Head work

[NotSoSlowSHO]

In my ideal world, valves should be re-adjusted after 10 hours of operation any time the heads have been reinstalled.

Excellent advice, no matter what motor you are working on.

Unless it's an aircooled VW. I remember the days.... after installing new heads, the valves typically had to be adjusted at least 4 times before you had driven 500 miles, before everything was completely seated and quite moving on you.

 

[Call_Me_crazy]

Yeah, but when a motor sits, the oil doesn't burn up in the top end like that; that's clearly from a consistent lack of maintenance plain and simple. Those heads are trash, cleaning may make them look pretty, but that's about it. Even if they were crystal clean, the warping makes them more valuable as scrap aluminum to me. The worn rod bearings are another indicator that this whole motor isn't worth putting a penny into, cause you'll just be paying to do it all over again not too far into the future.

FWIW, the warped heads weren't caused by a blown HG, it was the other way around (sort of). Your motor was overheated, warped the heads, which then caused the HG's to fail.

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FWIW NO one said the heads were warped, I really dont think they are! And yes the motor (was)is extremely nasty but ive seen worse on lower mileage cars, Its cleaned up really nicely! The Rod bearing were no more worn than what you would expect from a car with 150,000 miles that has never had any major work done to it! I think it will be fine in the end! we will see it goes to the machine shop next week!

 

[Racer X]

$300?

The highest quote I've gotten on checking and cleaning my heads was $90 for both, and to adjust them also was $190. These heads can't be milled really, since you'll have issues wtih the intake sitting properly if you do mill them.

$300 is way high, $1000 is just obscene.

 

[Call_Me_crazy]

The heads go in today we shall see what happens! The guy i am taking them to has done many SHO motors befor and I feel confident he'll do a good job for the money. At this point is not the cost i am concerned about, Almost every place i talked to in Houston wouldnt touch them, They either didnt know anything about them or just flat out would work on anything to do with a yamaha motor. Cant wait to get them back!