The Triumph Dolomite Club - Discussion Forum

I did have one thought. I know its quite unusual to happen on an 1850, but have the crank thrust washers dropped out ? Does the crankshaft pulley move in and out at all ? Probably best tried from underneath.
There again, is this clutch / flywheel related ? Does depressing the clutch pedal change things at all when the rattle occurs ?
Tony.

Hi tony, it's an auto 1850.
Rich

This is unlikely in an 1850 and even less so with an autobox. It would be worth checking for endfloat on the crank pulley to be certain just to eliminate the possibility.

On the OHV engines with this problem, you can see the crank pulley move back and forth as the clutch is operated.

Toledo Man wrote:This is unlikely in an 1850 and even less so with an autobox. It would be worth checking for endfloat on the crank pulley to be certain just to eliminate the possibility.

On the OHV engines with this problem, you can see the crank pulley move back and forth as the clutch is operated.

On a manual the thrust bearings have the most wear when the clutch is operated. At normal running only at accelerating and deccelerating because of the weight of the cranckshaft but that is not much. The converter of an autobox does push itself from the gearbox all the time because of the oilflow between the rotor and stator. The thrust bearings do wear more on an autobox.

Jeroen

I see where you're coming from but the flex plate on an auto is lighter than the equivalent flywheel but that could be offset by a torque converter full of ATF...

Ok Guys, Bruce came round today and has pinpointed the noise to top of water pump by listening using a screwdriver, Also spotted some oil seepage in that area so also possibly head gasket, Head seems to be torqued down ok, so it's water pump area. it's definitely quieter over the other side of engine and bottom end. Any other ideas on possible problems between cylinders 1 & 2? Have started the strip down and got as far as the water pump impeller but haven't got a spanner that fits does anyone know the size of the nut?
Cheers Rich

THIS might be of help to you. It was also reproduced in the "members only" section. One thing to be aware of is the bypass tube from the manifold to the water pump. This can leak once it has been disturbed. I must've got lucky with mine when I did an inlet manifold swap back in 2008. If you're careful it should be fine.

Help required chaps! When the water pump cover is off, if you grab the impellor and try to rotate I back and forth, should it feel notchy?

I appreciate some backlash should be there, but notchiness?

The pump comes out cleanly, and appears to have been put together with too thin a gasket.

Bruce
It's not ones of those water pumps that there was problems with years ago where the gears weren't sufficiently hardened is it? Sorry I can't remember what the symptoms were, no doubt someone with a better memory will
I dread to even suggest this, hopefully its not the jackshaft bearing.
Ian

Is this of any help Bruce?


I hope the jackshaft isn't the problem...

Bruce/Rich, turning the impeller should only allow a small movement with the engine and jackshaft still. I would check the impeller is not turning on the shaft slightly as the splines are very fine and can slip. When the pump/shaft is removed are the teeth nice and blunt or have a sharp feel to them? if the pump shaft bush (in the block) is worn this can lead to gear wear on both jackshaft and and w/pump shaft. If I can get away on Saturday I'll pop over for a butchers Rich. (I have some bits to return to Bruce also )

Tony

Tony
. Thanks for that, I'd appreciate a second opinion if possible.

. The teeth feel ok, but to my eyes, the wear pattern looks a bit odd.

. I've sourced another pump to try dropping in, and see if it feels the same.

. We're taking the head off anyway, as there is an oil leak below the inlet manifold, we're a bit concerned about the amount of silicon in there!

Great Tony, even with my limited knowledge something not quite right there as Bruce describes! Head got to come off as well due to some oil waterfall going on between cylinder 1 & 2!
Cheers Rich..

Ok is the oil leak not coming from the slot in the block under the water pump?

Tony

Looks like a historic leak from head gasket, previous owner had packed in cloths there!