rad heat issue

[hammered]

Hey guys:

Hoping you might be able to answer the ?s here.

My 2f is running a 3 core rad.
Runs about 80-85'c on the flat road. (norm)
Climbs up to about 95'-100' when hill climbing in 85'f / 30'c here.
Steep hill here to my house. 2000' climb on a 40' slope.

When I shut down the block starts heating up big time.
I have a remote fan and have to keep this on for about 10-15 minutes till the temp drops back down to oper. temp again.
I fire it up once and circulate the coolant and it drops back down.

This is a good motor and I don't want to bugger it up here.
only has a 145 thousand klms. on it.

Not sure if the 15' temp climb is normal once you shut down???
I don't recall it doing this before around town.

The temp will climb 15'C after I run for more than an hour on the road.
As far as I can see I am boarder line on loosing a head gasket of messing something up here.

This was normal after doing long runs.
After 3 hours of driving I would have open the hood put on the remote elec. fan and cool it.
I was also is smoking hot beach areas.

It now seems to be a daily thing even after short drives.

Pulled the thermostat to see if this would help.
No diff.

Running on LPG and had it scanned to make sure it wasn't too lean. Checked out perfect. The tecs. said they couldn't get it any closer
Have tried reg gas and still the same.

I have noticed I am popping on the way down the hill these days.
Might have the timing to far advanced, but it is burning perfect according to the emissions tecs. at the LPG. shop.

A rad here will cost me 500 bucks and hate to find out it isn't the problem.
I have flushed it with some sort of gunk cleaning product to see if this would help also new coolant.
No difference.

Been awhile since I adjusted the valves.
Would this have something to do with it?

The advance in the distributor. might be shot.
Seems to need lots of vac. to advance last time I checked.

Like I mentioned above.
It is hot here these days.
90' 30'C norm in the daytime.

Any suggestions and feedback on if it is norm for the motor to heat up after turning it off would be great.

any suggestions and feed back always appreciated.

Have to do a big road trip soon and want to fix this asap or maybe it is just normal and I never noticed.

 

[dgangle]

It is completely normal for an engine's coolant temperature to increase once shut off as there is no waterpump rotation/flow. The temperature sender is located in the head so operating an eclectic fan on the radiator (with the engine shut off) in my reasoning and experience will do nothing to drop the engine temp, only the radiator temp which isn't being measured. The coolant temp will drop rapidly when the engine is restarted soon thereafter.

My SBC will climb to ~230F (110C) when shut off and drop to 180-190 (82-87C) within 10-15 seconds after restarting.

Considering the ambient temperatures you are dealing with, I would not consider the temps you call out excessive unless these have increased rapidly lately indicating something amiss in your cooling system. You know your truck better than anyone else so is this pattern new?

You may want to consider purchasing a larger 4-core radiator. There are several vendors that offer these for ~$200 US delivered. Are you telling me the shipping is 1.5X the cost of the product? I think you need to shop around.

 

[hammered]

Thanks for the input on this Gangle.

This is something new though.
It started about 3 months ago.

Wouldn't heat up much on the uphill climb before.
I am running bigger tires now 10' rims and 12.5 tires.
Just thought of this.
Maybe this is causing more drag.
I also have them toed in about 1.5 cm.
It is about the time the temps started to climb on me.

As for the rad.
$500 is about standard here for a 4 core bronze / copper rad.
Anything imported in to this country is 2xs+ the normal price we get it for in the USA.
I think I will hold off on the rad for now.

Will go change out my vac. advance, check the timing and do the valves this morning before I start work.

Start work at noon today.


Thanks again.

 

[Degnol]

That is a huge amount of toe-in, even for those tires. I think 1/4" is about max.

I have the same problem with my 3-core OEM. Runs right at 185* doing anything, in any temp, up to 65mph, then the faster I go the hotter it gets and tops out about 210*
Ordered a new 4-core from Radiator Barn for $200.....but I have not installed it yet

 

[hammered]

I am off to the rad shop this morning.
Got a lead on a 4 core copper rad.
The guy bought some Gov surplus and has a rad for me for about 200.

This should solve the problem.

changed the toe in yesterday.
1/4'' now.

Will be interesting to see how it rides on the hwy now.

thanks for tips and temps.

Steve