Engine Help/Advise required

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peterbradbury
Posts: 133
Joined: Wed Jan 06, 2016 17:47

Engine Help/Advise required

Post by peterbradbury »

Hi Everyone,

Those who are on the FB group will have seen the fun I've been having with my head over the last couple of weeks.

I've the following issues/symptoms after todays run to Mini in the Park

-Running Hot (no temp gauge fitted currently, but the oil pressure is dropping very low when hot approx 18-20 psi at idle)
-Just over 500ml water lost, no obvious external loss
-Rough running when cold, seems ok once warm but perhaps lacking a bit of power
-Low compression (85,80,80,85 checked when hot)
-High fuel consumption? (less sure on this, but seems higher than I got on IMMM earlier in the year. 1.5 tanks for around 200 miles)

I suspect the head is slightly warped, and its time to pull it apart again, and actually get the head checked over properly this time.

Does anyone have any thoughts before I start to strip it again?

Thanks

Peter
67 Morris Moke
Nigel(no top)Sykes
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Joined: Tue Mar 07, 2006 21:04
Location: Everywhere and nowhere baby

Re: Engine Help/Advise required

Post by Nigel(no top)Sykes »

Re the oil pressure. At idle the pressure will drop, often as low as yours does, when the engine is warm. So long as it is up at around 50ish when the engine is running at speed there isn’t a problem
If you’re only getting 18 - 20psi when the engine is revving then that IS a problem
As to the water, mine seems to loose some on long motorway thrashes, even with a header tank...I just top it up and try to remember to drain the system come winter time
Come on summer
peterbradbury
Posts: 133
Joined: Wed Jan 06, 2016 17:47

Re: Engine Help/Advise required

Post by peterbradbury »

Yes pressure builds when revving, just under 50. I'm not sure if I'm just being paranoid with all the issues I've had overheating!
67 Morris Moke
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grantourer
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Joined: Fri Dec 31, 2010 15:55
Location: Kenilworth. UK

Re: Engine Help/Advise required

Post by grantourer »

With regards to the head. Take the radiator cap off, get it up to temperature, so that the thermostat is open, and see if any large bubbles appear, if they do, you have a head problem. Usually caused by blown head gasket between cylinders 2 and 3. Will need skimming. Used this trick a couple of times.
Regards, Graham & Judith
1981 Aussie Moke
1989 Portuguese Moke
1979 Clubman Estate
peterbradbury
Posts: 133
Joined: Wed Jan 06, 2016 17:47

Re: Engine Help/Advise required

Post by peterbradbury »

Spent some time on it again today.

Compression Cold - consistent 90 across all 4. Seems low.

Run up to temperature with cap off and no bubbles.

It could all be in my head, just doesn't seem to be running as well as in Germany.
67 Morris Moke
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Wally2
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Joined: Sun Jul 29, 2012 20:02
Location: Belper, Derbyshire

Re: Engine Help/Advise required

Post by Wally2 »

Hi Peter, What fuel are you running it on?
Chris
WEEMOKE
JUX180D
peterbradbury
Posts: 133
Joined: Wed Jan 06, 2016 17:47

Re: Engine Help/Advise required

Post by peterbradbury »

I just run standard 95 stuff and always have with it.
67 Morris Moke
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Wally2
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Location: Belper, Derbyshire

Re: Engine Help/Advise required

Post by Wally2 »

I found that mine runs better on 98, usually Shell V Power or Texaco. I think that next year the UK will change the 95 to 10% ethonol which could be bad news as it corrodes rubber, so if you've got any rubber seals or tubing, it will be a problem. The 98 higher octane should stay below 5% so more reasons to use it. It is a little more expensive but I think it's worth it. Try a tank full see if it helps.
Chris
WEEMOKE
JUX180D
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