Coolant temp increase after "YooHoo" Belt install
 

So after some time of having a slipping belt i decided i would buy a yoohoo belt from pinnapple racing. Well that one blew on me. so i looked into other belts and came across the napa belt part number 3L220.

People have said this to work.

Before hand even with the slipping belt my coolant temps were usually on the fairly low side.

Now after i have installed the napa belt i have noticed more often then not that the temps are a bit higher than before.

For the most part the needle sits almost straight down on the temp gauge.

Can anyone give me some suggestions as what the culprit might be.

thanks in advance.

How tight is the belt? How do you drive the car?

I have a Pineapple belt on mine for 3+ years so far.

That's because only yahoos run yoohoos... Not one race team in the US runs a yoohoo... Buy the good gates belt and properly tighten it and it won't slip. Mine doesn't slip at 8000rpm on the dyno, your's shouldn't either. Get a dual belt pulley and do it right if you want reassurance.

What I did is I gutted the air pump and used the stock size belt. This enables me to tension the belt properly and allows for some manufacturing slop in the belt, which will happen.

I would suggest this method, or if it bugs you, try to obtain a tensioning pulley.

A dual pulley won't fully solve the issue because one belt will always be slightly more loose than the other. The dissimilarities in belt length due to manufacturing cause this issue. Even Gates belts have given me some troubles.

If you have a weber carb, you'll have to hack at the airpump to get it to fit. Otherwise, it should work out fine. The air pump hardly weighs anything with it gutted.

Just some thoughts...It didn't cost me anything to do it this way and I didn't have a hard time getting the belt on either. My coolant temps after letting the car idle stationary for about an hour was consistently 1/2 way. With some air moving over the radiator it drops.

It could also be a coincidence...Maybe your fan clutch is going bad? Maybe you did something at the same time that caused your engine to run hot?

The times I've needed a yoohoo belt or dual belts was because my fan clutch was locking up due to failure/in the process of failing. After swap to another fan I could run a single belt with no slipping and cool running.

electric fan FTW!

electric fans are over rated!

in fact you may want it to slip a little @8000....

When you use "dual" belts you get a "Matched" set of belts. However in the over 20 plus years of having these cars I have never had slippage with a single belt when I was not running the Air pump.



[quote=whistlepig87;10185710]

A dual pulley won't fully solve the issue because one belt will always be slightly more loose than the other. The dissimilarities in belt length due to manufacturing cause this issue. Even Gates belts have given me some troubles.

Nope, not a worry. I'm running an under drive pulley.

Not picking at nits here, but this yahoo drove the 12ish miles home on just the
yoohoo belt when the alternator belt snapped on me. I am 95% sure if I had dual
belts I would have taken them both out.


To each their own/more ways to skin a cat/etc :)

pffbt.. It's a 7 i drove from Tukwila, WA to West Seattle, WA with no belts at all... on this engine. yup the one that still makes 190whp. remember majority of the engines cooling is through the oil cooler.

OK, so I guess a dual pulley is perfectly fine...I've bought plenty of "matching" gates V belts to be used on a dual pulley drive system on a welding positioner at work and they never were exactly matching, but if this works out for you guys, all the power to you. I was just offering a reasonable alternative that wouldn't cost anything. Lots of things will work, do what you think is best!

If they were true "Matching cut numbers" as indicated by the "exact" number on the belts. Then you had a issue with your equipment, not the belts. :nod:

Alright man whatever you say. You are right.

he is...

Yep, I sent him an email about it...I was splitting hairs on an issue I encountered in an industrial setting that really doesn't apply to automotive issues. +- 1/16th of an inch in belt cuts isn't a big deal for an alternator drive, but it is for what I encountered. I implemented my method based on experience in another engineered setting, and comparing apples to oranges just doesn't apply here.

Dual alt/water pump belts for the win. One will slip more than the other since the alt angles upwards. Nothing to worry about and you always have a spare belt.....installed!