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TR6 Does a TR6 need an engine to chassis ground strap?
- Thread starter tdskip
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TR3driver
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Re: Does a TR6 need an engine to chassis ground st
Something muddled here, the engine ground strap shouldn't connect to the steering column. The steering column has to be grounded for the horn to work, but it's not the engine block ground.
There may have been some variation over the years, but what I recall is Moss 736-270, which connects the engine block directly to the negative battery post (with a tab for grounding the body in the middle of it). IMO this is a much better arrangement than the separate straps (and starter current through the body) used on earlier TRs.
Something muddled here, the engine ground strap shouldn't connect to the steering column. The steering column has to be grounded for the horn to work, but it's not the engine block ground.
There may have been some variation over the years, but what I recall is Moss 736-270, which connects the engine block directly to the negative battery post (with a tab for grounding the body in the middle of it). IMO this is a much better arrangement than the separate straps (and starter current through the body) used on earlier TRs.
Re: Does a TR6 need an engine to chassis ground st
So here is the deal - when I look at the TR4 I have a battrty to transmission housing ground and a thick braided cable from the front of the engine to the frame.
The '74 TR6 has the same battery to the transmission housing ground but a thick braided cable from the front of the engine to the frame.
The 74 TR6 does have a thin cable (ground it looks like) that attaches to the steering rack.
Com[aring the cars, and noting that the TR8 has the same thick braided cable from engine to front subframe area, I assumed that the '74 TR6 was missing an engine to frame ground.
So here is the deal - when I look at the TR4 I have a battrty to transmission housing ground and a thick braided cable from the front of the engine to the frame.
The '74 TR6 has the same battery to the transmission housing ground but a thick braided cable from the front of the engine to the frame.
The 74 TR6 does have a thin cable (ground it looks like) that attaches to the steering rack.
Com[aring the cars, and noting that the TR8 has the same thick braided cable from engine to front subframe area, I assumed that the '74 TR6 was missing an engine to frame ground.
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Re: Does a TR6 need an engine to chassis ground st
There's a braided strap from engine to firewall, no?
That said, I have some very thick stuff going from engine to chassis, and still have problems with floating grounds - it's more of a problem with an ECU and FI, so you have to be a tad more careful...
There's a braided strap from engine to firewall, no?
That said, I have some very thick stuff going from engine to chassis, and still have problems with floating grounds - it's more of a problem with an ECU and FI, so you have to be a tad more careful...
TR3driver
Great Pumpkin - R.I.P
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Re: Does a TR6 need an engine to chassis ground st
I believe that was added at some point. Original TR4 configuration would have been a short heavy cable from the battery to the body, plus the cable you mention at the front from engine to frame.<div class="ubbcode-block"><div class="ubbcode-header">Quote:]The '74 TR6 has the same battery to the transmission housing ground[/QUOTE]I believe there should be a tab in the middle of that cable, that attaches to the body.<div class="ubbcode-block"><div class="ubbcode-header">Quote:] but a thick braided cable from the front of the engine to the frame.[/QUOTE]Sounds like another addition. Certainly won't hurt anything, but not necessary if the tab is grounded. [/quote]tdskip said:
Brosky
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Re: Does a TR6 need an engine to chassis ground st
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]There's a braided strap from engine to firewall, no?[/QUOTE]
Well, yes, but it's the braided strap that comes from the negative battery post, below the head to the back of the block and then behind the throttle shaft to the firewall.
I had to take three pics because I couldn't get it clearly in one or two.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]There's a braided strap from engine to firewall, no?[/QUOTE]
Well, yes, but it's the braided strap that comes from the negative battery post, below the head to the back of the block and then behind the throttle shaft to the firewall.
I had to take three pics because I couldn't get it clearly in one or two.
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SpannerMan
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Re: Does a TR6 need an engine to chassis ground st
(71 TR6) I have the cable from the bellhousing to the battery, with the extra loop in the middle of it that gets bolted to the body. I advise to make sure any ground straps with extra length are kept well away from danger of getting wrapped up in the steering column (potentially disastrous consequences!)
(71 TR6) I have the cable from the bellhousing to the battery, with the extra loop in the middle of it that gets bolted to the body. I advise to make sure any ground straps with extra length are kept well away from danger of getting wrapped up in the steering column (potentially disastrous consequences!)