GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: 6foot6 on 08 February 2010, 22:01
-
Looking at removing the bypass connector as detailed here
http://www.golfgtiforum.co.uk/index.php?topic=31666.0
my question for now is.
I take it the Bypass is the small pipe that connects the two together. Could I not just cut that in two and block both ends of that and that would remove the bypass the same as removing both parts and replacing with copper tubes?
(http://img.photobucket.com/albums/v23/andythegreek/mk2bypass2.jpg)
-
I believe they're "one use only" valves inside. So once the matrix bursts once then you have to replace them.
I know that on my mk2 jetta I bought new hoses to/from the matrix from GSF which meant you didn't need to use bits of copper pipe..
But don't buy it from GSF. It perished verrrry quickly!
-
my matrix has not burst its just that I get feck all heat in the cabin. The fix seems to be remove these componants and use copper pipe. the bypass seems to be the small hose that links the two pipes together - so cut that and block it surley that will force all coolant into the matrix ?
-
If your matrix is not bust... I would check these valves by ruuning the engine til it's up to temp and feel the pipes after the valves too see if they are as warm as the ones befor the valves....
If they are all cool then it maybe your water pump, or the thermostat sticking closed... I Guess...
As for not using the GSF ones I don't see what other options you have as VAG Only have one of the two pipes the other is NLA... and the one they do have is £30.00 plus vat....
The GSF ones and a 1.5 litre bottle of G12 coolant cost less than that!!!
-
In answer to your actual question, no you can't simply cut and block the smaller bypass pipe. If the valve is buggered you wont be able to force the flow through it, you will simply stop all flow from the flange on the engine.
-
As said, cutting or blocking the small pipe will have no effect, the problem with these is that there is a small thermostat in the metal bit that gets tired and shuts off the flow to the matrix at too low a temp, the black plastic bit just has a one way valve in it. If you look down the end of the metal bit (the end with the flange) you will see a flat metal 'sort of ' plug, just put the unit in a vice and drill an 8mm hole through the centre of that, its very soft metal so very easy (careful though, its a bit wobbly). Flush all the swarf out of it then put the whole lot back (make sure the thin bypass pipe is not full of smeg first and make sure the black plastic valve is clear). It will no longer operate as intended but it fits and saves messing with copper pipe, also you still get some bypass flow which does not go through the matrix so the matrix might just run a little cooler. Make sure you get the black bit back in as it came out, if you get it wrong the one way valve will be against the flow and you'll get no heat. :smiley:
-
Copper pipe option is a quick and easy fix. Throw away everything in your pic (both valves and the small bore pipe) and stick in two lengths of copper pipe. Marvelous.
-
cheers, guys going to tackle this tomorrow, should take about 20 mins and I can have some heat in the car!
-
I have been saying I'm gonna do the copper fix for aaaaages lol
Luckily I bumped into a couple of mates who happen to be plumbers :grin:
Two small lengths of 22mm copper for nothing so will do it tomorrow now, its gonna be like christmas day when my heaters work again
-
This is one of the best quick fixes ever, takes about 10 minutes to do (anyone can do it) and the car gets that warm you need to turn the heater down within 10 minutes of it being on hot, like a sauna,but without the chicks :grin:
Enjoy the heat on these cold winter mornings :wink:
-
You just have to remind yourself WHY the valve was there in the first place..
A couple of people have had their legs scalded in the last few years. I heard one guy was giving someone a passenger lap on a track day when his went!
-
I get worried bout this aswell, but I only ever do small journeys and I think my thermostat is stuck open so I hope mine doesnt go when I finally get orund to doing it lol.
For the sake of 20 quid I will end up buying a mk3 matrix and spend hours shouting and screaming like an angry homer simpson trying to fit it
-
You just have to remind yourself WHY the valve was there in the first place..
A couple of people have had their legs scalded in the last few years. I heard one guy was giving someone a passenger lap on a track day when his went!
Thats true... But you can't get then anymore they are NLA...
So if there bust you have no choice but to change them!!!
-
You just have to remind yourself WHY the valve was there in the first place..
A couple of people have had their legs scalded in the last few years. I heard one guy was giving someone a passenger lap on a track day when his went!
Thats true... But you can't get then anymore they are NLA...
So if there bust you have no choice but to change them!!!
the Heat would not be a cause of the blow.
The Matrix End tanks would blow , no doubt through age of matrix and or increase pressure on the track day when it happend inthe story.
Nearly every car I have owned either has a flap or leaver type matrix, flap type , coolant is flowed through the matrix at all times and the air flap direct the heat over the core when you want heat.
leaver type will only flow coolant through the matrix when you set it to hot, not one of them have ever had a bypass like the golf very strange.
-
the Heat would not be a cause of the blow.
The Matrix End tanks would blow , no doubt through age of matrix and or increase pressure on the track day when it happend inthe story.
Nearly every car I have owned either has a flap or leaver type matrix, flap type , coolant is flowed through the matrix at all times and the air flap direct the heat over the core when you want heat.
leaver type will only flow coolant through the matrix when you set it to hot, not one of them have ever had a bypass like the golf very strange.
From what I was told by a Dub Mechanic they put the valve in after a number of LHD cars had problems spraying hot coolant all over the drivers legs.
They put them in most MK2 when they were serviced at some point... At a VW Garage.. As An Upgrade..
Hence how you know the matrix has blown when the passenger footwell is soaking wet and stinks of coolant!!!
-
Yep it was a re-call, think it was a wiki article that said it was because a guy in America got burns from a matrix popping in a jetta years ago. Might not be why they issued a re-call but never the less, kinda puts me off bodging it with copper.
You can still get the bypass valves from scrappies but they could well be shagged and some people do sell them on the internet but a couple I saw on ebay bagged as new were fetching at least double what VW used to sell them for.
The guy I speak to at GSF in leicester (who happens to have a MK2 GTI :smiley:) advised I fit a MK3 matrix cus they only cost like 20/25 quid
-
Yep it was a re-call, think it was a wiki article that said it was because a guy in America got burns from a matrix popping in a jetta years ago. Might not be why they issued a re-call but never the less, kinda puts me off bodging it with copper.
You can still get the bypass valves from scrappies but they could well be shagged and some people do sell them on the internet but a couple I saw on ebay bagged as new were fetching at least double what VW used to sell them for.
The guy I speak to at GSF in leicester (who happens to have a MK2 GTI :smiley:) advised I fit a MK3 matrix cus they only cost like 20/25 quid
GSF do 2 types of Mk2 Matrix's... I Think.. a good one and a crap one... I bought the good one for £30.00 from GSF with discount...
I also got their hoses... Bottle of G12 for £30.00, have kept the old VW ones just in case and will get some copper pipe just in case, as a back up!!
-
I now have a toasty Heater! Whoop!
popped to B&Q and got a 22mm copper connector , took out the bypass, put the copper pipe in, blocked the little bypass pipe with a bolt and a hose clamp and fired up , let it warm up and its lurrrvly and warm - Result!