Oily Clutch

Post any Tech Tips or any matters and questions relating to upkeep
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dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

Oily Clutch

Post by dadiomalta » Mon Jun 24, 2013 11:58 am

I bought my Tiger second hand in 1965 and it was restored by Kieth Hampson and Brian Postle in about 2000 before I took it out to Malta with me. It has done about 90K miles.It is only during the last five years that the clutch has had to be replaced not once but twice after having its annual oil change. Brian tells me that this is probably the result of it being filled with too much oil. Funny that it never happened in the previous 40+ years. I now have to have a new clutch fitted and before ordering the necessary parts I wonder whether anyone has any suggestions for what parts to buy and also any advice I should give the mechanic on removing the engine. There is one other oddity which is that the oil pressure is 75/100psi.
( I have checked Tech Tips and dug out my copies of our club mag Nos 2 and 36, I see in No 2 that in 1976 a slightly tatty car was offered at£500 and ERW729C an ex works was asking £1175).

ksherlock
Posts: 91
Joined: Thu Jun 30, 2011 9:25 am

clutch

Post by ksherlock » Wed Jun 26, 2013 8:21 am

I replaced my clutch 3 years ago and used a standard diaphram spring unit from the club. The clutch is great but I did have to replace the slave cylinder pushrod with a longer one as there was too much clearance between the adjusting nut and the clutch release arm even with the nut at its maximum adjustment. I used a 4" x 5/16 " UNF bolt cut to about 1" longer than the original pushrod. The original Long Style pressure plates ( 3 finger ) are still available from David Kee Toploader Transmissions in San Antonio. I think they are made by McLeod.

dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

Post by dadiomalta » Thu Jun 27, 2013 8:52 pm

Thanks for that but there are still the oil getting to the clutch and the very high oil pressure which has broken two gauges. I think I am going to have to get the engine stripped down to find the obstruction

garyv8tiger
Posts: 650
Joined: Sun Dec 30, 2007 10:57 am

Post by garyv8tiger » Sat Jun 29, 2013 12:51 pm

dadiomalta wrote:Thanks for that but there are still the oil getting to the clutch and the very high oil pressure which has broken two gauges. I think I am going to have to get the engine stripped down to find the obstruction
did brian rebuild the engine

dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

oily clutch

Post by dadiomalta » Sat Jun 29, 2013 1:13 pm

Yes he did circa 2002

garyv8tiger
Posts: 650
Joined: Sun Dec 30, 2007 10:57 am

Post by garyv8tiger » Sat Jun 29, 2013 10:08 pm

have you always had the same problem since it was rebuilt .

dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

Oily Clutch

Post by dadiomalta » Sun Jun 30, 2013 2:32 pm

No it only started two or three years ago. A dodgy garage was changing the oil and said that they had had to replace the clutch because it was slipping and was found to be oily. Strangely I had not noticed the defect. The clutch is now being replaced again and I have ordered a fourth replacement oil gauge

tigerman7347
Posts: 216
Joined: Thu Feb 08, 2007 11:52 pm
Location: Devon

Oily clutch

Post by tigerman7347 » Sun Jun 30, 2013 7:06 pm

Do you know if there is a Hi Volume oil pump fitted ,that will give 75 lbs + on the gauge.

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redbaron
Posts: 111
Joined: Sun Aug 16, 2009 6:18 pm
Location: Essex

Oily Clutch

Post by redbaron » Mon Jul 01, 2013 8:36 am

The high oil pressure that you have is propably caused by a stuck pressure relief valve in the oil pump,a High Volume pump will move a larger amount of oil through the system,High Pressure pump will do just that,e.g High Pressure.

Not always a good idea to fit a High Pressure pump as the oil is pushed out and through bearing to quickly,will not allow adequate cooling and lube time.
Also help to promote weeping and leaks of oil seals etc.

Try fitting a new High Volume oil pump and real seal flywheel bolts in crankshaft,to stop oil migration onto disc.

dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

Oily clutch

Post by dadiomalta » Mon Jul 01, 2013 8:37 am

The answer to your question is in the post you have replied to.
The engine is now being removed with the probable culprit being debris in the pressure relief valve.
I will report again in due course.

dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

oily clutch

Post by dadiomalta » Mon Jul 01, 2013 8:50 am

Sorry Redbaron, my response was to the post before yours. Your view corresponds with the advice that I have received from Brian Postle.
I will report result in due course when parts received from the UK and fitted.

V8 burble
Posts: 278
Joined: Thu Sep 03, 2009 10:13 am

Post by V8 burble » Tue Jul 02, 2013 10:25 am

dadiomalta,

The great oil pump debate will continue for ever (stock?, high volume?, high pressure?).

For a good explanation of the inner workings of an engine's oil system have a look at the #7 post from Dan Jones (In my daily driver 1987 Ford Mustang GT with 5.0L Ford, I run a blueprinted Melling stock volume pump. It has over 220K miles and I set my bearing clearances on the tight side of the factory range):

http://forum.britishv8.org/read.php?6,15767

A high volume pump will also produce increased oil pressure compared to a stock pump which has both standard volume and standard pressure.

For your requirements a stock oil pump with standard volume and pressure is fine.
For extra peace of mind it may be a good idea to use a heavy duty oil pump drive shaft.

Examples:
Stock volume and pressure Melling pump M68:
http://www.summitracing.com/parts/mel-m68

The more expensive Melling 10687 pump is a higher quality, performance standard volume pump:
http://www.summitracing.com/parts/mel-10687

ARP heavy duty driveshaft:
http://www.summitracing.com/parts/arp-154-7904

dadiomalta
Posts: 10
Joined: Thu Apr 04, 2013 7:53 pm

Oily Clutch

Post by dadiomalta » Tue Jul 02, 2013 11:58 am

Many thanks for all the info. The car is now in for repair as soon as the parts arrive from the UK. I will post the findings as soon as I get them.

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