Plug gaps

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peter freeman
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Plug gaps

Post by peter freeman » Tue Feb 17, 2015 9:38 pm

Planning to replace the plugs just before the MOT ( first time I have done it on this engine ). I think the plugs are BCPR7ES but cannot find the info in the Haynes manual nor can I find any info re the gap which I assume is either 25 or 30 thou - can someone please confirm.



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Re: Plug gaps

Post by scimjim » Tue Feb 17, 2015 9:54 pm

it's in the "specifications" at the end of chapter one (maintenance) in the new fangled layout but not referenced anywhere (the index for example :roll:)

Champion RCY9CC or equivelant (NGK go the opposite way on heat rating IIRC) - 0.8mm gap.


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Re: Plug gaps

Post by peter freeman » Tue Feb 17, 2015 9:56 pm

0.8mm - when will they realise we are British. Cheers Jim.



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Re: Plug gaps

Post by scimjim » Tue Feb 17, 2015 9:57 pm

BCPR6ES according to this cross-ref site?


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 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
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1300 SS1 (Number One) & Sarah's coupe.
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Re: Plug gaps

Post by scimjim » Tue Feb 17, 2015 9:57 pm

peter freeman wrote:0.8mm - when will they realise we are British. Cheers Jim.
yes, you'd think Haynes would know better :-)


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
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Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
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Re: Plug gaps

Post by peter freeman » Tue Feb 17, 2015 10:09 pm

6ES - 7ES are fitted at the moment.



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Re: Plug gaps

Post by peter freeman » Tue Feb 17, 2015 10:36 pm

Jim just looked at the manual page you quoted and its a 6ES for the cars with a cat fitted 7ES for cars without cats.



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Re: Plug gaps

Post by scimjim » Tue Feb 17, 2015 10:57 pm

my manual (OWM1245 of 1999 vintage) only has Champion numbers - RC9YCC for non-cat, RS9YCC for cats.


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 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
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Re: Plug gaps

Post by peter freeman » Tue Feb 17, 2015 11:19 pm

Yes only champion quoted but RC7YCC for non cats and RC9YCC for cats - I looked up the NGK equivalents on the website you had the link to. My manual is for Granada & Scorpio March 1985 to 1994 - Haynes 1245.



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Re: Plug gaps

Post by scimjim » Wed Feb 18, 2015 12:38 am

hmm - mine (dated 1999 on first page) doesn't mention a RC7YCC but says:

RF7YCC for 1.8/2.0
RC9YCC for 2.0 DOHC
RN9YCC for 2.8 V6
RC9YCC for 2.4/2.9 without cat
RS9YCC for 2.9 with cat

all 0.8mm gap


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 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
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

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Re: Plug gaps

Post by peter freeman » Wed Feb 18, 2015 10:17 am

My book is from 1998 so they have changed things but why ?
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Re: Plug gaps

Post by *JP* » Wed Feb 18, 2015 12:24 pm




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Re: Plug gaps

Post by peter freeman » Wed Feb 18, 2015 1:10 pm

I have had a plug out and the end is tapered - perhaps the heads were modified for a flat plug after my engine was built.



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Re: Plug gaps

Post by scimjim » Wed Feb 18, 2015 1:35 pm

According to my manual there are 3 different heads for the 2.9 (same blocks all with F casting):

BRC - non-cat (F cast into head) - 9.5:1 compression, 110Kw @5700rpm/233Nm @ 3000rpm
BRD - type 9 or auto with cat (K cast into head) - 9:1 compression, 107Kw@5500rpm/222Nm @ 3000rpm
BRE - MT75 with cat (K cast into head) - 9:1 compression, 107Kw@5500rpm/226Nm @3000rpm

2.8 is PRE with E block casting and EN head casting
2.4 is ARC wth D block casting/H head casting

from the PH link above "AFAIK, the "K" means taper seats, "F" means flat seats"

of course, you have to wonder what Ford (presumably Ford Power - possibly still through Reliant?) provided MB with? :-)


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 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
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

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Re: Plug gaps

Post by philhoward » Wed Feb 18, 2015 1:42 pm

Indeed - never assume it's a "Granada" engine - could well be the same setup supplied to TVR which could have been some generic version, or just an "aftermarket" spec specifically for use by Ford (Industrial) Power (Products)/Racing/whichever name that arm had at the time. Look at the CVH they supplied for the SS1 - I think it's only presumed it was a German Sierra version, unless anyone knows different.


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