93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
#1
93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
Not sure whether to put in integra forum or not, but i have a 93 civic hatch. b20 block, b16 lsd tranny, gsr head. Titanium rods, titanium valve springs and retainers, bored to 1.9, larger valves, port and polished, you know... lots of good stuff to go vrroom vroooomm. But i just finished dropping this motor in this car and it ran ok before i started to do all this work. Now if im driving along on the highway, then go into neutral it overheats. Also, if i am cruising along at lets say 80 mph in 5th gear, then floor it for 20 seconds, it'll instantly overheat. Fan is on, fluids are topped off. It has a new water pump. Thermostat is opening. Im stumped. any ideas?
#3
Re: Overheating in nuetral
It doesn't leak whatsoever until it starts boiling. When i say overheat, i mean my gauge crawls all the way to its max. I pull over and my overflow is boiling and starts to drip out the top. I took it for a steady 70 mph trip for 40 miles and when i parked it wasn't hot or leaking. But it doesn't like neutral.
#4
Honda-Tech Member
Re: Overheating in nuetral
i'm guessing it overheats and you keep on driving it as it goes away when moving ? you may have warped the head if done enough, when the car is parked and cold check the coolant lvl. did you bleed the coolant sys properly after changing the t-stat ?
#5
Re: Overheating in nuetral
Yes cooling system was bleed, head is NOT warped. It was 100% stripped down, resurfaced, machined out a bit for larger valves, and new EVERYTHING inside. Took it to a machine shop and paid big bucks to get it built right. Fluids when cold is topped off. thermostat is new and there is no air in system. And if it hits the H when im on it or in neutral, i can put it in 5th and don't touch the gas pedal and just coast and it starts to go down slowly, but id rather just pull over. I'm stumped... i really am...
#6
Re: Overheating in nuetral
overheating usually means it's not bled completely. are you doing the procedure correctly? like running it with the heat on on an incline with the cap off? could also be your rad cap is broke. hopefully you haven't done any damage to your engine letting it overheat to H multiple times
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#8
Re: Overheating in nuetral
Fan is not in reverse. Its the same fan i've been running for my past few motors. Also, it is bleed correctly, i have done it many times, this is like my 12th motor i've put in this car. I don't have a heater, its an autocross car so it's stripped to it's bones, 16 point cage, no blower / heater, etc. But im sure no air is in the system. It's bugging the hell outta me
#10
Re: Overheating in nuetral
I actually got my waterpump from the local Honda dealership parts department. Everything else has been purchased from online stores, password jdm, summit racing, etc.. and from companies directly. Pump is NEW. not reman
#11
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Re: Overheating in nuetral
are you sure its overheating? not a faulty ECT sensor?
*edit*
derp. just read u say its coming out the overflow.
do a compression test and leakdown. there are many reasons why your overflow is overflowing. blown piston rings is one of em
*edit*
derp. just read u say its coming out the overflow.
do a compression test and leakdown. there are many reasons why your overflow is overflowing. blown piston rings is one of em
#15
Re: Overheating in nuetral
Who did the p&p?? IF they hogged out your ports too big they made the cooling jackets too thin, causing the heat issue. Go ahead and ask how I know. It IS WARPED from overheating multiple times now. Service limit on the head is only .002 (cliffs: two thousandths of an inch)How do you think they get warped in the first place? How do you "bore out" a 2.0 to a 1.9 LOL. The only way to downsize displacement without re-sleeving is to de-stroke it with a 1.8 crank...EDIT- your motor is already toast, it'll grenade soon. Epic fail...
#16
Re: Overheating in nuetral
Most likely.
The public message here is that the temp gauge in the cluster is not just a dash decoration. Monitor the temp gauge regularly and never let the needle rise past the halfway mark before you pull over, turn the engine off, and let it cool.
The public message here is that the temp gauge in the cluster is not just a dash decoration. Monitor the temp gauge regularly and never let the needle rise past the halfway mark before you pull over, turn the engine off, and let it cool.
#17
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
LOL head is NOT warped. So to the 2 people agreeing it is now warped, i just had it torn off and sent back to machine shop. It is FINE. Jackets aren't too thin, fan IS COMING ON, if you read above i mentioned the fan was working. And to S2BumpsticksGSR, you think it's toast? Just got back from drag strip, did 7 pulls on the 1/4 mile and it was fine. Even with a 150 shot....
Compression is good, so not internal issue. And it is sleeved and stuff, titanium rods, ARP rod bolts, ARP studs, titanium valve springs, titanium retainers, cartel cams stage 2 cams, port n polished, larger valves, refinished crank, new oil pump, all new everything.. so if you'd like to continue calling me an "epic fail" enjoy yourself. Meanwhile, i will be on the laguna seca as usual!
went ahead and got a new pressure cap yesterday, it isn't overheating like it was before, but in stop and go traffic it still likes to get a little warm. Please, if you're just gonna say im an idiot or something don't bother. ASE certified in 5 categories, graduated from Automotive School and have a degree in automotive technology. I know how to build motors, just not familiar with Honda.. i'm actually a ford kinda guy, got my 625hp 1988 mustang that's my baby. This is just an auto cross car to race with my buddy.
