Overheating SE5a got me thinking about my 6a...

Discuss and exchange views and technical information about our cars.

Moderators: scimjim, Roger Pennington, philhoward, Lukeyboy46, erikscimitardemon

Post Reply
yosini
Posts: 18
Joined: Tue Dec 19, 2017 12:31 pm

Overheating SE5a got me thinking about my 6a...

Post by yosini » Sun Dec 29, 2019 11:03 pm

Hi,

Just reading the previous post about the potential inaccuracy of gauges and it made me think; so many people (myself included) worry unduly about what the temp gauge says when it would be great if someone could post actual proper laser measurer temps from different parts of the engine for us to check against. I have one of these laser measures and aside from being quite cheap on Amazon, or wherever, they are super useful. I now know my Cerbera runs about 5 degrees less than what the gauge reads and my Interceptor 10 degrees less. Panics over. My 6a runs just around 95-100 all day long summer or winter so I just assume that it is healthy and happy and probably a crappy gauge, it would be good to get that reassurance though....So if anyone can post some laser readings from their 6's that would be useful. Also my petrol gauge is empty when just under 1/4 full so I'm intrigued by this voltage regulator thing.....

Cheers

Joe


1963 Daimler Dart
1968 Jensen Interceptor
1969 Rover P6 3500
1972 Maserati Indy
1972 TVR Vixen
1974 Lotus Elan +2 130/5
1977 Scimitar SE6A
1980 VW T25 Campervan
1981 VW T25 Campervan
1988 Toyota Hilux pickup
1996 TVR Cerbera AJP 4.2
1999 Subaru Impreza Turbo Sportswagon
2003 Smart Roadster

User avatar
scimjim
RSSOC Member
Posts: 40486
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester

Overheating SE5a got me thinking about my 6a...

Post by scimjim » Sun Dec 29, 2019 11:17 pm

I checked the gauge accuracy against a laser temp gun pointed at the temp sender. You could compare against other points on the engine if you suspect a blockage, but that won’t tell you anything when you’re driving.

The fuel and temp gauges are both fed 10v from a voltage stabiliser rather than the 12v nominal from the battery/alternator. The gauges are identical inside, and both can be adjusted to calibrate against the senders (details in the wiki).


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

old bean
Posts: 257
Joined: Tue Aug 31, 2010 12:28 am

Overheating SE5a got me thinking about my 6a...

Post by old bean » Sun Dec 29, 2019 11:24 pm

This may sound nuts but I know the smelll of the engines in my Reliants so well that if ever they've running hot my nose always picks it up.. I've been known (but hopefully not seen) to sniff various parts of my cars on a regular basis, exhausts, manifolds, carbs, fuel lines, coolant, tyres and even the odd seat after a bit of sporting action.. :shock:

How sad am I? :)



rebel alliance
Posts: 1231
Joined: Thu Mar 03, 2016 9:20 pm

Overheating SE5a got me thinking about my 6a...

Post by rebel alliance » Mon Dec 30, 2019 12:38 am

Did you buy the Kitten ?



mark rudder
RSSOC Member
Posts: 170
Joined: Thu Dec 21, 2017 6:05 am

Overheating SE5a got me thinking about my 6a...

Post by mark rudder » Mon Dec 30, 2019 2:31 am

Joe.
My 6B runs out of fuel at 1/4 gauge & overflows at just over 3/4, the temp gauge is spot on, go figure.


Mark from down under.
Current GTE 6B, Scirocco R. Past Dolomite Sprint, XJS (manual), V12 E-type (manual, convertible, lovely) 350 chev XJ6, TR6, TR4, Sprite, Midget, local Ford V8s, others... There's a pattern here.….

User avatar
philhoward
RSSOC Member
Posts: 27589
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Contact:

Overheating SE5a got me thinking about my 6a...

Post by philhoward » Mon Dec 30, 2019 5:32 am

Replace the current temperature gauge with this type:
A660778C-5774-48B1-A3D0-66A981917006.jpeg
A660778C-5774-48B1-A3D0-66A981917006.jpeg (71 KiB) Viewed 1545 times
Problem solved. Worked for Jaguar with cars equipped with the V12 in the 1970’s.


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
SS1 Racer
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

willholderogri
RSSOC Member
Posts: 1270
Joined: Sat Aug 21, 2010 10:47 pm
Location: chippenham

Overheating SE5a got me thinking about my 6a...

Post by willholderogri » Mon Dec 30, 2019 7:18 am

I use a new fangled digital guage it tells me every little degree difference


1962 mini, bedford CA , KR200. morris 1000, mini pickup.several escorts,ford grandad.ford cortina X2 ,astra, SE5A x 2 ,ford focus.

gtcse8
RSSOC Member
Posts: 3079
Joined: Fri Apr 24, 2009 10:11 am
Location: Steeton, Yorkshire Dales

Overheating SE5a got me thinking about my 6a...

Post by gtcse8 » Mon Dec 30, 2019 8:17 am

Mark your fuel gauge float arm is not at the right angle.
All the other gauges are set nominally at the smiths factory and very rarely go out of adjustment.
The float arm bounces about inside the tank, and I have replaced them only to find a small amount of petrol inside the float :evil:


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

b.c.flat hat
RSSOC Member
Posts: 2350
Joined: Tue Aug 28, 2007 6:29 pm
Location: St. Martins, Oswestry.

