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no compression after tgv delete?

Old 24 September 2018, 07:15 PM
  #1  
Tom Foster
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Default no compression after tgv delete?

hi all a bit of a problem after getting my cars engine rebuilt buy and maped. i started getting tgv problems. so i looked up on how to delete them so i manage to get a delete kit. from icp with all gaskets ect i removed the inlet and got it resprayed thought i might as well seems iv got to remove it to get to the tgvs .and then refitted every thing .for some reason the car wouldn't start very easy when it did it ran crap now wont start at all .so had it towed to local garage they say its got no compression in any cylinders .i just think thats a bit odd .any idears
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Old 25 September 2018, 08:47 AM
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rsjohn
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Did you take it back to the garage that did the engine rebuild or even contact them?
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Old 25 September 2018, 10:04 AM
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Loads of questions about paint where gaskets fit, were new inlet gaskets used ?
You don`t just loose compression by removing and refitting the inlet manifold.
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Old 25 September 2018, 11:22 AM
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Originally Posted by JDM_Stig View Post
Loads of questions about paint where gaskets fit, were new inlet gaskets used ?
You don`t just loose compression by removing and refitting the inlet manifold.
Everything points to an issue with refitting the inlet manifold/painting, as you suggest, as that is the only part that has been touched.
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Old 25 September 2018, 04:27 PM
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stockcar
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was it bead blasted clean by any chance??

if so its possible grit has remained in the manifold and contaminated / damaged the bores when started............
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Old 25 September 2018, 04:28 PM
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Originally Posted by stockcar View Post
was it bead blasted clean by any chance??

if so its possible grit has remained in the manifold and contaminated / damaged the bores when started............
Exactly what's recently happened to a friend of mine and my first thought.
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Old 25 September 2018, 05:12 PM
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Originally Posted by Jay Cartay View Post
Exactly what's recently happened to a friend of mine and my first thought.
this happened to me too years ago on a type r. It shot the bores
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Old 25 September 2018, 06:19 PM
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Tom Foster
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UPDATE my local garage looked in to the bores with a cam and found that all of them are badly scored ?
Originally Posted by Jay Cartay View Post
Exactly what's recently happened to a friend of mine and my first thought.
yes the inlet was blasted and repainted but was cleaned out be for being refitted .and was never run after (coundant get it started thats why i had taken it to the garage )
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Old 26 September 2018, 01:51 PM
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Originally Posted by Tom Foster View Post
UPDATE my local garage looked in to the bores with a cam and found that all of them are badly scored ?

yes the inlet was blasted and repainted but was cleaned out be for being refitted .and was never run after (coundant get it started thats why i had taken it to the garage )
He thought his was clean too... Trying to start it could have scored the bores if media was present, surely?
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Old 26 September 2018, 02:53 PM
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Ouch. Sorry to hear this, That's rough.
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Old 26 September 2018, 03:12 PM
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rsjohn
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Surely if there was media in the inlet it would only be a small amount and would still start initially
And surely it wouldnt loose all compression just like that or does it have some still?
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Old 26 September 2018, 03:30 PM
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Originally Posted by rsjohn View Post
Surely if there was media in the inlet it would only be a small amount and would still start initially
And surely it wouldnt loose all compression just like that or does it have some still?
Exactly
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Old 26 September 2018, 04:46 PM
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Tom Foster
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Originally Posted by rsjohn View Post
Surely if there was media in the inlet it would only be a small amount and would still start initially
And surely it wouldnt loose all compression just like that or does it have some still?
I did manage to get it started advenchaly after I fitted the inlet but was trying for ages to start it just kept turning over .there is some compression not a lot between 10 to 20 psi
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Old 26 September 2018, 06:09 PM
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Originally Posted by Tom Foster View Post
I did manage to get it started advenchaly after I fitted the inlet but was trying for ages to start it just kept turning over .there is some compression not a lot between 10 to 20 psi
Even if the bores are scored, i cant see how it would lose compression unless there was that much media in there its clogged the rings - and even then i think its highly unlikely.

Have you checked the cam timing is correct?
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Old 26 September 2018, 10:05 PM
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Good chance the blast medium is stuck around the inlet valves/seats and not allowing the valves to close onto the seats,hence almost zero compression.
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Old 09 October 2018, 12:49 PM
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Did the OP ever get to the bottom of this?
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