and you can turn it, you can see the direction of the bend. Tap the weight against the direction of the bend until it is straight and rotates easily. They need rebuilding (rebushing) when exhaust blows out around the shaft.

Thanks
James From
Kanter Auto Products