Compression is good, so not internal issue. And it is sleeved and stuff, titanium rods, ARP rod bolts, ARP studs, titanium valve springs, titanium retainers, cartel cams stage 2 cams, port n polished, larger valves, refinished crank, new oil pump, all new everything.. so if you'd like to continue calling me an "epic fail" enjoy yourself. Meanwhile, i will be on the laguna seca as usual!
went ahead and got a new pressure cap yesterday, it isn't overheating like it was before, but in stop and go traffic it still likes to get a little warm. Please, if you're just gonna say im an idiot or something don't bother. ASE certified in 5 categories, graduated from Automotive School and have a degree in automotive technology. I know how to build motors, just not familiar with Honda.. i'm actually a ford kinda guy, got my 625hp 1988 mustang that's my baby. This is just an auto cross car to race with my buddy.
#18
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
I'm starting to think it's an issue of not having enough fluids. I have a half sized radiator and i daily drive this car so it revs really high. I think i'm going to purchase a full size aluminum racing radiator tonight. This is the same radiator, fan, etc i ran with my last motor and it was fine, and i know my water pump and t-stat is good, so im pondering the idea of lack of fluids. sounds stupid.. but who knows!?
#19
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
Given your expertise, you've got to admit that allowing the temp gauge to reach the HOT red zone is extremely unwise and risky for these Honda engines. But glad to hear your engine did not sustain damage.
#20
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
I understand that letting any engine overheat that isn't an old muscle car is terrible and risky (ive seen some cars have the heads turn red from heat and then cool off and run fine) ... but my gauge is hitting the H, then i put it in 5th and within 20 seconds it's back to normal. I will admit i don't know sh*t about Honda's like I do a ford small block, but im learning as I go. Never believed a 4 banger was fun or fast because everyone out here is a 15 year old kid with a rice burner...but my buddy has a gsr swapped hatch with a jackson blower running 10 psi and it blew my mind away.. so i bought one with him! i'm learning, but thank you all for your input, ordered radiator, should be in tomorrow, will let you all know. Then.. time to save up for injectors, fuel pump, and jackson racing supercharger! Goal is show car, 1/4 mile in the 10's / 11's i'm at sea level), mainly autocross, but still daily drive her. We'll see how it goes, lol. I normally focus on 1320, but my 16 point cage is already inspected and stamped by NHRA and SCCA.. so why not have a muscle car for drag and 4 banger for auto-x? Also, on an unrelated note, does anyone know what distributor i should run? Finding lots of mixed reviews.
#21
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
Could have a faulty thermostat. Just cause its not bad dont mean its not opening at the wrong temp. Try a new one or try running without one an see how it runs. I had the same problem with my car awhile back.. Would only overheat at idle or in stand still traffic. Went through everything an after 2 or 3 different brands of thermostat it stopped. Could be the simple things that make bigger problems. Lmk how it goes..
#22
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
I understand that letting any engine overheat that isn't an old muscle car is terrible and risky (ive seen some cars have the heads turn red from heat and then cool off and run fine) ... but my gauge is hitting the H, then i put it in 5th and within 20 seconds it's back to normal. I will admit i don't know sh*t about Honda's like I do a ford small block, but im learning as I go. Never believed a 4 banger was fun or fast because everyone out here is a 15 year old kid with a rice burner...but my buddy has a gsr swapped hatch with a jackson blower running 10 psi and it blew my mind away.. so i bought one with him! i'm learning, but thank you all for your input, ordered radiator, should be in tomorrow, will let you all know. Then.. time to save up for injectors, fuel pump, and jackson racing supercharger! Goal is show car, 1/4 mile in the 10's / 11's i'm at sea level), mainly autocross, but still daily drive her. We'll see how it goes, lol. I normally focus on 1320, but my 16 point cage is already inspected and stamped by NHRA and SCCA.. so why not have a muscle car for drag and 4 banger for auto-x? Also, on an unrelated note, does anyone know what distributor i should run? Finding lots of mixed reviews.
Have you perused the FAQs sticky at the top of this forum, as well as Hybrid forum and the Forced Induction forum? Lots of good stuff there for a guy with your interests, expertise, and enthusiasm.
#23
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
Still cofused how you bore out a 2.0 to a 1.9- expertise my ***. That doesn't work in any engine format. Just because you have expensive parts and deep pockets doesn't even come close to expertise. I'm not claiming to be an expert, but that engines bearings are screwed from being cooked. It won't last long after repeated climbs to the H on the temp gauge. I might not have as much $, but at least I have sense not to jeopardize my engine. EDIT; I'd venture to say you probably have titanium retainers, not springs
Last edited by S2BumpsticksGSR; 05-08-2013 at 11:19 AM.
#24
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
Still cofused how you bore out a 2.0 to a 1.9- expertise my ***. That doesn't work in any engine format. Just because you have expensive parts and deep pockets doesn't even come close to expertise. I'm not claiming to be an expert, but that engines bearings are screwed from being cooked. It won't last long after repeated climbs to the H on the temp gauge. I might not have as much $, but at least I have sense not to jeopardize my engine.
#25
Re: 93 civic hatch/b20 block with gsr head - Overheating in neutral and while driving
Please, let's keep this discussion entirely focused on tech rather than making personal remarks.