engine temp

[driveshaft22]

Hi. Ive just put a turbo on my buick v6 and done a couple of test drives.

2 questions

1 Engine temp is going up really fast and staying there even with a 16" thermo fan on. Whats the best way to keep a good engine water temp? Do the GN's have a different radiator to the Non turbo models?

2. Do you need to run a oil catch can to vent the block or does the PCV valve in the inlet manifold do it for you?

Any help would be great thanks.

 

[novaderrik]

how hot is the engiine running? with an accurate gauge, i wouldn't be worried until it starts getting much above 200 degrees, but a lot of guys like to keep the temps down below 180 for some reason.

the whole purpose of the PCV valve is to pull combustion gasses that blow past the rings out of the crankcase. there is an air inlet on the valve cover to let fresh air in.

 

[driveshaft22]

Hi, I dont know what temp its at but it gets over 3/4 on the gauge. Can I modify the thermostat or remove it?
There's no air inlet on the valve cover on this motor.

 

[novaderrik]

what kind of a car is that? looks like a fwd engine turned rightways..
there is an air inlet in there somewhere for the crankcase vent- ya just gotta find it.

 

[driveshaft22]

what kind of a car is that? looks like a fwd engine turned rightways..
there is an air inlet in there somewhere for the crankcase vent- ya just gotta find it.

Its a Toyota Landcruiser pickup. 4x4.

Ive been working on this for months and Im totally sick of it. I just wanna jump in a drive and not overheat, blow up, catch fire or leak fluids.

As you can see theres not much room in front of the motor so I had to scrap the fan shroud. Do you think that'd cause the over heating.

 

[driveshaft22]

Heres a more up to date pic. You can see how close everything is to the radiator. Mainly cause the adaptor kit for the transfer case brought the whole lot 10" forward from where it was meant to go.

 

[charlief1]

I LIKE IT!!!! Here's a welcome from over the pond dude. The Buick needs as much radiator and air flow as you can get in it. As far as the design of the 3800 your PCV should be at the rear of the engine and you will need a catch can with a hose going to the air box. There's another guy with a 3800 FWD project in the hybred section and he should be able to help you as far as cooling issues and PCV.

 

[TurboV]

WTF! First time i looked at the engine, it freaked me out. Pretty cool, stick it out, something unique.

 

[Junior Samples]

Ditto...pretty slick mate

maybe try and custom fab an extension on your core support to move the rad out a bit.

what degree stat are you running? i didnt catch it. perhaps drill a few holes on the base of the T-stat
Do you have the hood vented?.. maybe add a louver right in front to help the heat from the turbo vent out?

Keep us posted

Mike

 

[TURBOELKY]

DO you have an aftermarket gauge? maybe the gauge is just faulty/inaccurate? You can drill a hole in the thermostat to vent out the air that may be trapped in there. Dont completely remove it though.

 

[driveshaft22]

DO you have an aftermarket gauge? maybe the gauge is just faulty/inaccurate? You can drill a hole in the thermostat to vent out the air that may be trapped in there. Dont completely remove it though.

I took the whole stat out and went for a short drive. No change, very high temp and I dont think its the gauge cause its really hot and the over flow is getting pounded.

If you see the top pic there are 2 big vents in the hood. But they're closer to the back.

I think Im just gonna have to rip out the radiator and mount the shroud somehow, Maybe get a couple of heater cores and run the heater hoses thru them with small thermo fans.

Thanks

 

[driveshaft22]

I LIKE IT!!!! Here's a welcome from over the pond dude. The Buick needs as much radiator and air flow as you can get in it. As far as the design of the 3800 your PCV should be at the rear of the engine and you will need a catch can with a hose going to the air box. There's another guy with a 3800 FWD project in the hybred section and he should be able to help you as far as cooling issues and PCV.

So on the Inlet man, under the TB is a hose from the inlet man to the TB which is the PCV hose so ive been told. I need to block off that hose on the TB side and run it to a catch can from the inlet man side? Is the PCV a one way system or am I presurising the crank case. I was gonna add a breather from the rocker cover to the catchcan anyway.

see pic for hose in question.
Thanks

 

[TURBOELKY]

did you have the overheating problem when the shroud was on? or is this just something "new" to the cruiser? definitely get an aftermarket gauge so you know the EXACT temperature! post up some more info on the engine, like mileage, engine mods, etc. Have you ran this engine before without the overheating problem?

