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Author Topic: LOL just a question on over heating..  (Read 1288 times)

Offline bigBri

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LOL just a question on over heating..
« on: August 10, 2018, 02:07:28 PM »
Most of you will know the score on my bus, been here a few times ha ha. I did a bleed yesterday took her for spin released cap left her running heaters on full plus booster .. everything seemed great, had a trickle from return and more gas gave me more water, problem a few weeks ago was the return couldn't keep up with the flow from bottom of expansion tank (makes me think blockage) got everything stable took it out and overheat with massive dump in expansion tank.. got her home and bled as above, again everything stable, pop good today and the expansion tank empty.. WTF is it blockage, split pipe but no sign of water on floor.. ????

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Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #1 on: August 10, 2018, 05:50:05 PM »
I know you have issues with HG potentially but what you describe there is classic air lock symptoms. Air lock cleared as it has cooled causing level to drop.
They can be a right pain to bleed it all out especially as the PD has very little waste heat to get thermostat fully open most of the time.

Now itís corrected just monitor over the coming days see what happens.

Offline James Sharan TDI 4motion

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Re: LOL just a question on over heating..
« Reply #2 on: August 12, 2018, 10:59:30 AM »
I'm having overheating issues as well. Is there a technique to bleed the system properly, because I'm not having any luck with mine.
Cheers

Offline christiant

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Re: LOL just a question on over heating..
« Reply #3 on: August 12, 2018, 01:07:08 PM »
My galaxy seems to build some pressure in cooling system. No overheating and coolant loss. I will try to tighten head bolts but in the meantime had compression checked 21 bar on all 4... I have blanked off EGR with a plate between the flange coming from the cooler to the EGR. I am starting to suspect the cooler as I still have it on. It seems on only pressurise on very long joyrneys. I will bypass the cooler and see how it goes.

Offline James Sharan TDI 4motion

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Re: LOL just a question on over heating..
« Reply #4 on: August 12, 2018, 02:12:43 PM »
My galaxy seems to build some pressure in cooling system. No overheating and coolant loss. I will try to tighten head bolts but in the meantime had compression checked 21 bar on all 4... I have blanked off EGR with a plate between the flange coming from the cooler to the EGR. I am starting to suspect the cooler as I still have it on. It seems on only pressurise on very long joyrneys. I will bypass the cooler and see how it goes.
My EGR cooler is removed and bypassed and im having pressurising issues. Maybe the cooler isn't the reason behind your problem christiant

Offline bigBri

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Re: LOL just a question on over heating..
« Reply #5 on: August 15, 2018, 08:31:39 PM »
Dropped the car off with mate, passed on everything you've told me, interestingly not sure if related but the thermostat switch (on the right side front) seemed to have rust staining where it's bolted to engine, as I understand it the diesal works under great pressure, guess I'll know in a few days lol

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Offline bigBri

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Re: LOL just a question on over heating..
« Reply #6 on: August 16, 2018, 06:07:21 PM »
I know you have issues with HG potentially but what you describe there is classic air lock symptoms. Air lock cleared as it has cooled causing level to drop.
They can be a right pain to bleed it all out especially as the PD has very little waste heat to get thermostat fully open most of the time.

Now itís corrected just monitor over the coming days see what happens.
Alright Johnny, thanks for sticking with me on this one, picked her up today, I'll explain what he did..
He checked all pulleys and tensioner all good, left her running all day with cap off, got it level, came back next morning it had dropped, so he changed expansion tank and found the sensor damp as well changed that, (he think hairline crack opening up under heat) got everything stable..
Now picked her up and took her on valley road, a good up hill battering, she flew up there no problems, pulled up and pop bonnet to find expansion tank pretty rammed, left her cool a bit watched it lower slowly as it cooled, run her home (a good 30 mile run) heaters and booster on full, again leave her cool but then find tank low level, slowly release cap and as air comes out of expansion tank the level comes back up..
Mate it should be bled by now surely.. ha ha ha

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Offline graham

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Re: LOL just a question on over heating..
« Reply #7 on: August 16, 2018, 09:11:14 PM »
done a sniff test? eliminate head gasget befor you even bother

Offline christiant

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Re: LOL just a question on over heating..
« Reply #8 on: August 16, 2018, 09:38:11 PM »
A sniff or compression test most probably won't show anything.  The engine needs to be under load for any gasses to show up on the sniff test unless the leak is huge.. The only way is a leak down test.

Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #9 on: August 17, 2018, 12:35:02 AM »
Alright Johnny, thanks for sticking with me on this one, picked her up today, I'll explain what he did..
He checked all pulleys and tensioner all good, left her running all day with cap off, got it level, came back next morning it had dropped, so he changed expansion tank and found the sensor damp as well changed that, (he think hairline crack opening up under heat) got everything stable..
Now picked her up and took her on valley road, a good up hill battering, she flew up there no problems, pulled up and pop bonnet to find expansion tank pretty rammed, left her cool a bit watched it lower slowly as it cooled, run her home (a good 30 mile run) heaters and booster on full, again leave her cool but then find tank low level, slowly release cap and as air comes out of expansion tank the level comes back up..
Mate it should be bled by now surely.. ha ha ha

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Hate to say it but that is without doubt the head gasket blowing by from cylinder to coolant jacket.
As above sniff test and compression test will not prove anything on these as it needs to be hot and under heavy load. Got to do what I did and go with gut feeling and fetch the head off.

Offline James Sharan TDI 4motion

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Re: LOL just a question on over heating..
« Reply #10 on: August 19, 2018, 08:23:43 AM »
I carried out a compression test and sniff test yesterday. 400psi across all cylinders and no colour change on the sniff test. I flushed out the whole cooling system and removed the thermostat. I runs a bit cooler now (about 80 degrees) and the blowers are running hotter too. I'm not totally happy with it yet bit my wife needs to use I the car for a long trip so I'm happier at the temporary lower running temperature for now.

Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #11 on: August 19, 2018, 11:08:09 AM »
Should be ok for temp measure I would think.

When you did sniff test was engine at idle or did you give it some revs? The only way you will get a PD to fail is if head gasket totally shot or you get revs and temp right up

Offline James Sharan TDI 4motion

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Re: LOL just a question on over heating..
« Reply #12 on: August 19, 2018, 05:26:37 PM »
No it was just idling

Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #13 on: August 20, 2018, 09:23:02 AM »
If you do it on hot engine and get someone to keep revs up I suspect it will fail the sniff test then.

Offline bigBri

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Re: LOL just a question on over heating..
« Reply #14 on: August 21, 2018, 04:59:38 PM »
Alright Johnny, sorry to be a pain because I know you've explained this a million times but can you tell me which bolts I need for head and also I did the water pump and thermostat roughly 6 months ago, do they need to be changed, will get my mate to put new cam belt on but again that changed roughly 1 year ago, had my mate have a look last time he had car it's good, anything else I can pass on to my mate to make things easier would be help please mate, I've seen a few heads on eBay, worth it 2nd hand if worst comes to worst. Thanks again fella

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Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #15 on: August 21, 2018, 11:04:11 PM »
You want to get the head bolts for 150bhp engine,a recent post had the part number on but sure a quick fleabay search will bring up the ones you need.

I would leave the thermostat but personally I would change pump and timing belt kit again if it was me. I know it has been done in last 12 months but taking off to do head and re tensioning etc could stress something.

I know someone took head off with turbo connected buts itís a lump to get out and bit of a struggle,i unbolted and pushed back off head and secured in place away from head by cable tying to bulkhead. Other than that itís a fairly straightforward job.

Offline christiant

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Re: LOL just a question on over heating..
« Reply #16 on: August 22, 2018, 07:48:32 AM »
You just need to replace the belt itself and the tensioner, if you have the harmonic dampener thing you can reuse that too and the water pump will be fine.

Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #17 on: August 22, 2018, 11:31:46 AM »
While doing all that work for the sake of £30 itís not worth re using the water pump with a new belt in my opinion.
The cost to replace is mainly labour so with it stripped for sake of a few bolts and £30 I wouldnít take the risk.

Offline christiant

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Re: LOL just a question on over heating..
« Reply #18 on: August 22, 2018, 03:14:42 PM »
That is true but if it is recent with a metal impeller it can be done. However the oil seal on the camshaft and injector seals along with their bolts should definitely be replaced if stripping the head. It also is a good idea to do the valve stems and seals, but not so necessary. If you go by the manual the rocker bolts need renewing and the bearing caps in the head if taken off too, but I found they are fine being reused. 

Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #19 on: August 22, 2018, 03:34:31 PM »
When I did mine I toyed with idea of re using some of the bolts but in end decided to renew all the torque to yield ones, certainly added to the cost though. If I remember correct for injectors,rockers and cam caps it added about £100 on. Bloody expensive for some bolts!

I also did injectors seals,re lapped valves and fitted new stem seals. My thinking was itís in bits anyway so may aswell just bite bullet and do it. The injector bores were a bit iffy though and needed some cleaning up.

Offline christiant

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Re: LOL just a question on over heating..
« Reply #20 on: August 22, 2018, 03:54:53 PM »
The bores on my head are completely shot even though I already have new seals on them and new bolts and they don't leak, doing them again with a complete used refurbished head. Even the "new old" head has some marks on the bores but much better. Because this brought the cost up significantly just going for tensioners, belt, injector seals, injector bolts, head bolts and gasket and nothing else because I replaced it all very recently. I highly recommend checking the injector bores if taking the head out and checking the cam, as well as setting the injector lash correctly. It's russian roulette not doing it knowing these lumps and could end up needing to take it apart soon after the job.  Fingers crossed it will go as planned, going at it soon, doing the work myself.

Offline mirosti

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Re: LOL just a question on over heating..
« Reply #21 on: August 23, 2018, 07:33:12 AM »
All theese heads have 'marks', and it's imposible to find used without theese marks.
In my country, some shops inserting steel sleeves into theese nozle openings and solving problem forever.

Offline bigBri

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Re: LOL just a question on over heating..
« Reply #22 on: August 23, 2018, 03:27:23 PM »
I've found this set which I'll give too my mate, will get cam belt changed as it's there, water pump as you say only 30 quid ish..
1   x  Elring New Multi-layer steel OE Quality - 3 Hole Cylinder head gasket .
10 x  Elring OE Quality Cylinder Head stretch Bolts.
1   x  Elring OE Complete Cylinder Head Gasket Set inc manifold gaskets , oil stem cam seals etc .


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Offline bigBri

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Re: LOL just a question on over heating..
« Reply #23 on: September 04, 2018, 11:19:12 PM »
Johnny, bad news for me, my old man had a word with the mechanics he's working with atm and they've said 400 quid to take head off and look, roughly another 400 for head, the old man has bought home some bottle with a pipe that you put in expansion tank, and something about water changing colour, lol I'm not sure, anyway it'll be time for the ' bus ' to bite the dust let it go.

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Offline johnnyroper

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Re: LOL just a question on over heating..
« Reply #24 on: September 05, 2018, 01:17:43 AM »
Thatís is the sniff test it changes colour if carbon monoxide is detected in cooling system,on a PD I very much doubt it will fail unless you are revving the nuts off it as they usually only leak at high temp under load.

Shame itís gonna cost so much to repair but I know where you coming from if have to pay someone itís just not cost effective to do.

 

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