Help controlling engine temp

Background:

The truck has a 472 that has been tested and tuned on the dyno so no lean spots, I run a Snow Performance water/methanol plate and the truck is a blast to drive.....................except when you get on it. The temperature gauge starts to climb quickly; it has a new 3 core aluminum rad, Mark VIII fan and Weiand high volume water pump with 180 degree thermostat. It's been burped, threatened and talked to sweetly but no luck. I would appreciate any ideas. Thanks.

Insufficient timing

bigblok2000ranger wrote:Insufficient timing

I'll give it a bump, timing is locked and since it was last year when last I checked I don't know at what. I'll see what happens and let you know.

Building heat with power, radiator..... not enough water. Most hi performance radiators are two flat tubes ranging from 1/2 to 1" accross with some substantial tanks. The "stock" replacement radiators in 2 and 3 row are adaquate for "stock" engines.

Could possibly be water moving to quickly thru the system. Also is the electic fan your only fan? does the water pump have the proper backing plate?

lghting94 wrote:Could possibly be water moving to quickly thru the system. Also is the electic fan your only fan? does the water pump have the proper backing plate?

The Mark VIII is the only fan but should be more than up to the task (properly wired with relays for both speeds off temp. probe), the water pump also has the proper backing plate. Haven't bumped the timing yet, I also need to get more hours in a day.

Check your lower radiator hose to make sure it ain't collapsing.

bigblok2000ranger wrote:Check your lower radiator hose to make sure it ain't collapsing.

Funny you should say that as I was looking at a Nelson racing video with a 14-71 feeding a big block (the other kind), every time they whacked the throttle (on the dyno) you could see the lower rad hose collapse. I'm going to mount the Go-Pro so I can see what's happening with mine.

I miss my old 77'. Nice looking ride!

be sure spring is in lower radiator hose

X3, without a spring in the lower hose it will be sucked shut, mine did exactly that. An external oil cooler helps too, especially if your only running a small pan, say 5 or 6 qts, an additional 2 qts and a way to dump that heat really helps.

77f150 wrote:

lghting94 wrote:Could possibly be water moving to quickly thru the system. Also is the electic fan your only fan? does the water pump have the proper backing plate?

The Mark VIII is the only fan but should be more than up to the task (properly wired with relays for both speeds off temp. probe), the water pump also has the proper backing plate. Haven't bumped the timing yet, I also need to get more hours in a day.

IMO that fans not meant for big HP....... Get a better fan if the timing thing doesn't help.

Thank-you very much for your input gentleman, this is my loud ill tempered toy and I don't in any way claim the experience or skill found here. This past week-end I finally had a day off and jumped in the truck to head to a friends shop, press the starter and heard a god awful sound as it started (Powermaster Ultra Torque starter died). Will be rebuilding it and selling it and putting a '95 F250 starter in it. Checked the hoses and the lower one has a spring but feels way to soft and can be almost squeezed shut without effort. Ordered a stainless flex hose. Once I get everything back together I'll double check the timing. I have a pretty deep oil pan (off a dumptruck) and an oil cooler. I love this stupid truck as it's a blast to drive.

Is the airflow to the rad ducted so that it cant escape around the sides. If it builds heat under power sounds like the air could be going around your rad and not through it as it will take the path of least resistance.
Just a thought.

Update!

Not a lot to update just yet, got her home with my old starter. Waiting on the hoses from Summit which should be here within the week, have the new starter sitting here. While I was stuck on the lift I hit the frame with a grinder and flapper wheel and then gave it some POR15. As soon as the hoses arrive I'm back up to my friends shop for the hose and starter swap, check the timing and then a few blasts to see what the temperature gauge does:

This is when the starter gave up the ghost:



Not the best shot but it shows the rad and the engine and trans oil coolers in front:



Work finally winds down at the end of this week, my class goes for their final simulator exams to get certified and when you spend years getting them there you're invested in their outcome. As soon as I get everything swapped and make some runs I'll update. Thank-you again for all the help, your willingness to share is really appreciated.

No wonder the thing runs hot . It has flames coming out from under it!

Well the cooling problem has been solved. Checked the timing and numerous other items but when up on the hoist I grabbed the lower rad hose and couldn't believe how soft it was, it had a spring but even with that it would collapse with little effort. New hoses and a fill and burp and she stays rock steady on the hottest day. Went to visit my daughter (2.5 hrs away) during 30+ degree weather and the truck ran great.......I think I forever damaged a family in a Prius I was idling beside though  

Glad you got it fixed. Good info to store away.  

[quote="dfree383IMO that fans not meant for big HP....... Get a better fan if the timing thing doesn't help.[/quote]

Dave,have you ever seen a Markv111 fan blow air? That thing is a beast. imo,if that fan won't cool one down,then it's not the problem.

Glad you found the problem.