LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Pcv hose

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Old 02-11-16, 08:10 PM
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EazyRice1
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Default Pcv hose

My Pcv hose is cracked and was wondering if I could use a heater hose. If so, what size would I need? Thanks in advance for the help. Oh and by the way I have 95.
Old 02-11-16, 10:44 PM
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isfdude
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No a heater hose will crack or swell in no time. PCV hose is molded with a special blend to resist oil for awhile.
Old 02-12-16, 01:43 AM
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Losiracer2
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i went to a parts store and found a molded hose in a similar shape to the PCV hose that I used, so it wouldn't collapse.

Lexus wanted 40 bucks or something rediculous, i picked this one up for 8 at Autozone. Looks identical to the OE one.
Old 02-12-16, 05:41 AM
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python
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Originally Posted by Losiracer2
i went to a parts store and found a molded hose in a similar shape to the PCV hose that I used, so it wouldn't collapse.

Lexus wanted 40 bucks or something rediculous, i picked this one up for 8 at Autozone. Looks identical to the OE one.
what kind of molded hose? coolant/heater? fuel? i bought my pcv valve..grommet and hose from the dealer and it wasnt all that much.
Old 02-12-16, 12:36 PM
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EazyRice1
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Originally Posted by Losiracer2
i went to a parts store and found a molded hose in a similar shape to the PCV hose that I used, so it wouldn't collapse.

Lexus wanted 40 bucks or something rediculous, i picked this one up for 8 at Autozone. Looks identical to the OE one.
Was this hose on the shelf or did you ask for it? Also, have the same questions as python.
Old 02-12-16, 08:49 PM
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Yamae
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I used a genuine one after noticing the unusual intermittent noise from the cracked PCV hose. Many PCV hoses are covered with the heat insulator to prevent the icing. Without it, there would be a problem like this below. See the 3rd photo from the top.
http://blogs.yahoo.co.jp/hot20vpow/60279077.html

People often don't believe the icing problem, but it's common here in winter.
Attached Thumbnails Pcv hose-pcv-hose-cracked.jpg  
Old 02-12-16, 11:28 PM
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No mention of LS400 here maybe move it to car chat like my post was?
Old 02-13-16, 11:19 AM
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oldskewel
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Originally Posted by isfdude
No a heater hose will crack or swell in no time. PCV hose is molded with a special blend to resist oil for awhile.
Yes, this is the sort of info you need to know when replacing hoses with non-OE ones. Of course the inner diameter should match, first. Hoses will have specs for pressure, temperature, and chemical resistance (oil vs. fuel vs. vapor etc.) among other things. Also insulation, abrasion resistance, and sometimes the shape (bend) can be important so it does not close itself off.

Make sure you have all that covered and you'll be fine. I think the main reason the custom manufactured and stocked OE hoses cost so much is because of the cost of stocking many individual items vs. by-the-foot stuff on reels.
Old 02-13-16, 12:41 PM
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Originally Posted by oldskewel
Yes, this is the sort of info you need to know when replacing hoses with non-OE ones. Of course the inner diameter should match, first. Hoses will have specs for pressure, temperature, and chemical resistance (oil vs. fuel vs. vapor etc.) among other things. Also insulation, abrasion resistance, and sometimes the shape (bend) can be important so it does not close itself off.

Make sure you have all that covered and you'll be fine. I think the main reason the custom manufactured and stocked OE hoses cost so much is because of the cost of stocking many individual items vs. by-the-foot stuff on reels.
Thanks for the info.
Old 02-13-16, 12:44 PM
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Originally Posted by Yamae
I used a genuine one after noticing the unusual intermittent noise from the cracked PCV hose. Many PCV hoses are covered with the heat insulator to prevent the icing. Without it, there would be a problem like this below. See the 3rd photo from the top.
http://blogs.yahoo.co.jp/hot20vpow/60279077.html

People often don't believe the icing problem, but it's common here in winter.
Ewww!! Thanks for the info.
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