4.6 v8 not starting after heads skimmed

M

Mrs Red

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• Tuesday at 21:41

• #1

Hi everyone
I've recently had the heads skimmed on my 4.6v8 thor engine. Engine has been put back together but now wont start. Its trying but won't have it. Any ideas?
Its got fuel, new plug leads etc but nothing
I've been told it could be a compression issue because the heads were skimmed, if so any ideas how I can solve this.
Thank you

 

Stanleysteamer

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• Tuesday at 22:23

• #2

Welcome to the forum!

How is it cranking? as before, is it struggling?

 

M

Mrs Red

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• Tuesday at 22:30

• #3

It's turning over trying to start but won't. Before started no problems.

 

Stanleysteamer

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• Tuesday at 22:33

• #4

Mrs Red said:

It's turning over trying to start but won't. Before started no problems.

Click to expand...

If you have increased the compression lot you must expect it to be harder to turn over with the previous starter motor.
By how much have you increased it?

 

Stanleysteamer

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• Tuesday at 23:20

• #5

Have you tried squirting Eazistart, or the equivalent, into the air filter, or other part of the induction system then cranking to see of it starts?

 

Mark Piercy

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• Yesterday at 06:24

• #6

It sounds like it's not getting fuel. Is the in tank pump working?
Have you checked for spark?
I'd go back over the work to see if anything has been overlooked
Did it run OK before the repair (apart from the original issue)?

 

kermit_rr

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• Yesterday at 07:46

• #7

Are the valves closing fully? Has the compression actually been checked? You might need rocker pillar shims

 

norseman

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• Yesterday at 07:52

• #8

Stanleysteamer said:

Have you tried squirting Eazistart, or the equivalent, into the air filter, or other part of the induction system then cranking to see of it starts?

Click to expand...

 

pwood999

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• Yesterday at 09:46

• #9

Mrs Red said:

I've been told it could be a compression issue because the heads were skimmed, if so any ideas how I can solve this.

Click to expand...

If someone said compression is not right, what PSI is it getting, and what are they basing that statement on ?


Not sure on Thor, but on GEMS crank sensor will prevent starting, but nothing gets logged on diagnostics.

Are all the basics ok ? Compression, Spark, Fuel getting to injectors, etc. ?