I'm hunting a cooling system leak I have. The coolant will appear under teh intake manifold and on the fuel lines on the under body. Any Idea on how to figure out whats leaking?
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Coolant leaking near fuel lines
- Thread starter Silent Smith
- Start date
N
NDBoost
Guest
there is a coolant hose that goes from the block up through the lower intake mani into the throttle body, back out of the throttle body to the ISC and then from ISC to head.
SHould be a total of 3 hoses
Block > TB
TB > ISC
ISC > Head
check all 3
SHould be a total of 3 hoses
Block > TB
TB > ISC
ISC > Head
check all 3
N
NDBoost
Guest
you could but its to help startup emissions.. supposedly; If you do it loop it from block to head and just cap off ISC and TB
so basically aslong as its not fully capped off on the block, and re-routed to the head, it will be fine, and tb isc can just get caped? how many lines coming off the block just 1? and i think it may be a 1/4 hose
They are 5/16" hoses. The purpose is to heat the throttlebody and ISC valve for better engine operation when its cold.
Just yesterday a was looking closely at by-passing the throttlebody to get a little cooler intake air, to gain a bit more power.
I would strongly suggest connecting the in/out hoses on the block to keep the coolant flowing. Perhaps if you just cap off the block, you might create a hot spot in the block.
Just yesterday a was looking closely at by-passing the throttlebody to get a little cooler intake air, to gain a bit more power.
I would strongly suggest connecting the in/out hoses on the block to keep the coolant flowing. Perhaps if you just cap off the block, you might create a hot spot in the block.
I'm debating the rerouting as it'm driving it around in the cold, although come summer I'd take it off. Why heat anything if you don't have to specifically intake air...
Thanks again for all the info
Thanks again for all the info
I spent the better part of a day taking the intake manifold off cleaning it and then replacing TB coolant feed line and TB to ISC line. The leak is back <insert minimum 3 dirty words>.
(http://www.cygnusx1.net/supra/library/EPC/MKIII_NATO/291420/1603_2.html) shows the Tb feed line #16267 and on the same hard pipe there is what looks to be a cap off #90339-16001. I did not see the cap off, I thought that was the heater core line.
little backround on my car. When I purchased the car the coolant gauge was stuck on high, the mechanic that sold it to me (old co worker) told me it was just the sensor so I replaced it. Now it starts cold then skylines. I've done a coolant flush, new Thermostat, few new hoses and the gauge will start low then rise somewhat normally until about mid point where it sits then skyrockets again. I have heat and the odd time I can hear a coolant rush but it's cause I cannot get the air out of the system. It drives fine, no idea on what do if the leak dos'nt fix the problem. The head gaskets recent aswell. There is a large crack in the turbo housing, starts at the waste gate and reaches towards the turbine. Thought I saw somewhere that this can let coolant escape and make it over heat
Any advice would be helpful, I'm tired of cleaning the driveway.
(http://www.cygnusx1.net/supra/library/EPC/MKIII_NATO/291420/1603_2.html) shows the Tb feed line #16267 and on the same hard pipe there is what looks to be a cap off #90339-16001. I did not see the cap off, I thought that was the heater core line.
little backround on my car. When I purchased the car the coolant gauge was stuck on high, the mechanic that sold it to me (old co worker) told me it was just the sensor so I replaced it. Now it starts cold then skylines. I've done a coolant flush, new Thermostat, few new hoses and the gauge will start low then rise somewhat normally until about mid point where it sits then skyrockets again. I have heat and the odd time I can hear a coolant rush but it's cause I cannot get the air out of the system. It drives fine, no idea on what do if the leak dos'nt fix the problem. The head gaskets recent aswell. There is a large crack in the turbo housing, starts at the waste gate and reaches towards the turbine. Thought I saw somewhere that this can let coolant escape and make it over heat
Any advice would be helpful, I'm tired of cleaning the driveway.