bl1300
Posted a lot
Posts: 1,678
|
|
Nov 20, 2011 19:08:42 GMT
|
|
Ive noticed over the last couple of days that my Triumph 1300 has started to take some time to build up oil pressure in the mornings.
This morning oil light stayed on for about a second after the engine fired and the cappilary pressure gauge confirmed no pressure for the same lenth of time before jumping to 15psi and then building all the way up to 80psi (fast idle)
Pressure reads 80psi when cold whatever the engine speed.
60psi on the move with a warm engine
and 40psi on idle.
Those seam ok to me but possibly a little on the high side.
Now the worrying thing when the engine first starts for a second or two it sounds like a bag of nails with a definate knocking noise.
All this is concerning me of big end wear which I really really hope it isn't as on this car getting to the crankshaft really is an absolute 2£%£ of a job!!
What do you think big ends or something less serious?
p.s. once up and running this engine has plenty of power no knocking noises and is smooth and economical. Its just this slow pressure build up thats bothering me
|
| |
Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
|
|
|
|
|
Nov 20, 2011 19:30:16 GMT
|
|
This is a pretty normal state of affairs for the 4 cyl triumphs and due in large part to the oil filter being mounted pointing downwards. This lets the oil filter drain when standing, meaning the oil pump must fill it again before pressure builds.
You should have a filter with a non-return flap fitted to minimise drain-down. However, even if you do, I've found that some work better than others, with no particular correlation with brand.
The fact that you get noise while waiting for the oil to arrive does indicate some wear to the bearings, but needn't mean the engine is shot - they'll go on a long time like this, provided you are kind to them on starting and keep the rev's to a minimum until the oil light is out. Some like to spin the engine with the choke in for a while to get the pressure built up before starting. Need a strong battery for that trick.
The 6 cyl engines have similar issues which can usually be sorted by fitting a spin-on filter conversion.
Cheers
Nick
|
| |
1967 Triumph Vitesse convertible (old friend)
1996 Audi A6 2.5 TDI Avant (still durability testing)
1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
|
|
oldchap
Part of things
just hanging about
Posts: 202
|
|
Nov 20, 2011 19:35:38 GMT
|
This is a pretty normal state of affairs for the 4 cyl triumphs and due in large part to the oil filter being mounted pointing downwards. This lets the oil filter drain when standing, meaning the oil pump must fill it again before pressure builds. You should have a filter with a non-return flap fitted to minimise drain-down. However, even if you do, I've found that some work better than others, with no particular correlation with brand. The fact that you get noise while waiting for the oil to arrive does indicate some wear to the bearings, but needn't mean the engine is shot - they'll go on a long time like this, provided you are kind to them on starting and keep the rev's to a minimum until the oil light is out. Some like to spin the engine with the choke in for a while to get the pressure built up before starting. Need a strong battery for that trick. The 6 cyl engines have similar issues which can usually be sorted by fitting a spin-on filter conversion. Cheers Nick I agree with all of the above plus the oil will be thicker now that the mornings are getting colder, also it is worthwhile to make sure you are using the correct grade of oil. Some of the modern oils do not suit older engines |
| |
what's that awful noise
|
|
bl1300
Posted a lot
Posts: 1,678
|
|
Nov 20, 2011 20:30:47 GMT
|
|
Tis using Halfords Classic 20W50. As for revving whilst knocking wouldn't get the chance its only one about 3 crank revolutions.
|
| |
Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
|
|
RetroMat
Posted a lot
Column Shifting!
Posts: 3,444
|
|
Nov 20, 2011 20:41:17 GMT
|
If its completley from cold I give my toledo a 5-10 sec crank over with the starter no choke to get the oil circulating a bit! Your oil pressure reading sound similar to mine i've found mine can drop to 15 psi after a long run, still a heathy engine though  |
| |
|
|
bl1300
Posted a lot
Posts: 1,678
|
|
Nov 20, 2011 20:45:43 GMT
|
If its completley from cold I give my toledo a 5-10 sec crank over with the starter no choke to get the oil circulating a bit! Your oil pressure reading sound similar to mine i've found mine can drop to 15 psi after a long run, still a heathy engine though Mine used to drop that low in the same circumstance and had one of those external rocker feeds fitted. I took it off as I felt that the top end was far easier to repair than the bottom end and not being a race car it really wasn't nesesary. Now the pressure doesn't drop below 25psi even after an hour long motorway blast at 70mph (hoofing it in a 1300FWD cause of the low gearing 4500rpm) |
| |
Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
|
|
RetroMat
Posted a lot
Column Shifting!
Posts: 3,444
|
|
Nov 20, 2011 20:54:17 GMT
|
|
yeah I've got the rocker feed fitted might I found it improved oil pressure slightly after a long high speed cruise, only by a few psi mind. Fwd gearing sound pretty similar to the toledo/dolly 1300
|
| |
|
|
|
|
|
Nov 20, 2011 23:01:25 GMT
|
I was warned when I got my Triumph 2000 that the oil filters without the non-return flap would cause oil starvation at start-up. Ended up buying filters & service items from a Triumph specialist and had no problems. Some of the Nissan turbo tuners use a gizmo to pre-lube the motor before start-up  Very likely overkill and should not be needed on a healthy engine but it's good to know what your option are. ;D Google "Oil Pressure Accumulator", site below has a good explanation. Basically you store oil under pressure when the engine is running and release it back into the lubrication system just before start-up www.thinkauto.com/accumulators.htmShould be worth some brownie points under the bonnet, especially if you paint it red with "Nitrous" on it ;D |
| |
|
|
