how hot is the egr supposed to get?

[97ranger11]

Chasing down vacuum leaks I found my egr has been getting zero vacuum for who knows how long. I replaced the solenoid and vacuum line going to it and the egr and now get up to maybe 3in hg under heavy engine vacuum briefly. I'm not sure if that's enough vacuum or my egr is working as it never gets over 120 degrees. Went for a drive yesterday and checked thebintake manifold was 110F and egr valve 120F.

It's supposed to get hot right?

 

[cbxer55]

It's exhaust. Exhaust near the outlets is 1800 degrees. Yes, Hot!

Too funny. one day at work, some knucklehead decided to sit on my 2006 Suzuki M109R, without asking me. He then said ouch, when he burned his leg on the two-into-one header. "Why is that so hot/" DUH!!

 

[97ranger11]

It's exhaust. Exhaust near the outlets is 1800 degrees. Yes, Hot!

Too funny. one day at work, some knucklehead decided to sit on my 2006 Suzuki M109R, without asking me. He then said ouch, when he burned his leg on the two-into-one header. "Why is that so hot/" DUH!! View attachment 91848

Yeah I just wasn't sure how much exhaust it actually let's through. Do you know what the vacuum should look like at the egr?

 

[RonD]

0 vacuum at EGR until engine is fully warmed up, and after that its only used when accelerating or higher cruising speeds

EGRs purpose is to lower cylinder temps to reduce the production of NOx gases, a toxic gas
NOx goes up when engine is under a load, i.e. accelerating and, cruising at higher speeds
The computer has software to calculate "load", and each engine model will of course have different parameters

EGR system is also monitored because it is an emissions system, so there WILL BE codes if there is even the slightest hint of a problem
DPFE sensor codes are common because this sensor does get fouled by water vapor in the exhaust

 

[Bill]

It's exhaust. Exhaust near the outlets is 1800 degrees. Yes, Hot!

That's hot enough to melt iron and aluminium.