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Author Topic:   boiling hot
tommy13
Dirt Newbie

Total posts: 3
posted May 02, 2002 08:00 AM
350 motor in our pure stock over heating in the feature event.we can run the heat races without trouble,get to the main event and have to pull in the pits.last week we were running 3ed and moveing up when the gauge busted.we have resticted flow at the water neck..built huge fan shroud...any ideas what is is? some have said heads...timming...pullies PLEASE ANY ONE ELES HAVE EXPERIENCED THIS?

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01Winks
Dirt Newbie

Total posts: 4
posted May 02, 2002 08:53 AM
How old is your radiator? The tubes in the radiators swell up over time and restrict air flow. If it is over 2 years old you might want to look at replacing it. Also your water pump loses flow rate over time. We had the same problem last year with the mod. We replaced both and she runs fine now.

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Second place is nothing more than the first loser!!!!

01Winks
Dirt Newbie

Total posts: 4
posted May 02, 2002 09:01 AM
Just remembered a test-have the car running and put a shop rag flat against the front of the radiator. If the rag ***** up against the radiator you have adequate airflow.

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Second place is nothing more than the first loser!!!!

racer17j
Dirt Forum Champ
Total posts: 1565
posted May 02, 2002 10:59 AM UIN: 54865418
it could be a number of things that will cause this more info could help us pin point it like what do you run for a rad, cap,carb and jets ,timing , pullies ,fan.or something as simple as how much air is getting to the radiator even a stock grill could restrict the air you can get to it i alway just take my pics for the year and take the grill out

tommy13
Dirt Newbie

Total posts: 3
posted May 02, 2002 11:12 AM
we are runnig an alum. racing radiator that came with the car(could be old and worn out)we have a q-jet carb.the plastic nose that we put on the car has been cut so plenty of air can get to the raditor.we have a "shaker" screen between the nose and raditor to keep mud from plugging up.i think changing the waterpump and checking out the raditor is our next move.alot of people keep saying the heads or head gasket...there is no water in the oil.

ryan
Dirt Freak

Total posts: 430
posted May 02, 2002 12:24 PM
What size of restrictor are you using? Do you have duct work going to the nose piece from the radiator? Size of fan? Number of blades? What do you run for coolant? A thing to try that we always do is to make a air scoop that sticks out below the nose piece to force air up into the radiator

01Winks
Dirt Newbie

Total posts: 4
posted May 02, 2002 11:42 PM
If it is a racing type radiator and it is over two years old it is time to replace it. Try the shop rag test I talked about earlier and that will tell you the whole story I think. When you are running the heat races-does it gradually get warmer or does the temp stay the same-and-how many laps can you make before she really heats up?

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Second place is nothing more than the first loser!!!!

tommy13
Dirt Newbie

Total posts: 3
posted May 03, 2002 07:55 AM
HEY GUYS,YALL ARE ALL AWSOME WITH SOME GOOD ADVICE, BUT LAST NIGHT THE MECHINIC PULLED THE HEADS....CAN YOU BELIEVE BOTH HEAD GASKETS WERE BLOWN? WERE SURE THIS IS THE PROBLEM...SENT THE HEADS TO GET MILLED HOPEFULLY GET IT BACK TOGATHER FOR SAT. NIGHT.WILL KEEP YOU POSTED!! GOOD LUCK TO YOU GUYS THIS WEEK-END

racer17j
Dirt Forum Champ
Total posts: 1565
posted May 03, 2002 09:03 AM UIN: 54865418
i would still check out the pump and rad it may have been the reason it got hot and took out the gaskets

01Winks
Dirt Newbie

Total posts: 4
posted May 03, 2002 11:30 AM
Definitely check out the pump and radiator like racer17j said-there has to be a reason BOTH head gaskets went.

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Second place is nothing more than the first loser!!!!

ryan
Dirt Freak

Total posts: 430
posted May 03, 2002 01:33 PM
I agree with winks I can see if one of the head gaskets were out but both some thing else is going on. I would be checking out your coolant system while the heads are at the shop

[This message has been edited by ryan (edited May 03, 2002).]

Flatlander
Dirt Freak

Total posts: 310
posted May 03, 2002 02:54 PM
also your torque wrench and torque sequence andspecs

uforacing51
Dirt Freak

Total posts: 349
posted May 07, 2002 10:49 PM
Everyone should remember, One of the best tools to identify problems with engines that may involve the heads is a compresion check, I perform a check of all cylinders every other week.

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