Hi everyone,
My truck is giving me trouble, I've had it a while now and it always used to run at 1/2 on the temp guage. Recently I removed some EGR stuff on the truck, see the link below for more details:
viewtopic.php?f=29&t=1393The day after I removed the EGR stuff I flushed out the radiator with water, after flushing it out with water I drove to chch 50kms away appx on the highway I noticed the temp was only at 1/4 so I took the next exit, checked the radiator, the water was low, I topped it up and drove on, the temp never rose above 1/4 so I pulled over and checked the radiator again, it was still full.
I should state here that the radiator water has been rusty since I bought it and I want it sorted. I'd flushed the radiator with water several times before this temp issue arose.
A mechanic friend suggested rust had probably jammed in the thermostat holding it open (keeping the engine too cool) and that I should put cardboard in front of the radiator and heat the engine up to just over 1/2 (to dislodge the rust), I did this, as soon as I took the cardboard out the temp dropped back to 1/4.
So I replaced the thermostat, while the gasket sealer was curing I decided to take out the radiator and give it a good hose out, I did this, it ran dark brown, heaps of rusty water came out, not really big flakes but plenty of rust. I sent it to the local radiator guy for a good clean out, but he said it was shot, so I put a good second hand spare one in (I cleaned it heaps first, inside and out)
When I put it all back together with the new thermostat and much better radiator I took it for a decent drive, same issue again, only 1/4 temp on the guage. My mechanic friend was stumped, One of the EGR vac hoses (that went to the intake manifold valve blanked area) was producing a vacuum, so I blocked it. That didn't help either. We thought maybe the viscous fan was locked up all the time, keeping things too cool, it wasn't, when temp was at 1/4 with the engine running the fan could be stopped by hand.
Concerned the guage or sender was faulty today I bought a cool radiator cap that has a built in temperature guage! (old one the rubber was a bit perished) When the dash guage is showing 1/4 temp the temp at radiator is nearly 80C or about 170F that seems low to me, I thought the temp was supposed to be about 95C can anyone tell me what is right?
Cool radiator cap with temp guage.
PICT0393edit.JPG
Today was a warm day 25C upwards, I checked my heater while driving it seemed to pump out plenty of hot air.
I'm totally stumped, is it still safe to drive the truck until the issue is sorted? Is the problem likely cooling related or is it more likely EGR removal related?
Thanks heaps in advance.
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