What weight antifreeze?

[sharptalk]

I need to refill my tank as the engine runs hot and I am almost empty. What weight and brand of antifreeze should I use for my 1987 345 with a Chevy 454 engine?

[ALANSD]

That should take regular off the shelf Prestone recomended for GM. I used that and added a can of super coolant from NAPA. It dropped my summer operating temps to a lower level. Even in 100 degree heat.

It is a good idea to check the thermostat and to backflush the system if you can. There are easy back flush attachments you can put into the heater hoses, also form Prestone.

[sharptalk]

Thank you for your help!

[Naper]

Mix 50% with clean water

[345bill]

Is your water tank low regularly? Might also be a good time to check for leaks.

[sharptalk]

Originally Posted by 345bill

Is your water tank low regularly? Might also be a good time to check for leaks.

New radiator in Fall 2009. Only use it to go back and forth to the repair shop. LOL!

[Aage]

Originally Posted by sharptalk

Only use it to go back and forth to the repair shop. LOL!

That's a good one!!

[Ahab]

Originally Posted by sharptalk

I need to refill my tank as the engine runs hot and I am almost empty. What weight and brand of antifreeze should I use for my 1987 345 with a Chevy 454 engine?

Try 10w-30.

[sharptalk]

Originally Posted by Ahab

Try 10w-30.

Do you know anyone in Phoenix that works on mid weight trucks?

[ScrapIrony-2]

There's a great guy in Tucson, if yer radiator can handle the trip...AZ Mobile Mechanic...his name is Tom, and if you want to try him, pm me, and I'll send you the particulars...mike
Just noticed this was post 454, and we have one...!!!