Coolant hose under intake
02-20-18, 11:21 AM
#1
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Coolant hose under intake
Hi guys I have a 1994 lexus es300. I just replaced my spark plugs without removing the manifold and now I noticed that there was a coolant leak under the manifold mainly on the driver side. Is there any other coolant hose line other than central coolant hose?
02-20-18, 11:34 AM
#2
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Depends on what you mean by "under the manifold". The bypass hose under the intake manifold is a common leak point on these engines see here 16261G in the diagram part # 16261-20010
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thatshtboxES300 (09-12-24)
02-20-18, 10:22 PM
#4
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That hose is for the hydraulic fan motor (driven by the power steering pump) so you don't have a coolant leak?
02-22-18, 08:36 PM
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Depends on what you mean by "under the manifold". The bypass hose under the intake manifold is a common leak point on these engines see here 16261G in the diagram part # 16261-20010
upon further inspection. You are right this is the one that’s leaking. Is there an easier way to replace this hose without taking out the intake manifold?
02-23-18, 07:09 AM
#6
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09-12-24, 05:07 PM
#9
thx for advice boutta start taking shi apart tomorrow
09-12-24, 05:10 PM
#10
Lexus Fanatic
Coolant hose is a straight forward repair, knock sensor code can be a huge pain and expensive. If you find the knock harness with heat damage it's probably fine just to replace it and leave the sensors alone, if not then you're looking at replacing both knock sensors. If you don't use OEM you will be doing the job twice. If you buy "OEM" from Amazon or Ebay you will probably be doing the job twice.
09-12-24, 05:40 PM
#11
Coolant hose is a straight forward repair, knock sensor code can be a huge pain and expensive. If you find the knock harness with heat damage it's probably fine just to replace it and leave the sensors alone, if not then you're looking at replacing both knock sensors. If you don't use OEM you will be doing the job twice. If you buy "OEM" from Amazon or Ebay you will probably be doing the job twice.
I very much appreciate the advice slightly new to working on this car I shall def take this seriously
09-13-24, 10:51 AM
#12
Driver School Candidate
Yes, all genuine Toyota parts under the manifold, including manifold gaskets. While you're in there, good time to replace the thermostat and gasket.
I have a 96 ES300, and I do all the repairs, but not paint and body. You can always get good advice here, but feel free to contact me about repair, etc. We share just about everything on the car. What state do you live in? I have the leather rear seat in excellent condition, lower and upper. Apologies for the sales pitch.
I have a 96 ES300, and I do all the repairs, but not paint and body. You can always get good advice here, but feel free to contact me about repair, etc. We share just about everything on the car. What state do you live in? I have the leather rear seat in excellent condition, lower and upper. Apologies for the sales pitch.
Last edited by bc1_2002; 09-13-24 at 11:16 AM. Reason: don't need comment on spark plugs
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