Ben's (an emotional quandry) 1975 SE5a

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Ben's (an emotional quandry) 1975 SE5a

Post by scimjim » Fri Dec 07, 2018 9:13 am

Doesn’t sound like a PRV problem but you can push the spring when the sump is off to check it’s moving smoothly.

What spec is the running in oil? It comes in various viscosities.


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Ben's (an emotional quandry) 1975 SE5a

Post by AJL Electronics » Fri Dec 07, 2018 9:49 am

A quick and easy test is to replace the oil filter. Might save all that work! If not, you have a spare ready primed for next time.


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Ben's (an emotional quandry) 1975 SE5a

Post by Old and Slow » Fri Dec 07, 2018 10:38 am

The only time something similar happened to me was when they rebuilt the crank (reground 30 thou undersize) and fitted standard shells. Hope it isn't this.


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Ben's (an emotional quandry) 1975 SE5a

Post by roymck » Fri Dec 07, 2018 1:05 pm

Some engines have oversized main bearings housings by 15 thou line bored by Ford to reclaim blocks that might otherwise have been scrapped . These need special main bearing shells to fit the oversized block, fit a standard shell you will have problems.
Hope that’s not your problem ?



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Ben's (an emotional quandry) 1975 SE5a

Post by scmarf » Mon Dec 10, 2018 1:49 pm

Update:
Dropped sump and swapped oil pump for old one ; no change.
Dropped sump again and fitted new oil pump back in and filled with 20/50 : marginal increase but still down to about 10psi at 2500rpm hot.

To do:
1) swap oil filter
2) swap oil gauge
3) plastigage on bearings (not sure if it works on main bearings in situ as the crankshaft would be constrained by its own weight plus external loads)

Didn't notice any clearances when assembling crank.

What am I missing?


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Ben's (an emotional quandry) 1975 SE5a

Post by scimjim » Mon Dec 10, 2018 1:51 pm

Swap gauge just to check? It’s low across the whole range, so it may possibly be the gauge.


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Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
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1300 SS1 (Number One) & Sarah's coupe.
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Ben's (an emotional quandry) 1975 SE5a

Post by scmarf » Mon Dec 10, 2018 3:49 pm

Just swapped gauge and hose (admittedly for another old gauge) - no difference.
Just swapped filter - no difference.

Next, swap gauge from the one out of the 6a.

After that, :?:


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Ben's (an emotional quandry) 1975 SE5a

Post by philhoward » Mon Dec 10, 2018 3:51 pm

How did the pickup look? Any signs of a hairline crack (normally where the bracket is)?

Chances of 2 gauges being equally duff is very slim to be honest.


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Ben's (an emotional quandry) 1975 SE5a

Post by Coupe Racing » Mon Dec 10, 2018 4:06 pm

Have you replaced the camshaft bearings


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Post by scmarf » Mon Dec 10, 2018 4:35 pm

philhoward wrote:
Mon Dec 10, 2018 3:51 pm
How did the pickup look? Any signs of a hairline crack (normally where the bracket is)?

Chances of 2 gauges being equally duff is very slim to be honest.
Couldn't see any problems and I looked pretty closely.
Coupe Racing wrote:
Mon Dec 10, 2018 4:06 pm
Have you replaced the camshaft bearings
No. Original camshaft re-ground so assumed not a problem. :?:


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1977 SE6a, previously 1985 1300 SS1
Worlds longest coupe restoration
Chief mechanic for offspring's fleet (SE5a, Bond Equipe, Ford Focus)

Henry Royce: "The quality remains long after the price is forgotten"

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Ben's (an emotional quandry) 1975 SE5a

Post by Coupe Racing » Mon Dec 10, 2018 5:02 pm

Is the block flat where the pump is mounted
I'm with some others ref the pick up pipe leaking


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Ben's (an emotional quandry) 1975 SE5a

Post by scmarf » Mon Dec 10, 2018 6:56 pm

Coupe Racing wrote:
Mon Dec 10, 2018 5:02 pm
Is the block flat where the pump is mounted
I'm with some others ref the pick up pipe leaking
Yes.
I can only say I gave the pick-up a thorough examination on initial fitting and again on Friday before re-fitting the third time.

Tomorrow I will drop the sump for the third time and check bearing sizes. Those are the only things that have been changed and not checked now. Although I trust my engine man, I really don't know what else to check now.


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1977 SE6a, previously 1985 1300 SS1
Worlds longest coupe restoration
Chief mechanic for offspring's fleet (SE5a, Bond Equipe, Ford Focus)

Henry Royce: "The quality remains long after the price is forgotten"

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Ben's (an emotional quandry) 1975 SE5a

Post by Coupe Racing » Mon Dec 10, 2018 7:46 pm

Taken from the manual , might be worth a read
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Ben's (an emotional quandry) 1975 SE5a

Post by Coupe Racing » Mon Dec 10, 2018 7:48 pm

Part 1
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Ben's (an emotional quandry) 1975 SE5a

Post by Coupe Racing » Mon Dec 10, 2018 7:49 pm

Part 2
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