oshi16
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- Jun 25, 2011
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- Gosnells, W.A.
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- 85' VK 202 Carby
Hey Guys,
I'm calling in some help on this one. This question will not be for the feint hearted I don't think.
I have an 85' VK Commo with the black 202 carby motor. I've done an electronic dizzy conversion; and a Weber 34ADM Conversion (all running sweet). I've replaced the entire cooling system and various other bits and pieces. Also did a gasket replacement job from the head gasket and above. (push rod, exhaust...etc....)
The problem I have is this: My Vk is overheating in warmer conditions and increases more under load over 80KM/h. The engine runs sweet, the cooling system is doing its job and the timing/tuning is good. I've wrestled with this problem for over a month trying various different things and I think I may know what the answer is, but I need your opinions.
(this info is only my opinion, please correct me if I'm wrong =D ) The connection between the Intake and Exhaust manifold on the standard stock EST VK connects with two open ports (this is where the intake sits on the exhaust). One of the ports (left one/closer to the front of the car) has a heat valve/butterfly valve that opens and closes depending on engine conditions, and is controlled by the EGR; and/or the other emission crap. And I'm under the impression that this is a normal setup. The smaller (right) port stays open to allow an opening between the intake and exhaust (due to blockage possibilities or something...this actually confuses the hell out of me...why the hell is it there!?); and the bigger right one opens when the engine is cold and shuts when the engine is hot...I think.
My Point is this; I have removed the butterfly valve (melted it out with a welder, leaving a bodge open hole spacer so it can sit evenly) in conjunction with the EGR equipment (that all seized up). I had no idea what the ports were at the time (this was a few months back when I did the gasket replacement job) and this may be causing my problem. My thoughts are that the open ports are supplying Exhaust Gas Recirculation (EGR) Constantly. Which in turn increases the Engine Temp and causes an odd rough idle after it has warmed up.
Ok so if this is the problem...which I hope it is...so I've finally nailed it this time! But if it is, how would I get around it? I have a brand new set of Pacemaker Extractors which I'm going to chuck on soon; which leads me to another question...how the hell do I fit the extractors with a stock intake? or do I need to get an after market type?
Sorry I know I've bombarded you all with many questions; I really don't want to, but I'm at my wits end! As much as I know about cars (vk's especially) there is still so many basic things I don't know.
Basically my questions are:
1. What are the lower intake ports that connect to the Exhaust Manifold...and will they cause a problem being constantly open?
2. How do I go about fitting extractors with a stock Intake?
Thanks to you all! Any reply will be greatly appreciated!!!!!!!!!!!! =D
Have a great weekend!
I'm calling in some help on this one. This question will not be for the feint hearted I don't think.
I have an 85' VK Commo with the black 202 carby motor. I've done an electronic dizzy conversion; and a Weber 34ADM Conversion (all running sweet). I've replaced the entire cooling system and various other bits and pieces. Also did a gasket replacement job from the head gasket and above. (push rod, exhaust...etc....)
The problem I have is this: My Vk is overheating in warmer conditions and increases more under load over 80KM/h. The engine runs sweet, the cooling system is doing its job and the timing/tuning is good. I've wrestled with this problem for over a month trying various different things and I think I may know what the answer is, but I need your opinions.
(this info is only my opinion, please correct me if I'm wrong =D ) The connection between the Intake and Exhaust manifold on the standard stock EST VK connects with two open ports (this is where the intake sits on the exhaust). One of the ports (left one/closer to the front of the car) has a heat valve/butterfly valve that opens and closes depending on engine conditions, and is controlled by the EGR; and/or the other emission crap. And I'm under the impression that this is a normal setup. The smaller (right) port stays open to allow an opening between the intake and exhaust (due to blockage possibilities or something...this actually confuses the hell out of me...why the hell is it there!?); and the bigger right one opens when the engine is cold and shuts when the engine is hot...I think.
My Point is this; I have removed the butterfly valve (melted it out with a welder, leaving a bodge open hole spacer so it can sit evenly) in conjunction with the EGR equipment (that all seized up). I had no idea what the ports were at the time (this was a few months back when I did the gasket replacement job) and this may be causing my problem. My thoughts are that the open ports are supplying Exhaust Gas Recirculation (EGR) Constantly. Which in turn increases the Engine Temp and causes an odd rough idle after it has warmed up.
Ok so if this is the problem...which I hope it is...so I've finally nailed it this time! But if it is, how would I get around it? I have a brand new set of Pacemaker Extractors which I'm going to chuck on soon; which leads me to another question...how the hell do I fit the extractors with a stock intake? or do I need to get an after market type?
Sorry I know I've bombarded you all with many questions; I really don't want to, but I'm at my wits end! As much as I know about cars (vk's especially) there is still so many basic things I don't know.
Basically my questions are:
1. What are the lower intake ports that connect to the Exhaust Manifold...and will they cause a problem being constantly open?
2. How do I go about fitting extractors with a stock Intake?
Thanks to you all! Any reply will be greatly appreciated!!!!!!!!!!!! =D
Have a great weekend!