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-   -   Split liner / head gasket symptoms (https://www.volvoforums.org.uk/showthread.php?t=299378)

craigoodwood Oct 9th, 2019 22:38

Split liner / head gasket symptoms
 
Long time no post eh....
I'm fast approaching 7 years of ownership with this 850, it passed it's mot again in August needing two wishbones and no advisories and I'm still very much in love yesterday however it decided to test my loyalty and I canny just figure what is wrong with it or what direction to take it...
Travelling home from work as normal, happened upon a tractor and got past as normal 3rd gear 6k while the opportunity was there no problem, few miles down the road traffic had stopped as did I and the car was vibrating and when I could move in wot in 1st and it was misfiring terrible so nursed it home with the misfire and vibration still evident, left it running when I pulled up checked exhaust sounded and smelt normal..... popped the bonnet all looked normal reved lightly seemed fine rev hard it misfires, water water a little low but not below min and oil level fine with normal moisture on dips tickets but pcs was due to be changed in the coming weeks so I left it....
Checked water before I left for work it hadn't moved started it up normal sounding no misfire, tootled down the road and had slight misfire which got noticeably worse once warm, got to work and pulled each plug lead, each injector lead and maf plug off and none made a difference and the top radiator hose was pressurised..... I did get the cap off and it gave a big gurgle but no oil evident in there and no obvious water on dipstick.... drive home similar misfire, vibration but full boost and no signs of smoke.

So if you've managed to read through all that, Google has came up with no exact match so my train of thought is...
Split liner
Head gasket
Bent rod
Snapped cam

but I'm stumped and I don't just know which direction to go now so any input at this point is helpful, by the way it's still the same 95 t5 manual no engine mods bar a 16t cheers craig

craigoodwood Oct 9th, 2019 22:46

I didn't mean to put it in the sales section :bricks:

chelle_belle Oct 14th, 2019 23:48

May be a compression test would be a good place to start, keep us posted.

Craig.

laurence Oct 17th, 2019 22:09

radiator

craigoodwood Jan 20th, 2020 19:59

Just thought I best update this, my original train of thought was way off, I'm now 98% convinced it's the gearbox.... I'm just waiting on my savings to build up for the clutch kit and pcv kit :shades_smile:

harveys Jan 20th, 2020 20:23

Has it had a replacement water pump ?.
Some of the cheaper pumps have plastic impellers that can fail .
If cars ok when cold but plays up when hot ? does the heater get hot ? rad hoses both getting hot?.

craigoodwood Jan 21st, 2020 07:37

😄 Yeah no im certain it's no longer a misfire, it's a vibration that feels like a misfire :)

DaveNP Jan 21st, 2020 09:04

Are your engine mounts OK? not had it myself but a number of people have had odd vibration symptoms due to them.

acshortt5 Jan 21st, 2020 19:40

Check the cheap stuff first: your lower intercooler boost hose. The clip rusts and eventually breaks making it possible for the hose to pop off when under boost which then leads to poor idle conditions.

craigoodwood Jan 26th, 2020 20:28

Quote:

Originally Posted by DaveNP (Post 2591555)
Are your engine mounts OK? not had it myself but a number of people have had odd vibration symptoms due to them.

Yeah I have thought that too but it also really doesn't compute with it also not wanting to change up the gears....


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