Overheating SE5a got me thinking about my 6a...

Post by b.c.flat hat » Mon Dec 30, 2019 8:45 am

If you use yer Scim daily, yer git used t' where needles usually point regardless o' actual measurement. Disregard completely yer fuel gauge an' go by the trip meter instead, yer'll know 'ow many miles Scim will do twix fill-ups.

Oh, yer doosn't use it every day? Chuffin' 'eck, the fun yer missin'.😳😁😎😜



User avatar
TrevorG
RSSOC Member
Posts: 785
Joined: Fri Aug 24, 2012 9:09 am
Location: Thomas chapel in Pembrokeshire

Overheating SE5a got me thinking about my 6a...

Post by TrevorG » Mon Dec 30, 2019 10:39 am

Old bean.....I'm totally with you on that. Mind you, I'm having to learn the scimitar again, now I've enamelled the block and ceramic coated the exhaust manifolds. It's all different to get used to.

Here's another one....when I was racing velos and dukes, I was also getting feedback from the clicks and graunches as the engines warmed. (Engines, not gearboxes.....the latter was dumb rider). Aren't we a bit weird!



willholderogri
RSSOC Member
Posts: 1270
Joined: Sat Aug 21, 2010 10:47 pm
Location: chippenham

Overheating SE5a got me thinking about my 6a...

Post by willholderogri » Mon Dec 30, 2019 3:51 pm

Must be an age thing I always listen to my bikes and my car .


1962 mini, bedford CA , KR200. morris 1000, mini pickup.several escorts,ford grandad.ford cortina X2 ,astra, SE5A x 2 ,ford focus.

User avatar
Dennis Nicholas
RSSOC Member
Posts: 764
Joined: Wed Jun 20, 2007 1:22 pm
Location: Devon

Overheating SE5a got me thinking about my 6a...

Post by Dennis Nicholas » Mon Dec 30, 2019 6:50 pm

yosini wrote:
Sun Dec 29, 2019 11:03 pm
Hi,

Just reading the previous post about the potential inaccuracy of gauges and it made me think; so many people (myself included) worry unduly about what the temp gauge says when it would be great if someone could post actual proper laser measurer temps from different parts of the engine for us to check against. I have one of these laser measures and aside from being quite cheap on Amazon, or wherever, they are super useful. I now know my Cerbera runs about 5 degrees less than what the gauge reads and my Interceptor 10 degrees less. Panics over. My 6a runs just around 95-100 all day long summer or winter so I just assume that it is healthy and happy and probably a crappy gauge, it would be good to get that reassurance though....So if anyone can post some laser readings from their 6's that would be useful. Also my petrol gauge is empty when just under 1/4 full so I'm intrigued by this voltage regulator thing.....

Cheers

Joe
Read further and you will see that the gauges can be calibrated. On the back there are two little bits of cork covering holes (though they may have fallen off). What needs to be realised is that these are the access to two leavers; one is marked "E" and one is marked "F" the E adjusts the lower end of the scale while the F adjusts the upper end of the scale; it should be realised that adjusting one affects the other so a bit of back and forth checking and adjusting is required. You will find the details of how to calibrate and pictures of the inside of the back of the mechanism. Voltage regulator may not have anything to do with the poor reading...as long as the correct 10V is measured at the terminals of the petrol and temp gauges.
Been through this when I fitted a new temperature sender.....have infra red temp meter for checking head at sender outlet. Now temp gauge in GTC runs varying between just over the 90 deg and just under the 110 deg marks.....88 deg thermostat fitted.

Dennis


Dennis Nicholas(RSSOC)
1980 GTC Trafalgar Blue, 2010 basic Skoda Yeti (petrol), Austin 7s, Rileys.

mark rudder
RSSOC Member
Posts: 170
Joined: Thu Dec 21, 2017 6:05 am

Overheating SE5a got me thinking about my 6a...

Post by mark rudder » Mon Dec 30, 2019 11:17 pm

Hi b.c. flat hat (flat chat perhaps?), I discovered the stopping 1/4 full thing learning the car (the hard way!)
Mark thanks for the tip, I haven't done the electrical checks yet.


Mark from down under.
Current GTE 6B, Scirocco R. Past Dolomite Sprint, XJS (manual), V12 E-type (manual, convertible, lovely) 350 chev XJ6, TR6, TR4, Sprite, Midget, local Ford V8s, others... There's a pattern here.….

old bean
Posts: 257
Joined: Tue Aug 31, 2010 12:28 am

Overheating SE5a got me thinking about my 6a...

Post by old bean » Mon Dec 30, 2019 11:32 pm

rebel alliance wrote:
Mon Dec 30, 2019 12:38 am
Did you buy the Kitten ?
Not my thread so I shouldn't reply here but briefly, no, been too busy to call.



User avatar
Dennis Nicholas
RSSOC Member
Posts: 764
Joined: Wed Jun 20, 2007 1:22 pm
Location: Devon

Overheating SE5a got me thinking about my 6a...

Post by Dennis Nicholas » Tue Dec 31, 2019 10:38 pm

I should have said that Giddo's method of temperature sender put in a pan of boiling water(100 deg C) should show you where the pointer is and where it aught to be.


Dennis Nicholas(RSSOC)
1980 GTC Trafalgar Blue, 2010 basic Skoda Yeti (petrol), Austin 7s, Rileys.

Post Reply

Return to “General Technical Discussion”