omgwizards

Hi all, quick question about exhaust manifold temps, sorry if it's obvious. So I think everything is fine. 1978 XC 250 crossflow. Today I was just idling the car in 5 minute intervals and doing coolant flushing. Car's working as expected. I've chased down as many intake vacuum leaks as possible. My question is, is it ok if the rear of the manifold is 250 - 350C and the front of the exhaust manifold is 90 - 110C? I'm guessing that what I'm seeing is the effect of the fan blowing on the front. Other temps seemed ok, after 5 or so minutes the block was about 50 - 70C and the coolant was 45 - 65C. Thanks! Sent from my SM-F936B using Tapatalk

Stay positive, that looks dirty but I wouldn't throw out a working radiator because of that. I'd definitely give the whole system a flush and get new hoses though. It sounds like you may need new fuel line and new coolant hoses, pretty normal maintenance things. Another member on these forums got a fuel pump rebuild kit from Auto Surplus in Victoria, and they posted a pic of their cleaned and rebuilt fuel pump back in 2021. You may be heading in a similar direction if your pump isn't working perfectly. Sent from my SM-F936B using Tapatalk

Are you testing flow with positive pressure? Because the line flows using suction. Could the suction be collapsing the line somewhere? Sent from my SM-F936B using Tapatalk

How did it go? I'll probably be in a similar situation soon (Crossflow with carby - works fine when using a jerry can, but soon to be reconnecting gas tank) So I'm thinking, try a fuel pressure gauge at various places along the line. A working fuel pump provides 24 - 35 kPa at idle. Between the fuel tank and the fuel pump there needs to be negative pressure. If there is a leak or a blockage you'll see a change in pressure on either side.

I've definitely seen lots of engine bays using a hose clamp. I still find it odd that the exhaust pressure doesn't blow the hose off, but maybe I'm thinking of turbos and backpressure which isn't all that much of an issue with a stock crossflow Sent from my SM-F936B using Tapatalk

Thanks! Sent from my SM-F936B using Tapatalk

Hi, silly question, I know. Also, not my engine bay in the photo I've got a 250 Crossflow in a 1978 XC Falcon Attached is photo of original item from Ford, but I was going to go a cheap option using whatever I can find from a wrecker or auto store. I suspect it's safe, but is there anything I need to consider if sourcing some random metal hose & hose clamps to use? Sent from my SM-F936B using Tapatalk