Triumphrat

kredge · 11-11-2009, 10:47 PM

I'm wondering if I found a typo in the FSM. It says to tighten the cylinder head bolts in three stages with the second stage to 35NM? The Haynes manual says 27NM is the second stage and my '02 and up Sprint FSM says 27NM too.
Does the Daytona require a tighter head? Did I just warp it? On the third stage turning the bolts 90 degrees seemed way too tight.

Thanks!

DEcosse · 11-11-2009, 11:38 PM

I have the 97-01 S3/Daytona Factory manual & it is identical to the spec/procedure in the 02+ S3/Daytona, Sprint 99-01 and 02+ Sprint
Stage 1 - 20 Nm
Stage 2 - 27Nm
Stage 3 - 90 degree Torque turn.

The 1050 Engine has 20 - 35 - +90 deg spec.

bradtx · 11-12-2009, 12:04 PM

Kredge, If you tightened the bolts in the proper geographical sequence, it's unlikely you warped the head.

Option one; At this point you've likely compressed the metal rings that surround the cylinders slightly more than designed. If you simply back out the bolts and retorque it's a possibility that you'll not have the proper sealing pressure on those rings.

Option two; Run the engine as is. Keep a watchful eye for any signs of a head gasket failure.

Option three; Remove the head, replace the head gasket and properly retorque. Obviously the preferred option.

Brad

kredge · 11-12-2009, 12:41 PM

Thanks both of you, I really appreciate the help.

I was going to include a picture of the paragraph in my manual stating the 35NM figure but I'm sure you guys can take my word for it and I don't want to go against the AUP.

I did start the engine and there was what sounded like a horrible squeaking noise that I'm hoping was actually a whistling sound coming from the head. As I was examining it oil began to seep out of the joint. I think I saw a little blue engine ice coming out too. I did reuse the head gasket that was on there, however, the engine had never been run.

I'll order a new head gasket and while I have the head off I'll try to find a flat surface to check for warpage.

Brad, you think over torqueing(sp?) it would've caused a gasket failure?
I did torque the bolts in the specified sequence.

bradtx · 11-12-2009, 03:38 PM

Kredge, A head gasket is a single use use item with a lifetime of one torque down of the cylinder head.

Brad

kredge · 11-12-2009, 03:38 PM

I called a Triumph dealer and talked to the service manager. He read me a service bulletin saying the second stage should be 20FT-LBS (27NM) then turn it 60 degrees. And I think he said it shouldn't exceed 40FT-LBS.

So there you have it.

kredge · 11-12-2009, 03:42 PM

It's funny, this is the engine I've been posting about in another thread and the supplier actually said I should just reuse the gasket. It's funny because after all that's happened you'd think I wouldn't listen to the guy anymore. But thanks Brad. I was able to order a new one from a local shop and I'll possibly get it by tomorrow.

DEcosse · 11-12-2009, 04:20 PM

Quote:

Originally Posted by kredge

It's funny, this is the engine I've been posting about in another thread and the supplier actually said I should just reuse the gasket. ....

Excuse me for chuckling kredge - you think he maybe already re-used a used gasket?

kredge · 11-13-2009, 11:10 AM

Heh, heh... yeah, the valve cover gasket's sure seen better days, too.

bradtx · 11-14-2009, 02:00 AM

kredge, If you didn't order a cam cover gasket, a smear of silicone may suffice, primarily on the cam wedges. I wouldn't be surprised if, DEcosse, isn't correct in his suspicions.

I just think it's just appalling for you to go through this grief (keeping it clean). Hopefully you'll have the Triumph up and wailing as God and Queen intended!

Brad