Trying to ID cause of cooling system issue 1.9DG
Posted: 28 Nov 2024, 13:36
Hi All,
Fitted a re-con engine from VW Engine Co. a bit over 2 years ago to my Holdsworth Villa III 1.9DG, but I've now got pressure & gas build up in coolant (when cold). So likely blowing exhaust past the upper seal rings. The van drvies ok, until I have to stop and bleed the rad after half an hour, so this issue needs fixing. I listed the van for sale a couple of weeks back (on this site), as I'm trying to finish doing a full time degree, which is leaving me skint and with no time to work on it. But it's not had much interest and then my son found out... "Dad, you can't sell the van!" So upshot is he's persuaded me I absolutely MUST take the engine out and fix it myself.
So... I can drop the engine out, and reckon I'll send it to VW Engine Co. to pressure test & analyse where the exhaust blowing from and rebuild top end, BUT... It's had a head issue before (coolant from rubber gasket) - 18 months after the new engine was fitted) I think there's an underlying cooling problem. I've replaced the cooling system bit-by-bit - new rad, steel pipes, thermostat, thermostat housing, temp sensor (since broken), lower temp (Golf) fan thermoswitch, etc and flushed the coolant system twice (and did my best to check for blockages), the rad fan kicks in fine. But I think (guesswork) it's overheated on the nearside head and that's cause the leaks both time. Once I've got the engine back in, is there anyone I can take it to in the Bristol area who could look over it with me and test the system? I'd be glad to pay someone local to Bristol to give me a hand with this but can't afford big garage bills at the minute, so won't be taking it to one of the two Bristol Specialists.
I've had it 8 years and put an LPG system on 7 years ago - it ran fine on LPG for many years but I mostly run on petrol now as it's hard to get LPG locally. I did wonder if the LPG vaporiser unit which draws heat from the n/s head coolant pipe could be causing an issue, or whether I could have a failing water pump (but can't see how this could be the problem if it warms up quick, runs ok and fan kicks in and out on cue).
Any suggestions for causes or local help to either put the engine back in or to check over my work (or even to help me top-end rebuild rather than send to VWEC), gratefully received. As I said, happy to pay for your time. Either post back or drop me line on 0770 409 0183)
Cheers,
Ben
1987 T25 Holdsworth Villa III 1.9DG
Fitted a re-con engine from VW Engine Co. a bit over 2 years ago to my Holdsworth Villa III 1.9DG, but I've now got pressure & gas build up in coolant (when cold). So likely blowing exhaust past the upper seal rings. The van drvies ok, until I have to stop and bleed the rad after half an hour, so this issue needs fixing. I listed the van for sale a couple of weeks back (on this site), as I'm trying to finish doing a full time degree, which is leaving me skint and with no time to work on it. But it's not had much interest and then my son found out... "Dad, you can't sell the van!" So upshot is he's persuaded me I absolutely MUST take the engine out and fix it myself.
So... I can drop the engine out, and reckon I'll send it to VW Engine Co. to pressure test & analyse where the exhaust blowing from and rebuild top end, BUT... It's had a head issue before (coolant from rubber gasket) - 18 months after the new engine was fitted) I think there's an underlying cooling problem. I've replaced the cooling system bit-by-bit - new rad, steel pipes, thermostat, thermostat housing, temp sensor (since broken), lower temp (Golf) fan thermoswitch, etc and flushed the coolant system twice (and did my best to check for blockages), the rad fan kicks in fine. But I think (guesswork) it's overheated on the nearside head and that's cause the leaks both time. Once I've got the engine back in, is there anyone I can take it to in the Bristol area who could look over it with me and test the system? I'd be glad to pay someone local to Bristol to give me a hand with this but can't afford big garage bills at the minute, so won't be taking it to one of the two Bristol Specialists.
I've had it 8 years and put an LPG system on 7 years ago - it ran fine on LPG for many years but I mostly run on petrol now as it's hard to get LPG locally. I did wonder if the LPG vaporiser unit which draws heat from the n/s head coolant pipe could be causing an issue, or whether I could have a failing water pump (but can't see how this could be the problem if it warms up quick, runs ok and fan kicks in and out on cue).
Any suggestions for causes or local help to either put the engine back in or to check over my work (or even to help me top-end rebuild rather than send to VWEC), gratefully received. As I said, happy to pay for your time. Either post back or drop me line on 0770 409 0183)
Cheers,
Ben
1987 T25 Holdsworth Villa III 1.9DG