Hot hoses - blocked rad?

RobnKathryn · Post by **RobnKathryn** » Thu Sep 20, 2007 9:10 pm

After my engine swap and subsequent coolant fill and bleed, I'm not happy with the behaviour of the cooling system.
I haven't put any antifreeze in yet...just water until I know I'm not going to have to drain it again.

1.From cold the temp gauge reaches normal position very quickly..5 mins or so. Once there though it is stable.

2. After a 13 mile drive to work, the bottom rad hose is hot...not too hot to touch though, but the top rad hose is hotter still.

3. I can't remember the last time the radiator fans cut in.......they work when I disconnect the connector at the block so the fans themselves and the motors are ok but maybe there is a fault in the switching mechanism?

4. Having a good feel of the rad after a 13 mile drive, looking from the front the top left corner is very hot......the bottom left is hot, the middle top and bottom is hot, but the top right is cold and the bottom right is only just warm. Logic tells me that if the top and bottom hoses are both hot...then the whole rad should be hot. Does this mean it's partially blocked? I Radflushed it about 10 months ago. Do I have to spend out on a new rad do you think?

I have reluctantly decided to change the thermostat, and the rad, and top rad hose which is looking swollen and tired. But I'd be annoyed if the above symptoms were caused by air in the system.....what do you think?

haydn callow · Post by **haydn callow** » Thu Sep 20, 2007 9:29 pm

I doubt you have air in your rad. Just take the rad cap off and any air should bubble out. Sounds as though it is partially crudded up. The test is ..remove the rad. block off hose spigots. Fill with hot water, lay on side and feel all over.. It should all feel the same.

Yamaha · Post by **Yamaha** » Thu Sep 20, 2007 9:57 pm

"lay on side and feel all over.."

Aaah - memories of our Honeymoon there, Haydn!!!

Mike

alant54 · Post by **alant54** » Fri Sep 21, 2007 12:08 pm

Yamaha wrote:"lay on side and feel all over.."

Aaah - memories of our Honeymoon there, Haydn!!!

Mike

It's the vibrations from that quad that turns you on......

flippa · Post by **flippa** » Fri Sep 21, 2007 12:11 pm

Hi Rob and kathryn , i had this link you may want to have a look at there is a download for engines and heads it has a handy worksheet for fitting a re-con engine .i have followed your progress and know you are past this stage but the worksheet and checklist.... things to replace may help or re assure

good luck http://www.acdelco.com.au/acdelco_catalogues.htm

Socket Set Sue · Post by **Socket Set Sue** » Fri Sep 21, 2007 3:59 pm

Didn't I see on the Forum somewhere to clean out a radiator you blank the inlet and outlet and fill it with Coca-Cola and leave it overnight, worth a try I would say.

trevd01 · Post by **trevd01** » Fri Sep 21, 2007 6:33 pm

Yamaha wrote:"lay on side and feel all over.."

Aaah - memories of our Honeymoon there, Haydn!!!

Mike

You two married then?

haydn callow · Post by **haydn callow** » Fri Sep 21, 2007 6:56 pm

We've only met once, but I did feel there was somthing special. Then the truth came out. He only wanted a coolant alarm from me. Tut ! Men.

Hot hoses - blocked rad?

Hot hoses - blocked rad?

Rad Flush