Search found 508 matches

by Tom W
Wed Sep 16, 2020 5:57 am
Forum: Technical
Topic: Which seal to use on sump gasket
Replies: 34
Views: 861
Great Britain

Re: Which seal to use on sump gasket

For what it’s worth, my experience of removing the sump was on my 4.2 series 2. I removed the crank damper, but not the reaction plate. I did remove the cover plate that goes over the bottom of the bellhousing. My car was on very sagged engine mounts at the time, which didn’t help. I disconnected th...
by Tom W
Mon Sep 14, 2020 1:37 pm
Forum: Technical
Topic: Which seal to use on sump gasket
Replies: 34
Views: 861
Great Britain

Re: Which seal to use on sump gasket

Whilst both can be done on axle stands, the balancer is easier to remove than the reaction plate. With the reaction plate removed, the sump can be offered up vertically, which should make getting the rear seal right easier. However, on axle stands, this might be a bit of a moot point as it’s a bit a...
by Tom W
Sun Sep 13, 2020 7:14 pm
Forum: Technical
Topic: Which seal to use on sump gasket
Replies: 34
Views: 861
Great Britain

Re: Which seal to use on sump gasket

You needs a proper puller to remove the harmonic balancer. They’re not expensive.
by Tom W
Sat Sep 05, 2020 3:13 pm
Forum: Technical
Topic: Distributor and starting car updated
Replies: 17
Views: 564
Great Britain

Re: Distributor and starting car updated

Is your engine actually at TDC, measured with a dial gauge or similar? If it is, then adjust the pointer so it actually points toTDC. If it isn’t, then you need to establish exactly where TDC is, then adjust the pointer and cam timing to suit.
by Tom W
Fri Sep 04, 2020 5:54 pm
Forum: Technical
Topic: S2 4.2 L engine rebuild - any other things to consider at this time?
Replies: 8
Views: 269
Great Britain

Re: S2 4.2 L engine rebuild - any other things to consider at this time?

That paint’s really suffered. So far, my original factory frame paint is intact. Has that car been repainted? Maybe restored cars are more susceptible? There does seem to be a trend to apply far more paint now than ever seemed to be used originally, probably in search for a better finish than they e...
by Tom W
Fri Sep 04, 2020 5:06 pm
Forum: Series 1
Topic: Clutch/ engine / ? Problem
Replies: 39
Views: 2163
Great Britain

Re: Clutch/ engine / ? Problem

What was the idle speed before the engine was set up?
by Tom W
Fri Sep 04, 2020 5:00 pm
Forum: Technical
Topic: S2 4.2 L engine rebuild - any other things to consider at this time?
Replies: 8
Views: 269
Great Britain

Re: S2 4.2 L engine rebuild - any other things to consider at this time?

Updated oil pumps have greater flow than the standard pump, not greater pressure. It’s the pressure relief valve and the clearances on the bearings that will affect your oil pressure. An updated pump should give a bit more pressure around idle, but as soon as the relief valve opens the pressure is c...
by Tom W
Thu Sep 03, 2020 9:53 am
Forum: Technical
Topic: Saggy Rear Suspension Debacle
Replies: 18
Views: 590
Great Britain

Re: Saggy Rear Suspension Debacle

Yes, the accuracy of pattern parts are another matter. I re-used my original springs, so haven’t compared what’s available from the various suppliers.
by Tom W
Thu Sep 03, 2020 8:15 am
Forum: Technical
Topic: Saggy Rear Suspension Debacle
Replies: 18
Views: 590
Great Britain

Re: Saggy Rear Suspension Debacle

C25939 is suitable for all 6cyl models, provided they are used with the appropriate dampers, appropriate lower spring seats and without spacers. They were introduced part way through the Series 1 4.2. The data is in the spare parts bulletins.
by Tom W
Wed Sep 02, 2020 11:52 am
Forum: Technical
Topic: Saggy Rear Suspension Debacle
Replies: 18
Views: 590
Great Britain

Re: Saggy Rear Suspension Debacle

What springs and dampers do you have on at the moment? If you look through the parts books and spares bulletins, you’ll see there were several different combinations of springs, dampers and sometimes spacers specified over the years. The spec was all settled on by the time the Series 2 was introduce...
by Tom W
Sat Aug 29, 2020 5:21 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

Glad it’s sorted. What oil pressure are you seeing now?

I think the single hole is only to let oil out of the cavity beneath the plunger. Without it, there’s a chance the valve could hydraulic lock as it was pressed down.
by Tom W
Fri Aug 28, 2020 4:20 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

Yes, worth getting hold of as a comparison, and swapping out to see if it makes any difference.
by Tom W
Fri Aug 28, 2020 3:51 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

That makes sense. I would remove the oil pressure relief valve again and thoroughly clean all the parts. Polish the piston too. If you can remove the cylinder, I’d do so and clean and polish that too. Maybe there’s a bit of crud somewhere in there that’s causing the valve to stick. It needs to be ab...
by Tom W
Fri Aug 28, 2020 10:04 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2304
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

Ignition advance will affect MPG. We’re talking insufficient advance here. Since the spark fires too late, peak cylinder pressure occurs too late in the power stroke. Some of the useful energy that could be extracted from the charge is now wasted as heat down the exhaust. To propel the car at the sa...
by Tom W
Fri Aug 28, 2020 5:49 am
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

I see from your first post the gauge is tapped into the main gallery, downstream of the filter. In that case, the filter has nothing to do with the excess pressure you’re seeing. A clogged filter would reduce pressure. Your high volume oil pump will do a couple of things. It will lower the rpm at wh...
by Tom W
Thu Aug 27, 2020 3:30 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

Good stuff, hope you find the cause. If you want to clean the cooler bypass valve, the best way is probably to remove the whole filter head and access it that way. It’s visible with the filter head on the bench, without removing the brass plug. The plug’s more for closing the access drilling that’s ...
by Tom W
Thu Aug 27, 2020 2:51 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

You’ve just replied as I’ve been writing this, so I’ll amend it to try and include answers to your question. As both gauges show the same behaviour, then I think you’re right to assume the it is representative of what’s happening in the engine. How many miles have you done on the engine before this ...
by Tom W
Thu Aug 27, 2020 6:33 am
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 575
Great Britain

Re: Erratic Oil pressure- gauge/pressure

This is puzzling. I’m not sure adding washers or stretching the spring is the right answer. The oil pump creates flow. Oil pressure is generated as there’s a difference in rate at which the oil can flow out of the bearing clearances, compared to the rate the pump supplies it. The pressure relief val...
by Tom W
Wed Aug 26, 2020 11:09 am
Forum: Series 2
Topic: Cooling fan wiring
Replies: 2
Views: 150
Great Britain

Re: Cooling fan wiring

Great, thanks
by Tom W
Tue Aug 25, 2020 9:52 pm
Forum: Series 2
Topic: Cooling fan wiring
Replies: 2
Views: 150
Great Britain

Cooling fan wiring

Hi everyone

The series 2 wiring diagram shows there’s an inline bullet connector in the 12v feed wire between fuse 6 and the cooling fan relay. Where is this connector located? I seem to have lost power between the fuse and the relay, and checking here seems a good place to start.