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skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
How to time a rover 4.0
Posted by: skootch13
Date: August 21, 2020 09:05AM

I believe My Rover V8 is out of time. When I went to check it I noticed that there is no pointer on my engine. So I ordered one from the Wedge Shop.

It seems that this is adjustable, which is fine. I can use a piston stop to find TDC.

First question is, how does this thing go on? I've attached a pic with the pointer on the drivers side and pointer pointing towards the passenger side. There is only one 1/4" bolt hole tapped on my timing cover. Seems awful far from the damper....

Second question, Where do the timing marks show up on these engines? At around 12 o'clock or more toward the driver's or passenger side?

As for being out of time, when I hit the damper with a timing light, the timing marks were down around 8 o'clock when viewing from head on. That sure doesn't sound right...

20200821_072741.jpg
20200820_184350.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5966 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: How to time a rover 4.0
Posted by: BlownMGB-V8
Date: August 21, 2020 10:54AM

Aaron, just curious but where in Cinti are you located if you don't mind? I'm in N. KY.

Those engines didn't have pointers because the ignition is taken off the flywheel and controlled by the ECM. So it matters what engine controller you are using and how it is triggered.

Some of the BOPRs had the timing tab on the right and some had it on the left. Typically 215s on the left, Rovers...eh? Probably left. So if the advance is in, 8:00 could be close.

It's possible there is a timing window somewhere on the bellhousing flange of the engine to flash on a mark on the flywheel under specific conditions.

Jim


skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: How to time a rover 4.0
Posted by: skootch13
Date: August 21, 2020 01:08PM

colerain


skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: How to time a rover 4.0
Posted by: skootch13
Date: August 21, 2020 01:09PM

Jim,

Ok, but this car has a distributor, so it has a front cover/ waterpump oil filter from god knows when. Surely this cover had a timing pointer on it somewhere?

I should add that I have MSD ignition
20200703_192227_1_50.jpg



Edited 1 time(s). Last edit at 08/21/2020 01:51PM by skootch13.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5966 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: How to time a rover 4.0
Posted by: BlownMGB-V8
Date: August 21, 2020 02:04PM

Fairly typical setup then, intermediate timing cover with carb and conventional ignition. Use a piston stop to determine TDC if you can. A degree wheel would be good but not essential. A timing pointer with degree marks or else a degree tape on the damper would be a big help. You'd need to match the damper diameter. Assuming it has a wide enough place to stick one, I expect Summit sells them.

I have some old timing covers that have the degree pointer cast in, you could stop by and make a copy of one of those that you could bolt on.

Jim


skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: How to time a rover 4.0
Posted by: skootch13
Date: August 21, 2020 02:24PM

OK, Jim, I am planing to use a piston stop. MArk the damper, rotate the engine the other, make a mark. Half way between is TDC.

There are marks on the damper. But if i need a timing tape, I will get one of those too.

Thanks for the help.


MGBV8
Carl Floyd
Kingsport, TN
(3991 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: How to time a rover 4.0
Posted by: MGBV8
Date: August 22, 2020 10:53AM

I believe that is an earlier timing cover. The intermediate cover has the crank driven oil pump & serpentine belt.

Find TDC, mark the balancer/pulley, make a pointer.

Instead of timing tape, you can scribe new marks using this calculator:

[www.csgnetwork.com]



BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5966 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: How to time a rover 4.0
Posted by: BlownMGB-V8
Date: August 22, 2020 01:21PM

That's right Carl. Here are some photos of a 215 cover and part of a SBB cover. The 215 is the darker one. You can see the timing tab is on opposite sides. I'm pretty sure the Rover tab is like the 215.

IMG_0009.JPG

IMG_0010.JPG

IMG_0011.JPG

You could make up a timing tab similar to one of these and use a couple of the attachment bolts on that side by the oil pump. The spacing between the marks doesn't have to be perfect to be usable. Also you could find the 0 mark and then use a dial type timing light to locate the other end of the scale.

Jim


MGBV8
Carl Floyd
Kingsport, TN
(3991 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: How to time a rover 4.0
Posted by: MGBV8
Date: August 22, 2020 05:26PM

Yes, my 215 timing cover looks exactly like the dark one.

As for Rover V8 covers being the same, I don't think so. Maybe the very earliest ones. There must have been 5 or 6 (or more) variations of timing covers. I have never seen one with timing marks like a Buick 215.

The Rover timing cover that I have, I think is a 1989 3.9L cover. It has a sheet metal pointer bent to a L shape & bolted on. It is straight up at 12:00. The degrees are marked on the harmonic balancer.



Edited 1 time(s). Last edit at 08/27/2020 11:27AM by MGBV8.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5966 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: How to time a rover 4.0
Posted by: BlownMGB-V8
Date: August 22, 2020 10:34PM

I've stayed away from the Rovers, though I do now have a Rover block in the shop. Didn't want it but there it sits anyway. No timing covers though. Well, find out where the mark on the damper ends up at TDC first, then decide if you want the pointer at that location. If not you will have to make another mark on the damper.

Jim


minorv8
Jukka Harkola

(208 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: How to time a rover 4.0
Posted by: minorv8
Date: August 23, 2020 05:20AM

Rovers do not have cast markings, instead they have a pointer, see photo.
Timing cover pointer.jpg


MGBV8
Carl Floyd
Kingsport, TN
(3991 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: How to time a rover 4.0
Posted by: MGBV8
Date: August 23, 2020 08:08AM

Yes, that is what the pointer looks like on my 3.9 timing cover.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5966 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: How to time a rover 4.0
Posted by: BlownMGB-V8
Date: August 23, 2020 10:11AM

So then you have degree markings on the damper?

Jim


MGBV8
Carl Floyd
Kingsport, TN
(3991 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: How to time a rover 4.0
Posted by: MGBV8
Date: August 23, 2020 12:53PM

Yes.


skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: How to time a rover 4.0
Posted by: skootch13
Date: August 24, 2020 09:46AM

Thank you all for the help.

i am pretty sure that mine does not have holes to mount a pointer like minorV8's does.

I will get to this later this week or on the weekend.



skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: How to time a rover 4.0
Posted by: skootch13
Date: August 31, 2020 09:18AM

Saturday my neighbor came over and we timed the engine.

My front cover is not like the ones pictured above.

We found TDC with a piston stop. Unfortunately for us, the timing marks on the pulley were no where near the pointer that i purchased from the Wedge Shop. So to find TDC we made a mark on the pulley with a Sharpie, spun the crank the other direction and made a second mark. We measured the distance between the marks and half way was TDC.

My neighbor has one of those fancy gizmo timing lights where you can dial in your timing mark. I don;t know whatthey are called. Anyway, we went with 10 BTDC. No pinging in top gear pulling a hill at 45 mph.

Yes, I understand that my "10 degBTDC" is kind of theoretical. It might be 9. Or it might be 11. I guess I could advance it until I hear pinging and then back it off a hair. But, it's good enough for now and the car runs way smoother than before.


88v8
Ivor Duarte
Gloucestershire UK
(804 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: How to time a rover 4.0
Posted by: 88v8
Date: September 03, 2020 04:28AM

It's called an Advance Timing Light.
Like this [www.harborfreight.com]

Some of them have other features like a rev counter.

Better scribe your sharpie mark if you can get at it, or put on some tape. That mark will fade away by the next time you want it :}

Ivor


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