...and like that, it's down (1 Viewer)

[ANGLICO0861]

Alright, compression test was fine. Also had a hydrocarbon test on the coolant which was negative. I think we can reasonably rule out head gasket. I am going to go ahead and replace the radiator and thermostat while I am at it. Starting to chase down if there is a vaccum leak and looking at mixture settings.

 

[Stumpalama]

compression test was fine. Also had a hydrocarbon test on the coolant which was negative. I think we can reasonably rule out head gasket. I am going to go ahead and replace the radiator and thermostat while I am at it. Starting to chase down if there is a vaccum leak and

I HIGHLY recommend doing the H20 pump while you've got everything out of the front. It is a relatively inexpensive, but critical, piece. It would be a shame to go through all that work to pull the rad and put it back, only to have the pump go bad a short time later.

 

[OTRAMM]

I HIGHLY recommend doing the H20 pump while you've got everything out of the front. It is a relatively inexpensive, but critical, piece. It would be a shame to go through all that work to pull the rad and put it back, only to have the pump go bad a short time later.

The only con to this is that decent water pumps are becoming hard to find. Most of the ones available now are garbage. It'd suck to replace a decently healthy Japanese water pump with a crappy Chinese one.

 

[ANGLICO0861]

I HIGHLY recommend doing the H20 pump while you've got everything out of the front. It is a relatively inexpensive, but critical, piece. It would be a shame to go through all that work to pull the rad and put it back, only to have the pump go bad a short time later.

Yep sorry, have an oem water pump from cruiser outfitters on the way also.

 

[ANGLICO0861]

Yep sorry, have an oem water pump from cruiser outfitters on the way also.

Just checked the invoice it is an aisin aftermarket. No good?

 

[jcj_78FJ40]

When I tried to get an OEM pump for my 40 a few years ago, Beno said it was no longer available and referred me to cruiser outfitters.

No issues with mine.

 

[Stumpalama]

The only con to this is that decent water pumps are becoming hard to find. Most of the ones available now are garbage. It'd suck to replace a decently healthy Japanese water pump with a crappy Chinese one.

Get a made in japan/Taiwan one? I'm sure there are high quality ones still available.

 

[Stumpalama]

Just checked the invoice it is an aisin aftermarket. No good?

When was it installed?

 

[Stumpalama]

Yep sorry, have an oem water pump from cruiser outfitters on the way also.

Aisan remanned are good.

 

[Jakes40]

My Aisin on my F is going strong after 4 or 5 years.

 

[OTRAMM]

Aisins are the good ones. Parts house branded seem to be the worst, GMB is somewhere in between.

 

[ANGLICO0861]

Sorry I couldn't make the meeting tonight, I am packing up the house.

I wanted to give an update on this issue in case anyone else experiences something similar. After replacing the entire cooling system, the truck runs with a bit hotter all the time, but now does not overheat. Prior to the work, my temp would sit at about 1/3 from cool. Anything around town would be fine, but after 5 miles or so at highway speed would overheat and do so not gradually. After replacing the radiator, water pump, thermostat, housing and all hoses- it now runs right in the middle of the temp gauge, but it is rock solid on the highway. None of the components that were pulled visually looked damaged, and I couldn't isolate exactly which part or combination was the source of the problem. All parts were replaced with factory or aisin remanufactured.

Thanks for everyone's responses and help.

 

[Stumpalama]

Probably restricted flow or deposits lining the tubes in the rad...
When cooling was needed, it couldn't keep up.

 

[Stumpalama]

Cut the rad open

 

[ANGLICO0861]

Cut the rad open

I sent the old one out to have it re-cored. I have an oem rad in there now, but for a 40 w/o Air Con. Had to buy some cheap brackets from Home Depot, but it will work until the original comes back. Once they open up the old one, I will update- but I have a strong feeling that was the issue.

If someone is pulling a 40 out of long term storage- may want to just go ahead and replace the radiator straight away.