1.7 Diesel LHD Overheating in hot weather.........WHY?

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welshbird
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1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

Afternoon all, am hoping for a lil help if possible, am a VW virgin and having some summer problems.......Took Helga down to Exeter last weekend, she was fine all the way down to Bristol where we sat in traffic on M5 for nearly an hour, then flashing red light came on and temp gauge started to rise. I stopped at services to check water level and it was still between min and max so had a cuppa, let her cool down a bit and carried on with journey. Got to Exeter ok temp gauge stayed just to the right of red light, which continued to flash. Saturday morning checked water level in engine bay and expansion tank (topped up expansion tank as it had dropped just below minimum line) went on a little jaunt, about 20miles, down those hairy single lanes with 10foot hedges either side and the red light came on again and temp gauge rose until it couldn't get any further to the right. We pulled over immediately to find the water in expansion tank literally boiling and steam being released via screw lid - aaaggghhhhh :? So made another cuppa, waited an hour for everything to cool down and checked levels again - this time expansion tank was empty (no surprise with the amount of steam released) but tank in engine bay was still half full. Topped up expansion tank again and carried on our way - gauge remained mid way between red light (still flashing) and top so kept to 40mph all the way back to campsite. Spoke to helpful? campsite owner who suggested that my head gasket might be on way out as we couldn't see any leaking hoses, and to take it really slowly on way home. Set off Sunday evening with water tanks checked, doing 40mph, got 20 miles down the road when flshing red light was back and temp gauge off the scale again :x Stopped at nearest services and called out breakdown service, who arrived and chuckled saying that us VW owners litter the roads in summer with overheating vans, he listened to Helga's engine and said she sounded fine, not like cylinder head was knackered - but he claims that because engines are in the back in hot wather the air doesn't flow into engine bay so it overheats........surely this can't be right? What's the point of owning a camper that you can't use in the summer? Does anyone know what's wrong with my Helga? I don't know any VW specialist mechanics so don't want to risk taking her to anyone until I have a rough idea of what's wrong and what it'll cost........ Thank you Thank you any help gratefully received!
Helga, 1988 ex German Army radio van

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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by jamesc76 »

First thing first have you bled the system properly????? I have a 2.2 subaru lump in the back of mine and they do get hot I fitted an overide switch to put the fan on the radiator to help cool things down you have to rememeber these vans have the engine in a box at the back with nearly 5 meters each way to and from the radiator in the front! When sat in traffic for that long switch the engine off if you can, saves fuel and heating up! How many modern cars do you hear in traffic with the fans running full tilt every 5 mins to cool the engine!
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welshbird
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

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jamesc76 wrote:First thing first have you bled the system properly????? I have a 2.2 subaru lump in the back of mine and they do get hot I fitted an overide switch to put the fan on the radiator to help cool things down you have to rememeber these vans have the engine in a box at the back with nearly 5 meters each way to and from the radiator in the front! When sat in traffic for that long switch the engine off if you can, saves fuel and heating up! How many modern cars do you hear in traffic with the fans running full tilt every 5 mins to cool the engine!

Hi James thanks for trying to come to my aid, but I really am a VW 'virgin' .........obviously to you 'have you bled the system properly?' is a reasonable question........I am the least mechanically minded female I know, so no I have never bled the system! I guess I should find myself a trustworthy mechanic (if that's not a contradiction in terms) and get the system thoroughly bled and refilled........can anyone recommend anyone in the north oxfordshire/south warwickshire area?
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by camper »

steam being released via screw lid - aaaggghhhhh .Replace the screw lid on the expansion tank it could be faulty or the expansion tank where it screws .The engine coolent system needs to be under pressure once its lost it will start boiling.

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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

Thanks Camper, I shall concentrate on replacing that screw lid (I can see that the rubber seal/washer is knack'd) seal and getting system bled & refilled and take it from there.
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by camper »

welshbird wrote:Thanks Camper, I shall concentrate on replacing that screw lid (I can see that the rubber seal/washer is knack'd) seal and getting system bled & refilled and take it from there.
Dont replace the cap from GSF carparts use VW main dealer or JKampers .

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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

Will do!
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by ermie571 »

Welshbird,
this chap may help

https://club8090.co.uk/forum/viewtopic.php?f=17&t=52411

sounds like you are a contender for a gt to now your van session - see chat!

Em
x
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welshbird
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

ermie571 wrote:Welshbird,

sounds like you are a contender for a gt to now your van session - see chat!

Em
x

lol, I certainly am Em, I think I may need 1-1, I could possibly be the least knowledgable T25 owner on the planet! I will PM toomanytoys asap

x
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by R0B »

or http://www.brickwerks.co.uk/index.php?p ... t&Itemid=6

Dont replace the cap from GSF carparts use VW main dealer or JKampers .
2.1 LPG/Petrol Auto Caravelle

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welshbird
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

R0B wrote:or http://www.brickwerks.co.uk/index.php?p ... t&Itemid=6

Dont replace the cap from GSF carparts use VW main dealer or JKampers .

Thanks Rob, but it's the cap on the expansion tank that's got the dodgy seal, not the main tank in engine compartment.........
Helga, 1988 ex German Army radio van

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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by jamesc76 »

welshbird wrote:Thanks Rob, but it's the cap on the expansion tank that's got the dodgy seal, not the main tank in engine compartment.........


Thats dont have a good seal on it as its not ment to hold pressure etc so thats done as it should! As you have put get someone who knows how to bleed these vans properly and that should sort it its probs got air in the system from whats happened!
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welshbird
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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

jamesc76 wrote:
welshbird wrote:Thanks Rob, but it's the cap on the expansion tank that's got the dodgy seal, not the main tank in engine compartment.........


Thats dont have a good seal on it as its not ment to hold pressure etc so thats done as it should! As you have put get someone who knows how to bleed these vans properly and that should sort it its probs got air in the system from whats happened!

Cheers James, I see you're realising just how little I know!

Many thanks to all who've offered suggestions, what a fab forum ;-)
Helga, 1988 ex German Army radio van

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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by toomanytoys »

Could be a couple of things other than head/head gasket... (although overheating it isnt going to help)

Thermostat could be stuck/damaged and not opening properly.. radiator not flowing as much as it should with debris blocking it..(internally, externally possible also)..

What concerns me is it was ok until it got hot and boiled over (fan not working?), then anything after that is causing grief.. there could be not a lot of water in the system now.. the cooling system holds approx 17L... 2-3 times your average car.. so sticking a couple of L in the top up tank isnt enough..

Needs to have fan checked, fit a new thermostat and pressure cap and refill and bleed the system... then its down to wether you have got away with not damaging head gasket or cracking head...

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Re: 1.7 Diesel LHD Overheating in hot weather.........WHY?

Post by welshbird »

Thanks Si, I was feeling ok about dear Helga, now I'm a bit worried again :? lol, you have pm!
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