Loud Valve train at startup.
Submitted: Tuesday, May 01, 2007 at 19:57
ThreadID:
44986
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3
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Goldsahara
Greetings tonight,,
My 12ht motor has a loud valve train at cold start up. It lasts only a few seconds and once lubricated, operates normally, I would only like to know if this is a normal trait of that particular motor.
Thanks in advance..
Reply By: Dave198 - Tuesday, May 01, 2007 at 20:38
Tuesday, May 01, 2007 at 20:38
G'day Goldsahara,
mine does not do that.
Mine has 217,000Km
Dave
AnswerID:
237253
Follow Up By: Oldsquizzy (Kununurra) - Tuesday, May 01, 2007 at 21:06
Tuesday, May 01, 2007 at 21:06
Nor does
mine at 412000
FollowupID:
498266
Follow Up By: Tim HJ61 (WA) - Wednesday, May 02, 2007 at 01:10
Wednesday, May 02, 2007 at 01:10
Nor
mine at 145,000
FollowupID:
498327
Reply By: furph - Tuesday, May 01, 2007 at 21:12
Tuesday, May 01, 2007 at 21:12
THe 2h/12ht motor is known for wear on the rocker arm tip. You can adjust the clearence but it could still be 20thou out.
The rocker shaft is probably worn in your case. A problem with dirty oil, the contamination embeds in the bushes and laps a groove in the shaft.
Pretty easy fix, but how is the hot oil pressure holding up at idle?
furph
AnswerID:
237268
Follow Up By: Goldsahara - Wednesday, May 02, 2007 at 19:38
Wednesday, May 02, 2007 at 19:38
Hey furph,
The hot oil pressure idicates over half on the factory dash guage at running speeds and drops slowly to under half when slowed to idle. About a 1/4 each side.
I dont know how accurate the dash units are but i guess reasonably.
Thanks.
FollowupID:
498507
Reply By: Member - BUNDY BOY (WA) - Wednesday, May 02, 2007 at 05:28
Wednesday, May 02, 2007 at 05:28
hay there ..i know this sounds silly ....try ..new oil...or maybe oil pick-ups clogged.....or Wynn's tunes up frees up sticky lifters..im not one for additives but it works
cheers
AnswerID:
237329