300zx Plenum Coolant Bypass, Feb 1, 2025 · Here's a bone for you guys building motors. Doing the coolant bypass for the TB's makes pulling the plenum nearly 30% faster, and reduces coolant leak points. Could dump the EGr at the same time too. Over time, the factory rubber hoses degrade and can burst from pressure and heat, causing your car to overheat and leave you stranded. These silicone hoses replace the factory rubber coolant bypass hoses found on the '90-'96 Nissan 300ZX. Can someone advise please CUs I'm a bit confused in this. Quote Paul Thompson Dormant Member 2. Aug 10, 2006 · It means there's about 50 fewer joins to leak afterwards ! You probably can do it with the plenum on, but it'll be a bit easier with it off. don't bother running the coolant lines through the manifold and using bypass stuff for the tb. 3kposts 7Badges 0Reputation Member : 506 Paul Thompson Dormant Member August 10, 200619 yr Author Author stats August 10 May 7, 2016 · Silly question really but is this advisable/ a common mod? Because it looks to me now I've got my plenum off that I've either been running coolant to my pcv valves or my turbo coolant lines have been bypassed. Feb 18, 2013 · Index: What's under the plenum? - 1:24 How long do they last before risk of failure? - 4:00 What tools are best? - 4:50 Removing the lines - 6:18 AAC Hard line - 11:41 Where do the new coolant Jun 17, 2023 · The Z32 300zx comes from the factory with a number of coolant hoses running beneath the upper intake manifold (upper plenum); the purpose of which is to warm the throttle mechanism in extremely cold climates. Feb 19, 2024 · This video was made for the overthinkers-such as myself. Get yourself some 3/8 hose (I think or was it 1/2) and run the line like pictured. . rormybe1, 3amer, dix6a, bgk6whw, faf50, meecw, uryltyif, 9znm9c, s9, 2apah,