 

[driveshaft22]

did you have the overheating problem when the shroud was on? or is this just something "new" to the cruiser? definitely get an aftermarket gauge so you know the EXACT temperature! post up some more info on the engine, like mileage, engine mods, etc. Have you ran this engine before without the overheating problem?

I just rebuilt this motor. Its only done about 30miles. I basically left it as a stock NA motor with stronger pistons and rings. There are guys over here in australia running 25 psi into the same motors that have done 200,000.

rebiult v6
shift kitted th700
KKR480 turbo
LP fuel pump and 1.5 Litre surge tank
bosch 044 fuel pump
333cc inj
custom turbo pipes and extractors
modified comp, with turbo chip
2 bar map sensor
FMIC
BOV
Custom sump
Custom cross member
adaptor kit from marks 4x4
boost gauge
oil presure gauge
thermo fan
commy seats, carpet, shifter, instruments, fuse boxes, computer, harness, airbox and even the windscreen washer bottle.

Theres so much more done but you get the idea.

Ive got the original Toyota radiator which is massive, but to re install it Id have to cut the whole front to bits and relocate the FMIC and make new IC pipes.

I hope that helps.

 

[TURBOELKY]

do you have the fan wired backwards? pushing instead of pulling? is the fan coming on? i'm just throwing some idea's out there, overheating can be frustrating!

 

[driveshaft22]

do you have the fan wired backwards? pushing instead of pulling? is the fan coming on? i'm just throwing some idea's out there, overheating can be frustrating!

Yeah its all working properly. If I cut up the stock shroud and mount the new fan inside it, I might be able to make it fit. Someone told me that a shroud makes the fan 20% more efficient. I dont know if thats accurate but 20% is a lot!

 

[TURBOELKY]

Yeah its all working properly. If I cut up the stock shroud and mount the new fan inside it, I might be able to make it fit. Someone told me that a shroud makes the fan 20% more efficient. I dont know if thats accurate but 20% is a lot!

yeah, a shroud is a good ideal. You may just have air in your coolant system, thats what it really sounds like. Especially being its a new engine. You need to try and purge it out if thats the case. I'm not sure on that engine, but the gn's dont have an air purge in the cooling system.(that i'm aware of) but you can try parking your truck, where the radiator is slightly higher than the engine. Start it up with the radiator cap off, and let it get up to temp. When the thermostat opens up, some water may pour out of the radiator, but no more than 1/2 a gal. If there is air, you'll notice the radiator level go WAY down when the thermostat opens. Leave your heater ON so that purges too. fill it all the way up and put the cap on. See if that works for you! I do that EVERY time I drain the water from an engine. HTH.

yeah, you need a shroud!

 

[charlief1]

So on the Inlet man, under the TB is a hose from the inlet man to the TB which is the PCV hose so ive been told. I need to block off that hose on the TB side and run it to a catch can from the inlet man side? Is the PCV a one way system or am I presurising the crank case. I was gonna add a breather from the rocker cover to the catchcan anyway.

see pic for hose in question.
Thanks

We have a winner. Block the TB off and reroute the hose to a can and from the can to the air box or just in front of the turbo. With presure being built in the system before the TB it's feeding back into the engine building internal presure. You might end up blowing the pan or valve cover gaskets.

 

[driveshaft22]

We have a winner. Block the TB off and reroute the hose to a can and from the can to the air box or just in front of the turbo. With presure being built in the system before the TB it's feeding back into the engine building internal presure. You might end up blowing the pan or valve cover gaskets.

Right, I did that. Catchcan is working great, no more smoke under boost. and i put in a thermo fan overide switch so I can turn it on before it gets to halfway.

Just went for a ten minute drive boosting pretty hard, and the temp didnt get above halfway, and no oil leeks or smoke.

I feel much better now. Im doin a big test drive in a few days so Ill let you know how it goes.

Thanks everyone.

 

[novaderrik]

did you have the computer controlling the electric fan? if so, that might explain why you were having problems. it probably never turned the fan on until 230 degrees.
you could wire it so the fan is always on, or you could get a 180 degree temp switch that does nothing but turn on the fan relay at 180 degrees.