Club 80-90 Forums

Morning all, im hopping that you folk can point me in the right direction here. Got 2 issues with my t25 at the moment so here goes.

1) Have done a full service on the engine 2.0 Aircooled, new plugs , points, etc, dropped oil, cleaned strainer, new filter etc, yet after a few miles of running the oil light begins to flicker on and off. checked oil levels all ok, but on it goes. im thinking that either oil sender unit playing up or pressure swith.

2) After running the engine seems to get really hot, you turn off and it wont start again, its like the battery has discharged, can hear it trying but no go, leave it to cool down and it fires first time.

Apart from that its great, came back from camperjam yesterday on the m6 at a steady 50, so when it runs it runs ok.

look forward to your comments and help.

ta.

Is the engine turning over at all when realy hot? It's not ceasing up is it? i had a fiat that did that, once it was cooled it started fine but was jammed up when hot


As for oil pressure, that could explain the above. The oil is part of the cooling on these engines with a fair sized oil cooler in the tinware below the dizzy.


Have you got a full set of tinware to direct the cold air around the cylinder heads??

Engine will try to turn over but not fire.will go with a bump start.all tinware is in place.

Oh no

That was exactly the same as mine and had to get a recon. How hot is hot, after running for a while can you touch the end of the dipstick?

are you using 20/50 oil

Is the oil cooler covered in crap?
Is all the tinware and engine seal in place?

Bye the way i still have similar problems with my van after spending 1300 quid on it

Albert

Let just say the dip stick was boling hot.ill check the oil cooler for crap though.

have you tried running it without the rocker cover on just for a minute to see if oil is getting around the engine or install a oil pressure guage to moniter pressure

Looks like I have a busy weekend coming up, will give that a try, ta very much.

sorry but a lot of the above is carp these engines run extremely hot in warm weather, the starting issue is probably just crap connections on the leads to the starter and more importantly on the earth strap between the chassis and gearbox. it's also a classic sign that your starter motor is weak as they always work better cold. the other thing of course is the bronze bush that supports the engine end of the starter motor shaft which again acts up most when things are hot.it costs pennies and causes many heartaches when worn out.
make sure you run it with a nice fast idle as it helps with the cooling and oil pressure. change the pressure switch on the engine first to see if that keeps the light off.

if someone can show me an Aircooled that won't scald you with its oil in this weather i'll have a dozen of them. i think they were designed to work in excess of 100deg as normal
btw what oil did you put in? 15/40 mineral oil is the most widely available that will do but monograde sae30 is the correct stuff. semi synthetics etc are a complete no no.
good luck with it.
and fer gawds sake fill yer profile in so folks know where you are!! there may be an expert living in the next street who could pop round and help

thanks for the heads up. for the record im using the same oil as im my 73 bay window, so should run at same temp (right or wrong on this one ) . Will give the straps a good looking at and see what state they are in. oil pressure switch will pick one up at weekend, and how do i sort my profile out, gulp dont shout

also you should not have a points dizzy in it. if its an 009 it wont be doing you any favours

jason k wrote:also you should not have a points dizzy in it. if its an 009 it wont be doing you any favours

the haynes manual shows a points dizzy option, not an 009 tho

Also check to see whether you have a genuine t25 2ltr and not a bay 2ltr in t25 tinware as the two engine are timed differently
a 2 ltr CU timed at 4-6 degs after tdc (t25 gen engine)vacumn hoses on
or cv,ce cj timed at 7.5 before tdc vac hoses off
or cv timed at 6.5 to 8.5 before tdc vac hoses off.

if your timings out then you engine will run hotter be poor on mpg and be slow

a good CU will pull 80mph plus and return low twenty's mpg on a run

oils
sae 20w 50, 20w 40, 15w 50, 15w,40 only (taken from dealership spec sheets)

do check oil pressure and circulation as oil pumps do fail but are replaceable as was suggested futher up check oil is getting up to the rocker box.

remember when these have a oil temp gauge fitted they show up to 120 degs c in the oil which unlike water is not pressurised. When running at cruising speed you should be getting about 80-90 degs C

regards doug

Many thanks for the replies guys, will get my investigation head on and see what happening here. ta for this.