Hi everyone. I'm new and I have a 71 240z with a L28 block / L24 head. Tonight while I was driving my fan and timing belt both snapped, and the coolant hose running from the radiator back through the firewall sprung a leak (I believe it's the hose running coolant to the heater or A/C).

Does anyone know the parts numbers or sizes for these belts & the coolant hose? I left my car in a safe place and will need to pick up parts tomorrow. I'd search more but after having pushed my car endlessly I'm seriously worn out.

Any help would be appreciated. Thank you.

Welcome to the forums.

First off, your engine doesn't have a timing belt, it has a timing chain. I assume you are referring to the FAN BELT that is attached at the engine crank pulley and drives the water pump and alternator. You may have a second belt that runs the air pump and if installed, the AC compressor.

It's possible that your water pump may have seized. It is a very simple bolt-on repair. You can confirm this by rotating the pump flange by hand. It should rotate freely. The part should be available at your local parts store. Same for the fan belt.

"The coolant hose running from the radiator back through the firewall"

The heater hoses that run through the firewall are attached to the engine, not the radiator. I believe these are generic 5/8" heater hose, no special part numbers. Just cut-off a small piece and bring it to the autoparts store.

Edited February 5, 201114 yr by Gary in NJ

If your heater hose is leaking, you can simply cut the leaking hose and move it out of the way. Then cut the good hose near the firewall and loop it to the connection that the bad hose was on. That will allow you to drive the car home, if your fixing things on the side of the road. You can see the two heater hoses in the picture below {well at least part of the two heater hoses} Or you can buy enough new heater hose at the parts store to form a loop in the engine bay. Make sure you can get the old clamps off, or pick up a couple new clamps.

Make sure you add water to the radiator!!! Take a gallon with you...

Changing the heater hoses at the heater core is something that you will want to have some time to do. It's a tight fit up under the dash - and a job best done in your driveway. You may want to order all three hoses from your Nissan Dealer. Two run to/from the engine and one connects the heater valve to the heater core. All three are preformed with fairly tight bends.

Heater Hoses to/from heater core

regulator 27118-N3300

Intake 27181-N3000

Output 27181-N3300

Edited February 5, 201114 yr by Carl Beck

Thus endeth the lesson about why changing all those thingies on an old car is a good thing..... unless of course one enjoys standing along side the road looking for a safe place to stash ones ride.

I know what you mean, when my mother told me i could have Dad's 77' Z, i spent a small fortune replacing all the belts and hoses before i felt safe driving it past walking distance :classic:

I know what you mean, when my mother told me i could have Dad's 77' Z, i spent a small fortune replacing all the belts and hoses before i felt safe driving it past walking distance :classic:

So even hoofing it in Alabama is no fun, huh? Could get smacked in the back of the head with a pick'm up truck mirror..... or worse.

If you loop the hoses to drive home, that's fine. However, do not keep the heater hoses looped! That creates a path of least resistance for the coolant which bypasses the radiator and will overheat your engine when driving hard. TonyD has engine dyno evidence of this over on HybridZ.

When you get home either (1) put in new heater hoses, I've done this but it was a PITA or (2) plug the heater hoses/connections at both ends.

I Looped the rear hoses for over a month straight, at over 90 degrees outside and hi RPM driving was involved on many days of that month. Never a problem. They were looped because the heater core failed on the freeway.

I'm not trying to be Arguementive by any means, but Every day driving and Dyno testing are almost 2 different things for most people. Dyno testing is the essencial idea of Racing in one spot. So for daily driving, looping it is fine.

Just speaking from experience,

Dave

Hi everyone. I'm new and I have a 71 240z with a L28 block / L24 head. Tonight while I was driving my fan and timing belt both snapped, and the coolant hose running from the radiator back through the firewall sprung a leak (I believe it's the hose running coolant to the heater or A/C).

Does anyone know the parts numbers or sizes for these belts & the coolant hose? I left my car in a safe place and will need to pick up parts tomorrow. I'd search more but after having pushed my car endlessly I'm seriously worn out.

Any help would be appreciated. Thank you.

If I were you, I'd replace ALL my belts and hoses, so that this doesn't happen again. As pointed out, heater hoses are generic. You can get the formed radiator hoses from your local auto supply. They can look them up on their computers. Just remember to tell them it's a NISSAN 280Z, as their computers won't have "Datsun." They might have to order the hoses in. It should take a day or two. They can also look up your belts, and they should have those in stock.

BTW, if you have an AutoZone in your area, you can use their website to find parts. You can register your car at www.autozone.com, and then when you do a parts search, you'll find parts specific to your car. Most auto parts stores can get you most routine items for your car. Just tell them year/make/model, and they'll find almost anything you need.

Edited February 5, 201114 yr by FastWoman

PS I saw you blog at hungry4power.com. Any relation to smokingwheels?

http://www.classiczcars.com/forums/showthread.php?t=18631

It's just unusual for a California car to be in such bad shape that you'd have so much rotten rubber ripping and flying on the same drive. I'd think it wouldn't have passed inspection in the first place.

Edited February 5, 201114 yr by FastWoman

There's the faint scent of 'troll/bot' in this thread.........

Thanks eveyone for your advice so far I purchased new belts and hoses today and have been working on the belts and will be doing the hoses next. Will update when things come together.