AuthorTopic: No Power V8 3500  (Read 2341 times)

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Offline yamlandy

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No Power V8 3500
« on: December 07, 2009, 15:21:31 »
Hi,
Just picked myself up a new 1984 rangie at the weekend. Its got a 3500cc V8 on twin SU's and seems to have a distinct lack of oommph!
She starts and idles and rev's very well but once on the road and under load she couldn't pull the skin off a rice pudding, try having to change down from 5th to 4th on the motorway to maintain 55mph uphill!
If you put your foot down she just makes a load of noise (sounds like banging) but doesn't pull. It is almost better to feather the throttle and let speed build up really slowly.
Could this be timing or the points?
I'm guessing electrical as the motor has had a fair chunk of money spent in the last 3yrs.

Any wisdom would be much appreciated.

Paul

Offline Brett69

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Re: No Power V8 3500
« Reply #1 on: December 07, 2009, 15:58:19 »
Got a similar problem on my 3.5 V8, I have found out the dizzy is the problem, the vac advance is not working correctly an the spring for the bob weights is not resetting, soon as I get hold of a new distributor this should solve my problems :)
Have 4wd Need MUD!!!

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Offline bustermb

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Re: No Power V8 3500
« Reply #2 on: December 07, 2009, 19:49:24 »
Got a similar problem on my 3.5 V8, I have found out the dizzy is the problem, the vac advance is not working correctly an the spring for the bob weights is not resetting, soon as I get hold of a new distributor this should solve my problems :)
hi bud stop talking about it and fix it want to get out in it lol :dance:
matches are a p38 owners best friend

Offline ben-dent

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Re: No Power V8 3500
« Reply #3 on: December 08, 2009, 22:16:01 »
i would adjust the timing, sounds like its to advanced
Ben Haynes

1984(B) Rangie Vouge V8) (DENT)
1986(D) Rangie Vouge CCV Trialer


Offline yamlandy

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Re: No Power V8 3500
« Reply #4 on: December 09, 2009, 16:15:34 »
Thanks Ben, i'll give that a try. I've also found the exhaust has broken at the Y pipe so the lack of back pressure might not have been helping either.

Offline MuddyMike

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Re: No Power V8 3500
« Reply #5 on: December 09, 2009, 17:34:27 »
Has the camshaft been replaced? Rover V8s eat camshafts and if oil changes have been infrequent they can go through one in less than 60,000. I would not think the exhaust problem is the cause, unless its blocked that is.

Mike
If you can't get there in a Land Rover you can't get there

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Offline ben-dent

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Re: No Power V8 3500
« Reply #6 on: December 09, 2009, 20:23:01 »
Thanks Ben, i'll give that a try. I've also found the exhaust has broken at the Y pipe so the lack of back pressure might not have been helping either.


i doubt the exhaust will be a cause, as i set mine up with no headers or anything on, had to wear ear defenders though
Ben Haynes

1984(B) Rangie Vouge V8) (DENT)
1986(D) Rangie Vouge CCV Trialer


Offline woodytz

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Re: No Power V8 3500
« Reply #7 on: December 09, 2009, 23:02:49 »
if the banging sounds like its coming back through the carbs, check the cam shaft for wear, easy way is take the rocker covers off spin the engine over and see if any of the valves dont lift, it will be an exhaust thats broken

Offline Rossko

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Re: No Power V8 3500
« Reply #8 on: December 10, 2009, 20:30:47 »
My money's on worn cam too ; but do check SU dashpot oil levels.
GLASS

Offline Range Rover Blues

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Re: No Power V8 3500
« Reply #9 on: December 12, 2009, 18:02:35 »
Ignition timing, static and advanced. 

SUs set up properly (oil in the dash pots)

Cam timing.

The fact that it doesn't like wide open throttle suggests either vac advance of SU dashposts.  They should only have a spot of oil in them, not be full, though they work if full they don't work as it starts to drain out again.
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Offline yamlandy

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Re: No Power V8 3500
« Reply #10 on: December 19, 2009, 13:09:10 »
Hi Guys,
Thanks for all your advice. She's been at the local garage and runs like a dream now. They advanced the timing a bit, richened up the mixture and fitted new points and condenser - goes like a bomb now!
I've been through all the old paperwork and it seems the engine was rebuilt about four years ago so there's plenty of life in the old girl yet! ( I hope!)
                       

 






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