Head gasket or something else?

[marek4792]

(03-09-2023 )schISM Wrote:  So I’ve never even laid eyes on an 870 but something in the previous posts didn’t quite add up. I found a diagram on quickserve of an 870 EGR circuit. It’s the same as an 871 so why wouldn’t you use a bypass tube after removing the cooler?

This diagram is wrong for the CM870, The EGR valve is attached directly to the exhaust manifold before the cooler.