supra head gasket questions+ rebuild

Bill UK · 04-25-2008, 09:08 PM

Vacuum Solenoid Valve: part of the EGR unit (Exhaust Gas Recirculation) as it says on the label, it recirculates a percentage of the exhaust gas back into the inlet manifold. All to do with lowing exhaust emissions, some UK members have removed theirs, as you probably know vehicles registered before 1992 in the UK are allowed a higher Nitrogen Oxides emission levels that’s also why many remove their cats.
Back to your pipes, I would suggest you replace the ones that are difficult to get at and look inexpensive, there are a couple of small 90? elbows one on the exhaust side rear of the head and one at the front just behind the thermostat housing. How does that large turbo concertina pipe look ?, the one that fits to inlet side of the turbo with a few pipe coming off of it.

EGR UNIT

04-25-2008, 09:08 PM	#59
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	Vacuum Solenoid Valve: part of the EGR unit (Exhaust Gas Recirculation) as it says on the label, it recirculates a percentage of the exhaust gas back into the inlet manifold. All to do with lowing exhaust emissions, some UK members have removed theirs, as you probably know vehicles registered before 1992 in the UK are allowed a higher Nitrogen Oxides emission levels that’s also why many remove their cats. Back to your pipes, I would suggest you replace the ones that are difficult to get at and look inexpensive, there are a couple of small 90? elbows one on the exhaust side rear of the head and one at the front just behind the thermostat housing. How does that large turbo concertina pipe look ?, the one that fits to inlet side of the turbo with a few pipe coming off of it. EGR UNIT