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what do i look for???

 
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mgbloke
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Joined: 17 May 2007
Posts: 507


1969 MG MGB GT V8

PostPosted: Wed Sep 13, 2017 2:36 pm    Post subject: what do i look for??? Reply with quote

Hi all,

Ive been having some issues with my TA heads!.
Have had another engine refresh ( well rebuild actually new pistons, rings and rebore) another new M248 cam.

The car drives fine on the road but when I hit the track this happens:-
https://www.youtube.com/watch?v=0gv7Vw7FzUw&t=326s

It is exactly the same problem that I had before and never found because of other issues (long story).

It seems to be No 5 cylinder. Have had stem seals done twice so don't think it is that. visual inspection shows nothing.
Fine on startup with no sign of smoke.

Ideas anyone?

Cheers

Mark
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mgbloke
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Joined: 17 May 2007
Posts: 507


1969 MG MGB GT V8

PostPosted: Wed Sep 13, 2017 6:26 pm    Post subject: Reply with quote

I have just spotted that the oil return holes from the head are half blocked by the head gasket. The TA head must have the drain back in a slightly different place. (heads still fitted)
Its not going to cause the problem but must cause oil to pool in the head.
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Coops
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Joined: 17 Nov 2006
Posts: 6045
Location: Newbury, Berks

1986 Ford Capri

PostPosted: Thu Sep 14, 2017 5:28 pm    Post subject: Reply with quote

hi mate,
I'm running TA Heads with no issues,
Breather issue?
how do you know its no5? the plug oiling up???
_________________
Regards Tony C (COOPS)

MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Rotrex C38-91 supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 404 RWHP, (4.6)
New Forged 4.8 V8 kitted out with the dogs Cajones of parts and a procharger D1SC. 2017 Very Happy
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
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mgbloke
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Joined: 17 May 2007
Posts: 507


1969 MG MGB GT V8

PostPosted: Thu Sep 14, 2017 8:34 pm    Post subject: Reply with quote

Yes no 5 plug oily as hell.
Have you the same issue with head gasket blocking oilways.
look down the hole with covers off.

I will take heads off at weekend to investigate.

how is yours running?

cheers
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Coops
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Joined: 17 Nov 2006
Posts: 6045
Location: Newbury, Berks

1986 Ford Capri

PostPosted: Fri Sep 15, 2017 6:05 am    Post subject: Reply with quote

Yeah mine blocks the oil flow back holes but only by a little 3/4 hole clear.
I run the TA roller rockers and pushrods on mine too (doubt makes any difference regarding your problem)
Mines running real sweet to be honest.

Have you a cracked head at all??
_________________
Regards Tony C (COOPS)

MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Rotrex C38-91 supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 404 RWHP, (4.6)
New Forged 4.8 V8 kitted out with the dogs Cajones of parts and a procharger D1SC. 2017 Very Happy
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
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BISH V8
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Joined: 20 Aug 2010
Posts: 84
Location: wiltshire


PostPosted: Sat Sep 16, 2017 12:06 pm    Post subject: Reply with quote

And here's the answer..


https://www.facebook.com/bish.bosh.165/posts/1633239060040012
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1972 mgb v8 4.6 roadster
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mgbloke
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Joined: 17 May 2007
Posts: 507


1969 MG MGB GT V8

PostPosted: Sat Sep 16, 2017 3:42 pm    Post subject: Reply with quote

Yes, the problem has been identified.
No5 inlet pushrod hole is slightly offset and when I cleaned the casting flash up I accidentally left the wall wafer thin resulting in a hole.
hopefully it is repairable with some ally welding.

ooops!
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stevieturbo
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Joined: 18 Nov 2006
Posts: 3423
Location: Northern Ireland

1980 Ford Granada

PostPosted: Sat Sep 16, 2017 8:31 pm    Post subject: Reply with quote

If cleaned up, even a good epoxy might be an option ?

Sleeve the PR hole ?

or as you say a little welding, or some of that cold welding type stuff.

Always some sort of solution.
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9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
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Coops
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Joined: 17 Nov 2006
Posts: 6045
Location: Newbury, Berks

1986 Ford Capri

PostPosted: Sun Sep 17, 2017 8:58 pm    Post subject: Reply with quote

thin sleeve in the pushrod hole?
_________________
Regards Tony C (COOPS)

MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Rotrex C38-91 supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 404 RWHP, (4.6)
New Forged 4.8 V8 kitted out with the dogs Cajones of parts and a procharger D1SC. 2017 Very Happy
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
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mgbloke
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Joined: 17 May 2007
Posts: 507


1969 MG MGB GT V8

PostPosted: Mon Sep 18, 2017 9:28 am    Post subject: Reply with quote

Thanks guys,

Local engineering shop are fitting a sleeve to the pushrod hole.

cheers.
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Coops
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Joined: 17 Nov 2006
Posts: 6045
Location: Newbury, Berks

1986 Ford Capri

PostPosted: Mon Sep 18, 2017 11:17 am    Post subject: Reply with quote

nice one mate good luck
_________________
Regards Tony C (COOPS)

MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Rotrex C38-91 supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 404 RWHP, (4.6)
New Forged 4.8 V8 kitted out with the dogs Cajones of parts and a procharger D1SC. 2017 Very Happy
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
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View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
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