oil leak help

General Technical Questions and Answers last answered over 1 year ago.
You may also want to visit the Wiki(pedia) for a more structured index of T25 repair, maintenance, technical and ownership topics

Moderators: User administrators, Moderators

Locked
Johnmck
Registered user
Posts: 45
Joined: 24 Oct 2005, 16:57
80-90 Mem No: 1622
Location: St Annes, Lancs

oil leak help

Post by Johnmck »

Hi , got a CU Aircooled and problem with oil leaking. Hada small leak for a while , but now is leaking a fair bit once engine warm. Oil appears to be coming from above the push rod tubes , poss oil cooler?
Any ideas what might be cause and how to go about solving it?
Can it be sorted with engine in place or will it need to come out?
John
Member No 1622
Air cooled devon

OLD ONE
Registered user
Posts: 569
Joined: 27 Jun 2006, 10:38
80-90 Mem No: 1737
Location: ESSEX

oil leak help

Post by OLD ONE »

Sounds like it may be crank pressure. If you remove the dip stick do you get vapor or oil pumping out of the dip stick tube? If this is the case, you may have a problem with piston rings or valve guides. Or it may simply be the crank case breather bunged up . I hope it is the latter.
Health has now stopped me camping Etc.

User avatar
CovKid
Trader
Posts: 8411
Joined: 30 Apr 2006, 13:19
80-90 Mem No: 3529
Location: Ralph - Coventry (Retired)
Contact:

Post by CovKid »

Or just leaks generally. ChickenKoop has the same engine and had smelly heaters as a result (much to his wifes annoyance). We just pulled the engine out and replaced all suspect gaskets - bit of fiddling with the pushrod tube seals but he's leak free now. When seals start to perish, they generally all start to pack up at the same time.

User avatar
chickenkoop
Registered user
Posts: 114
Joined: 01 Dec 2005, 20:32
80-90 Mem No: 2180
Location: Whitley, COVENTRY membership No. 2180

Post by chickenkoop »

:D he's right the smell was bad, re gasket it, it worked wonders for me, and saved the ear bashing,

User avatar
CovKid
Trader
Posts: 8411
Joined: 30 Apr 2006, 13:19
80-90 Mem No: 3529
Location: Ralph - Coventry (Retired)
Contact:

Post by CovKid »

And after we'd regasketted ChickenKoop, we did his engine :lol:

Johnmck
Registered user
Posts: 45
Joined: 24 Oct 2005, 16:57
80-90 Mem No: 1622
Location: St Annes, Lancs

Post by Johnmck »

Thanks - looks like it engine out and lots of new gasgetts
John
Member No 1622
Air cooled devon

User avatar
CovKid
Trader
Posts: 8411
Joined: 30 Apr 2006, 13:19
80-90 Mem No: 3529
Location: Ralph - Coventry (Retired)
Contact:

Post by CovKid »

Oil cooler a bit of a pig to get to as its under all the tinware but this too has a couple of rubber seals. Its sometimes a good excuse for a de-grit, repaint (rusty tinware) and regasket. Check there are no leaks from base of barrels too - they can sometimes be a cause of leaks, though you'll need a piston ring compressor (or two jubilee clips screwed end to end) to get the barrels back on after. Not a HARD job as long as you plod along over a mug of tea.

Johnmck
Registered user
Posts: 45
Joined: 24 Oct 2005, 16:57
80-90 Mem No: 1622
Location: St Annes, Lancs

oil leak problem worse- now warning light on!!!

Post by Johnmck »

Hi just got worse. I claened off all the gunk underneath with some engine cleaner and now have oil warning light glowing when engine running. It is not as bright as when ignition is turned on. Was going to take bus to garage to get leak/seals fixed, but not now with oil light on.
Any ideas?
John
Member No 1622
Air cooled devon

User avatar
CovKid
Trader
Posts: 8411
Joined: 30 Apr 2006, 13:19
80-90 Mem No: 3529
Location: Ralph - Coventry (Retired)
Contact:

Post by CovKid »

May just have created a non-existent or faulty connection to the sensor during cleaning. Pity you don't live near me and chicknKoop I reckon we could drop engine and regasket in a day.

Its not THAT bad a job to do yourself to be honest. Two-ton trolley jack to support it whilst you undo the four bolts holding it in (plus petrol pipe, throttle and cables), pull engine, put it at working height (workmate is good) then regasket. Haynes manual is ok if you're not up to speed.

SlowWest
Registered user
Posts: 24
Joined: 16 Oct 2006, 10:12
80-90 Mem No: 2070
Location: Rochester, Kent

Post by SlowWest »

had a similar problem, oil filter got replaced, still leaks a bit around the oil filter but it is just a teaspoon of oil every day.

Engine is a 1981 CU btw
2070, I think

Locked