The car I am about to buy has had an engine swap done recently. The seller said that it has some vacume leaks. Well, I guess they are called "leaks" because not all of the hoses are there.

Is there somewhere I can buy a full set of vacume hoses, if I am going to be doing this, I should probably go with the silicon braded ones.

Also, does someone have a write up of how to do the removal/installation. The car is an 87' TII.

Tim

 

silicon vaccuum hoses are expensive and not worth the money enless your dressing up your engine bay. Just get regular rubber hoses. You can pick em up at any autoparts store.

www.fc3s.org has a FSM downloadable courtesy of scott89tii

 

Go to an autozone and buy their HOSE KIT(RICE )

It is 15 dollars and comes in several colors. I have blue to match my car

Santiago

 

why do you say it is rice, because they are different colors? They have hose kits that will be exactly for a rx7?

Tim

 

I'm ordering red silicone hoses from Baker Precision (my 2nd order actually, ordered a small amount at first to see how they were). So far so good, and the prices aren't too bad. Quick response as well. I accidentally ordered blue on my 2nd order and they're exchanging it for red for me without any problems or hassles. Great customer service there! Here's an excerpt from FC3S-pro.com (when the site was working) regarding hose sizes and lengths needed in case you want to replace them all, or most:

The original OEM, stock vacuum hoses are black rubber. They're usually not a problem with vacuum hoses unless they have been removed before. One trouble area with vacuum hoses is the area above and around the turbocharger. This is due to the immense heat the turbocharger emits. Heat is what causes rubber vacuum hoses to harden. Once these vacuum hoses harden, they are very prone to breaking or leaking.

A very popular mod is to replace the rubber vacuum hoses with colorful silicone hoses. One advantage of silicone is that it keeps its flexibility, even with high heat, and it's self-lubricating. Although silicone is very resistant to heat, it can tolerate only occasional exposure to petroleum products, such as gasoline or oil - do not use silicone where constant exposure to either gasoline or oil is possible.

To replace all of the vacuum hoses under the engine, you need approximately:
30 feet of 4mm (~3/16")
10 feet of 6mm (~1/4")
2 feet of 10mm (~3/8") - upper intake manifold to brake booster

These estimates do not include the vacuum lines to and from the charcoal canister, various coolant lines, or fluid lines from the windshield wiper spray motor to the spray nozzles on the hood. Add additional amounts of hose if you're planning to replace these hoses as well. Silicone hose can handle being used as a low-pressure coolant hose.

For the most part, the silicone hose ends fit snugly and need no clamps to keep them secure. If you want to make sure they don't pop-off, you can add wire ties to these ends.

 

The stock rubber hoses have in most cases lasted 15 years or more. I have absolutely no problems replacing the old hoses with new rubber ones.

Personally I hate coloured hoses. They make the engine bay look cluttered and untidy because they stand out so much more than black hoses.

 

Unless going for making them stand out is what you're after

But you're absolutely right about the durability and dependability of the stock hoses!

 

Do you know if home depo has silicon hoses that are black. I heard they did.

Also white seven, these figures
Do you have a specific write up of how to do everything step by step? Or know of a site that has one? Thanks

Tim

 

You dont need a write up... Pull one hose off at a time replacing it with a new one.

 

Its just that not all of the vacuum hoses are on right now. Do you think I will have a problem?

Tim

 

Darkwaveboi has the site with the vacuum hose diagram just down load that and follow the picture

I have had the same problem with my 88 turbo II and it really helps to have your intake manifold off too when doing this

 

Mazdaformance.com sells a hose kit. It's listed somewhere on their website under one of the RX7 categories.

You can also buy silicone hose from hosetechniques.com. When I repalced my NA engine last year, I bought 16' of black (different colors are available) 3.5 mm silicone hose to replace all the small sized hose. Actually, 16' of hole didn't leave room for any mistakes. I'd suggest going with 20' of hose to be safe. I bought the large sized vacuum hoses from Mazda.

Hot_Dog
90 RX7 GXL
02 RSX-S

 

this hose kit at mazdaformance.com, is it for vacuum lines or for everything?

Tim