I'm conducting a poll on SOHC engines with broken timing belts.
I'd like to hear your broken timing belt story.
Did it bend valves or not?

 

Did you break your timing belt or something?

 

Mine never broke.

 

I have not broken a timing belt on my 98 accord 4-cyl. with 125k. But, I had a 83 Toyota Camry SOHC 4-cyl. 10 years ago when the water pump seized up while driving and the timing belt broke. I was going about 40 miles per hour. Took it to a dealership and the engine was perfect. I drove that car for years later and put over 180k miles total before i sold it. Here is one advantage Toyota has over Honda.

 

mine broke on my f22A1 block & f20a4 head...

bent all 8 exhaust valves and 2 intake valves for sure but the other 6 intake valves are questionable and I haven't really had them checked out...at least 4-5 made some sort of noticeable contact...no damage to the head, pistons or cylinders... the valves and cam gear took the brunt of it...

After talking to and showing the remains to 3 shops and 2 seperate honda service departments the official explanation is a defect in the timing belt... it had very limited mileage on it...under 30k...

but hey... I got some free parts out of it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Elvis1977 &raquo;</TD></TR><TR><TD CLASS="quote">Here is one advantage Toyota has over Honda.</TD></TR></TABLE>

What're you talking about? Most SOHC engines are clearance because the valve timing isn't as aggressive as dual. I know the F22B1 is clearance and many others are as well

 

I thought the F series were interference engines. Can anyone clarify this?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TouringAccord &raquo;</TD></TR><TR><TD CLASS="quote">Did you break your timing belt or something?</TD></TR></TABLE>

No, I'm simply tring to get some facts and possibly settle the debate as to whether
SOHC engines bend valves or not when the belt breaks.
I say that they usually DON'T.

Let the replies begin.......

 

184K (2 belts) and nothing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VRDrvr &raquo;</TD></TR><TR><TD CLASS="quote">184K (2 belts) and nothing

</TD></TR></TABLE>

are you going to try to replace the belt ahead of time instead of having a 3rd one brreak???

 

1st one chamged at 85K
2nd one at 183K

So why would I replace a new t-belt with 2K on it??

3rd one will be at 275K

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VRDrvr &raquo;</TD></TR><TR><TD CLASS="quote">3rd one will be at 275K</TD></TR></TABLE>


thats what i like to hear

 

i have only experienced this on a 87 civic and the 1st and 3rd were bent plenty

 

Generally, no, but it's still possible. SOHC engines aren't susceptible to valve and other head damage as DOHC engines can have when timing belts break. But both are interfence type engines. Nissan, I hear, aren't interference engines. Never took a Nissan head apart but I trust my mechanic.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cmrvi1 &raquo;</TD></TR><TR><TD CLASS="quote">

No, I'm simply tring to get some facts and possibly settle the debate as to whether
SOHC engines bend valves or not when the belt breaks.
I say that they usually DON'T.

Let the replies begin.......</TD></TR></TABLE>

oh, ok.

I changed the timing belt on my Accord motor at around 85-90K but only but about 8K miles on after since I totalled the car. Now it sits on an engine stand waiting to be rebuilt and swapped.

I'm about to change the one in my Civic since it has about 85K on it and I don't know if it was ever changed. But after working on this car and seeing the work of the previous owner I don't trust anything.

I don't know if the SOHC motors are interference motors or not but I don't intead on finding out.

 

The F22 is an interference type.

The reason I know is because once I had two bent exhaust valves that would stick down when slowly rotating the crank.
They POPPED up when the piston pushed on them.